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Contents
- The climate of Spearfish
- The Best Time to Visit Spearfish
- The Worst Time to Visit Spearfish
- Spring Weather in Spearfish
- Summer Weather in Spearfish
- Autumn Weather in Spearfish
- Winter Weather in Spearfish
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The peaceful and quiet area in the Trout Fishing Pond in the scenic Spearfish Canyon, South Dakota, in the Summer Sportsman Paradise
The climate of Spearfish
Spearfish, South Dakota, enjoys a Dfb type climate, also known as Humid continental, by the Köppen climate classification. Positioned geographically within the confines of a temperate zone, this beautiful city with a no dry season presents a warm summer. This influences the weather elements, manifesting a unique weather pattern throughout its four seasons.
A yearly overview of the weather within Spearfish reveals a considerable fluctuation in temperatures. The highest temperature is registered in July, with an average high of 83.8°F (28.8°C), while the coldest month is January, bearing an average low of 16.2°F (-8.8°C). This translates to a significant span of temperatures from 16.2°F (-8.8°C) to 83.8°F (28.8°C), sculpting its varying weather conditions.
Spearfish receives a liberal dose of precipitation, as rainfall is a common feature throughout the year. Occasional snowfalls also occur, mostly concentrated within the colder months from December to March, with the highest snowfall recorded in April at 7.36" (187mm). This, coupled with the highest recorded rainfall in May at 2.32" (59mm), makes this city a hub of precipitation dynamics.
Notably, sunlight hours, a critical factor for visitors and residents alike, shift within the year. The highest daylight hours are recorded in June, amounting to 15.5 hours, with the minimum observed in December at 8.9 hours.
A yearly overview of the weather within Spearfish reveals a considerable fluctuation in temperatures. The highest temperature is registered in July, with an average high of 83.8°F (28.8°C), while the coldest month is January, bearing an average low of 16.2°F (-8.8°C). This translates to a significant span of temperatures from 16.2°F (-8.8°C) to 83.8°F (28.8°C), sculpting its varying weather conditions.
Spearfish receives a liberal dose of precipitation, as rainfall is a common feature throughout the year. Occasional snowfalls also occur, mostly concentrated within the colder months from December to March, with the highest snowfall recorded in April at 7.36" (187mm). This, coupled with the highest recorded rainfall in May at 2.32" (59mm), makes this city a hub of precipitation dynamics.
Notably, sunlight hours, a critical factor for visitors and residents alike, shift within the year. The highest daylight hours are recorded in June, amounting to 15.5 hours, with the minimum observed in December at 8.9 hours.
The Best Time to Visit Spearfish
Assessing the weather data, it is apparent that the months between June and August form the ideal time to visit Spearfish. The average high temperatures are between 72.5°F (22.5°C) and 83.8°F (28.8°C), offering a pleasantly warm climate. Sunshine hours are at their peak with 11.2 hours to 11.7 hours of sunshine per day, perfect for sightseeing and outdoor activities.
The Worst Time to Visit Spearfish
On the contrary, the period from December to February forms the least suitable season for travel. Average low temperatures drop to between 18.5°F (-7.5°C) and 16.2°F (-8.8°C), and the city experiences a substantial amount of snowfall ranging from 3.31" (84mm) to 5.04" (128mm) along with high relative humidity levels around 78% to 79%.
Spring Weather in Spearfish
Spring, experienced from March to May in Spearfish, is a season of moderate temperatures and increasing rainfall. Earnest warmth enters the scene with temperatures soaring from 44.1°F (6.7°C) in March to 61.9°F (16.6°C) in May. Rainfall steadily increases to an annual high of 2.32" (59mm) in May, and residents experience fewer daylight hours, fluctuating from 12 hours in March to 14.8 hours in May.
Summer Weather in Spearfish
Spearfish revels in a warm summer stretching from June to August. Temperatures remain stable, swirling between 74.8°F (23.8°C) to 83.8°F (28.8°C). Despite being the warmest season, the humidity level is comparatively lower, ranging from 49% to 60%. Daylight hours peak during this period, providing ample sunlight for outdoor activities.
Autumn Weather in Spearfish
Autumn in Spearfish ushers itself in with a significant drop in temperature, transitioning from 72.5°F (22.5°C) in September to 43.5°F (6.4°C) in November. Rainfall decreases going from 1.5" (38mm) in October to 0.75" (19mm) in November, whilst daylight hours steadily decrease starting at 12.5 hours in September and ending at 9.6 hours in November.
