Climate and monthly weather forecast
Post Falls, ID

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Corbin Park on the banks of the Spokane River flowing downstream in Post Falls, Idaho, USA
Corbin Park on the banks of the Spokane River flowing downstream in Post Falls, Idaho, USA

The climate of Post Falls

Geographically positioned in Idaho, USA, Post Falls experiences a predominant Köppen climate classification of Csb. This represents a Mediterranean climate with warm summers. The yearly weather pattern in Post Falls includes a range of climatological factors.

Focusing on temperature, the coolest and warmest months are January and July respectively. Temperatures usually drop to 21.2°F (-6°C) in January while they soar up to 82°F (27.8°C) in July. Over the year, the variation in temperatures is reflective of the weather disparity.

Rainfall shows up across all months, with the wettest month being December at 3.15" (80mm). The driest month shows up in July, presenting merely 0.43" (11mm) rainfall. Post Falls experiences snowfall mostly in winter months, with the highest level of snowfall seen in January at 16.57" (421mm).

The community enjoys optimum daylight hours during June, with the duration stretching up to 15.9 hours. Various weather components paint a vivid picture of Post Falls and play a significant role in determining the best time for visitation.

The best time to visit Post Falls

Considering the diversity of weather conditions, the period between May to August appears to be an ideal time to visit Post Falls. The temperatures during this period range from 52.5°F (11.4°C) to 82°F (27.8°C), making the weather warm but not excessively hot.

Coinciding with these comfortable temperatures, the community enjoys extended daylight hours from 13.7 hours in May to 15.5 hours in July. Importantly, rainfall is least from June to August with a minimum value of 0.43" (11mm), making it less probable to experience weather interruptions during outdoor activities.

The worst time to visit Post Falls

The harshness of winter in Post Falls restricts outdoor activities, making the months between December to February less enticing for tourists. With temperatures plunging to 21.2°F (-6°C) in January and snowfall approximating to 16.57" (421mm) in the same month, winter conditions can be quite severe.

Visibility during winter is compromised, descending to 3 miles in December and January. These conditions coupled with limited daylight hours of 8.5 hours in December make winter a challenging season for visiting Post Falls.

Spring weather in Post Falls

Springtime in Post Falls extends from March to May. The temperatures steadily rise, moving from 43.2°F (6.2°C) in March to a high of 64.8°F (18.2°C) in May. An increase in daylight hours from 11.9 hours in March to 15.2 hours in May enhances outdoor activities.

Spring also sees a drop in rainfall, moving from 2.68" (68mm) in March to 1.77" (45mm) in May. Therefore, this season offers a balance between moderate temperatures and diminished rainfall, making it an enjoyable period in Post Falls.

Summer weather in Post Falls

Summer in Post Falls showcases a blend of long, sunny days and less rainfall. Temperatures during this time range from 70.2°F (21.2°C) in June to a high of 82°F (27.8°C) in July and August.

Daylight hours peak in June at 15.9 hours, slowly decreasing to 14.2 hours by August. Consistent with summer characteristics, the rainfall hits the lowest mark from June to August exhibiting a minimum of 0.43" (11mm).

Autumn weather in Post Falls

Autumn presents a cooling trend from September to November, with temperatures dropping from 71.4°F (21.9°C) in September to a chilly 40.5°F (4.7°C) in November. Humidity levels also increase, raising chances of fog or mist.

Rainfall progressively increases through autumn, with November recording a high of 2.28" (58mm). Despite these conditions, the moderate temperature range can offer a different type of appeal to some visitors.

Winter weather in Post Falls

Winter in Post Falls is characterized by cold temperature and frequent snowfall. The period spans from December to February with temperatures as low as 21.2°F (-6°C) in January.

The snowfall level significantly increases during winter, peaking at 16.57" (421mm) in January. Visibility reduces during winter, matching the reduced daylight hours, which bottom out at 8.5 hours during December. This season is reflective of the typical winter features of a Mediterranean climate.

Weather in January

January ushers in the coldest temperatures in Post Falls, Idaho, with the lowest average low of 21.6°F (-5.8°C). This month is known for its constant snowfall, clear nights showing off brilliant constellations, and shimmering icy landscapes under the crisp winter sun. Weather in January »

Weather in February

As February takes over from January, the city of Post Falls bargains a slight respite from the frigid weather while still staying on the colder side. Snow remains a frequent visitor this month; however, the amount of snowfall sees a considerable decrease from the previous month. Weather in February »

Weather in March

March in Post Falls delights its inhabitants with clear signals of the impending spring, involving a tangible rise in temperature. A significant reduction in snowfall from 12.24" (311mm) in February to 6.69" (170mm) is noteworthy, indicating the city's transition into warmer weather. Weather in March »

Weather in April

April paints the cityscape of Post Falls in the vibrant colors of spring, with temperatures ranging from 32.9°F (0.5°C) to 52.5°F (11.4°C). A notable decrease in the average snowfall to 1.61" (41mm) witnesses the last remnants of winter disappearing. Weather in April »