Winter Weather in Spearfish
The Spearfish winter, from December to February, is marked by freezing temperatures and plentiful snowfall. Average high temperatures remain below freezing with values ranging from 31.5°F (-0.3°C) in December to 31.1°F (-0.5°C) in January. The snow creeps in with an intensity of 3.31" (84mm) in December, rising to 5.04" (128mm) in February. This period is noted for its reduced daylight hours, with a minimum of 8.9 hours in December.
Weather in January
Expect a chilly start to the year with considerable cloudiness in Spearfish, South Dakota. The outlook is predominantly cold with high temperatures barely exceeding freezing point at 31.5°F (-0.3°C). It is common to see snowfall, contributing to the winter wonderland ambiance of the city. Weather in January »
Weather in February
If you want a respite from January's deep freeze, February offers little comfort with continued low temperatures and increased snowfall in Spearfish. Though marginally warmer at the top of the scale, 31.1°F (-0.5°C) seems equally frosty and days homologous in length. Weather in February »
Weather in March
Come March, the weather in Spearfish begins to shake off its winter inertia. Featuring a substantial increase in average high temperatures, 44.1°F (6.7°C), March offers a taste of the approaching spring months. Alongside, daylight hours start to extend noticeably. Weather in March »
Weather in April
April brings with it noticeably warmer temperatures, and typical weather averages move beyond the brisk 50s°F. On this upward climb, snowfall dips dramatically allowing rainfall to dominate the landscape of Spearfish. This shift embodies the arrival of spring with precipitation largely occurring as rain, peaking at 2.01" (51mm). Weather in April »
Weather in May
May in Spearfish generates a noticeable transition away from spring-like conditions towards early summer weather. Above 50s°F noted in April are replaced by balmy highs of 61.9°F (16.6°C). The month bids farewell to snowfall, setting the stage for uninterrupted rainfall periods. Weather in May »
Weather in June
June showcases a significant departure from spring and welcomes the summer season in Spearfish. With the highest average temperature documented at 74.8°F (23.8°C), the landscape experiences bountiful sunshine hours. The dwindling rainfall presents the opportunity for outdoor enthusiasts to relish in the city's natural beauty. Weather in June »
Weather in July
With temperatures peaking at 83.8°F (28.8°C), July typically reveals the epitome of summer in Spearfish. The city experiences almost no rainfall, contributing to several dry and sunny days. Longer daylight hours and diminished wind speeds accentuate the balmy appeal of the month. Weather in July »
Weather in August
As Spearfish advances towards the end of the summer season, August retains most of July’s warmth with an average high temperature of 81.9°F (27.7°C). By comparison, this peak summer month is slightly cooler and rainier than its predecessor. Weather in August »
Weather in September
September's weather lays the groundwork for autumn's arrival in Spearfish. At 72.5°F (22.5°C), this transitional month ushers in cooler temperatures without surrendering summer's residual warmth completely. Rainfall takes a slight dip compared to August, marking a slow return to drier conditions. Weather in September »
Weather in October
October sees Spearfish gradually transitioning into a colder climate, with temperature highs dropping to a cool 54.5°F (12.5°C). The month initiates the return of snowfall, albeit small amounts, indicating winter's not-so-distant approach. Weather in October »
Weather in November
The arrival of November in Spearfish announces the transition from fall to winter. The average high temperature drops further to 43.5°F (6.4°C) signaling the decrease in warmth. Snowfall becomes more abundant, reminiscent of the upcoming winter season. Weather in November »
Weather in December
December serves as the gateway to winter in Spearfish with average high temperatures hovering around a chilly 30.9°F (-0.6°C). The culmination of the year witnesses a noticeable spike in snowfall, painting the city white. Reduced daylight and the dwindling number of sunny days upholster the crisp and cold conditions. Weather in December »
Updated: Feb 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the most humid month in Spearfish?
The most humid month in Spearfish is January, with an average relative humidity of 79%.
What is the driest month in Spearfish?
January is the month with the least rainfall. Rain falls for 3 days and accumulates 0.59" (15mm) of precipitation.
How much does it rain in Spearfish?
Throughout the year, there are 99.6 rainfall days, and 15.63" (397mm) of precipitation is accumulated.
When does it snow in Spearfish?
Months with snowfall in Spearfish, South Dakota, are January through May, September through December.
How many days does it snow in Spearfish?
Throughout the year, there are 56.8 snowfall days, and 36.3" (922mm) of snow is accumulated.
What are the months with the lowest UV index in Spearfish?
The months with the lowest UV index in Spearfish, South Dakota, are January, February, April, November and December, with an average maximum UV index of 2.
What is the month with the least sunshine in Spearfish?
The month with the least sunshine is February, with an average of 5.7h of sunshine.
When is Daylight Saving Time (DST) in Spearfish?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Spearfish, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the snowiest month in Spearfish?
April is the month with the most snowfall in Spearfish, South Dakota. Snow falls for 6 days and accumulates 7.36" (187mm) of snow.
What is the rainiest month in Spearfish?
The month with the most rainfall is May, when the rain falls for 15.6 days and typically aggregates up to 2.32" (59mm) of precipitation.
When it does not snow in Spearfish?
In Spearfish, South Dakota, snow does not fall in June through August.
When are the longest days in Spearfish?
June has the longest days of the year in Spearfish, with an average of 15h and 30min of daylight.
What are the warmest months in Spearfish?
Spearfish's warmest weather arrives in July, when temperatures average a high of 83.8°F (28.8°C) and a low of 61°F (16.1°C).
What is the month with the highest UV index in Spearfish?
The month with the highest UV index in Spearfish is July, with an average maximum UV index of 6.
What is the least humid month in Spearfish?
With an average relative humidity of 49%, August is the least humid month.
What month has the most sunshine in Spearfish?
August has the most sunshine of the year, with an average of 11.7h of sunshine.
What is the coldest month in Spearfish?
With average temperatures fluctuating between a high of 30.9°F (-0.6°C) and a low of 18.5°F (-7.5°C), December stands out as the coldest month.
What is the month with the shortest days in Spearfish?
The month with the shortest days in Spearfish, South Dakota, is December, with an average of 8h and 54min of daylight.
Average temperature
Spearfish, SD
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (30.9°F).
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure
Spearfish, SD
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Spearfish, SD
- Average wind speed in January:
10.2mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
8.1mph - Average wind speed in August:
8mph - Average wind speed in September:
8.8mph - Average wind speed in October:
10.1mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity
Spearfish, SD
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (49%).
Average rainfall
Spearfish, SD
- Average rainfall in January:
0.59" - Average rainfall in February:
0.75" - Average rainfall in March:
1.18" - Average rainfall in April:
2.01" - Average rainfall in May:
2.32" - Average rainfall in June:
1.81"
- Average rainfall in July:
1.69" - Average rainfall in August:
1.54" - Average rainfall in September:
0.79" - Average rainfall in October:
1.5" - Average rainfall in November:
0.75" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days
Spearfish, SD
- Average rainfall days in January:
3 days - Average rainfall days in February:
2.9 days - Average rainfall days in March:
7.2 days - Average rainfall days in April:
12.1 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
13 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
7.6 days - Average rainfall days in October:
8.1 days - Average rainfall days in November:
3.5 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (2.9 days).
Average snowfall
Spearfish, SD
- Average snowfall in January:
3.31" - Average snowfall in February:
5.04" - Average snowfall in March:
5.24" - Average snowfall in April:
7.36" - Average snowfall in May:
2.64" - Average snowfall in June:
0"
The month with the highest snowfall is April (7.36").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Spearfish, SD
- Average snowfall days in January:
9.7 days - Average snowfall days in February:
11.2 days - Average snowfall days in March:
8 days - Average snowfall days in April:
6 days - Average snowfall days in May:
2.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
4.1 days - Average snowfall days in November:
6.5 days - Average snowfall days in December:
9 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Spearfish, SD
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
5h and 5min - Average sunshine in February:
5h and 4min - Average sunshine in March:
7h and 3min - Average sunshine in April:
9h and 1min - Average sunshine in May:
10h and 0min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 4min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 4min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days
Spearfish, SD
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
13.7 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
14.6 days - Average sunshine days in September:
20.1 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
20.3 days - Average sunshine days in December:
19.9 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (12.7 days).
Average UV index
Spearfish, SD
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, April, November and December (UV index 2).
Average cloud cover
Spearfish, SD
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility
Spearfish, SD
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Spearfish, South Dakota, USA
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