Weather in May

May welcomes summer with an increase in temperature, rendering the weather in Post Falls quite pleasant. The remnants of April's rains give way to dry spells, enhancing the warmth and inviting residents to enjoy the outdoors. It also marks the disappearance of snowfall, with an average of only 0.08" (2mm). Weather in May »

Weather in June

June brings a full-blown summer in Post Falls, favoring outdoor activities and leisure. Compared to May, daytime temperatures increase significantly, and the city experiences longer daylight hours. June also witnesses the reduction in snowfall to non-existent levels and decreased rainfall, resulting in dry and agreeable weather. Weather in June »

Weather in July

July, the warmest month of the year, enhances the summer vibes in Post Falls with a high average temperature soaring to 81.9°F (27.7°C). The maximum recorded UV index for Post Falls is seen this month, urging residents to take sun protection measures during outdoor activities. Weather in July »

Weather in August

In Post Falls, August maintains the warmth from July but with a minimal reduction in temperature. The city's landscapes continue to bask in glorious sunshine, with daylight hours decreasing slightly. August also signifies the end of the summer peak, with residents maximising on outdoor events before fall arrives. Weather in August »

Weather in September

September in Post Falls brings in the beautiful hues of fall with a visible drop in temperature. This month records a decrease in the temperature high to 71.4°F (21.9°C) from the scorching 82°F (27.8°C) in August. The city witnesses a short-lived resurgence in rainfall before the drier months of October and November, enhancing the rich autumn colors. Weather in September »

Weather in October

October in Post Falls ushers in the distinct chill of fall, preparing residents for the forthcoming winter. This month observes a further decline in temperature, with more rainy days than September. The landscape is covered in a riot of fall colors, making it a pleasant view for residents and visitors alike. Weather in October »

Weather in November

November nudges Post Falls deeper into winter, with dropping temperatures and increasing snowfall. November outpaces October by showing an increase in snowfall from 0.43" (11mm) to 4.92" (125mm). The city shrouds itself in a winter blanket, with residents enjoying the first heavy snowfall of the season. Weather in November »

Weather in December

December plunges Post Falls into the peak of winter with its coldest temperatures and heaviest snowfall. This month registers a significant jump in snowfall, starkly contrasting November's 4.92" (125mm) with its own hefty 13.66" (347mm). Weather in December »

Frequently asked questions

What is the most humid month?

The most humid month is January, with an average relative humidity of 93%.

What is the rainiest month?

January is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.27" (83mm) of precipitation.

How many days does it rain?

Throughout the year, there are 141.2 rainfall days, and 22.6" (574mm) of precipitation is accumulated.

When does it snow?

January through May, September through December are months with snowfall.

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 16.4 days and accumulates 16.57" (421mm) of snow.

How much does it snow?

Throughout the year, there are 71.8 snowfall days, and 56.54" (1436mm) of snow is accumulated.

What is the month with the lowest UV index?

The months with the lowest UV index are February, November and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow?

June through August are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 54min of daylight.

What is the driest month?

The months with the least rainfall in Post Falls are July and August Rain falls for 5.8 days and accumulates 0.43" (11mm) of rain.

What is the month with the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 6.

What month is the hottest?

The warmest period tends to be August, when average temperatures fluctuate between a high of 82°F (27.8°C) and a low of 51.8°F (11°C).

What is the least humid month?

August is the least humid month, with an average relative humidity of 48%.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 11.9h of sunshine.

What is the coldest month?

Post Falls's December weather, with an average high temperature of 31.3°F (-0.4°C) and an average low temperature of 21.2°F (-6°C), tends to be the coldest of the year.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 30min of daylight.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 3.4h of sunshine.

Average temperature
Post Falls, ID

Average temperature - Post Falls, ID

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (31.3°F).

The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).

Average pressure
Post Falls, ID

Average pressure - Post Falls, ID

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

Average wind speed
Post Falls, ID

Average wind speed - Post Falls, ID

The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is December (3.9mph).

Average humidity
Post Falls, ID

Average humidity - Post Falls, ID

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (48%).

Average rainfall
Post Falls, ID

Average rainfall - Post Falls, ID

The wettest month (with the highest rainfall) is January (3.27").
The driest months (with the least rainfall) are July and August (0.43").

Average rainfall days
Post Falls, ID

Average rainfall days - Post Falls, ID

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (5.6 days).

Average snowfall
Post Falls, ID

Average snowfall - Post Falls, ID

The month with the highest snowfall is January (16.57").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Post Falls, ID

Average snowfall days - Post Falls, ID

The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Post Falls, ID

Average daylight / Average sunshine - Post Falls, ID

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).

Average sunshine days
Post Falls, ID

Average sunshine days - Post Falls, ID

The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.6 days).

Average UV index
Post Falls, ID

Average UV index - Post Falls, ID

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).

Average visibility
Post Falls, ID

Average visibility - Post Falls, ID

The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).

Post Falls, Idaho, USA

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