Climate and monthly weather forecast
Kasaan, AK

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The climate of Kasaan

Kasaan, Alaska lies within the Cfb category of the Köppen climate classification, which corresponds to the marine west coast, warm summer climate type. This specific climatological zone typically signifies moderate temperatures and ample precipitation year-round.

While examining the climate tidings for Kasaan, it becomes clear that the town experiences a gentle swing between temperature highs of 59.7°F (15.4°C) in July and August, to lows of 33.3°F (0.7°C) in February. Humidity parameters fluctuate subtly, attaining the highest levels of 87% in August and dipping to a standstill at 80% in March.

Changes in the volume of precipitation prove to be more visible. An annual pattern sees monthly rainfall in Kasaan ranging from 9.29" (236mm) in November to 2.91" (74mm) in May. Similarly, snowfall is very dependent on the time of the year - no snow is recorded from June to October, while January and February lead the snow charts with 10.59 and 10.75" (273mm) respectively.

The daylight exposure also follows a predictable cycle - a daylight high of 17.4 hours in June gradually diminishes to a minimum of 7.2 hours by December. The town's average wind speed gently oscillates between 10.4mph (16.7km/h) in January and 6.3mph (10.1km/h) in July and August.

The best time to visit Kasaan

When it comes to the optimal time for a visit to Kasaan, it appears to fall between May and August. The mid-year period promises the most comfortable temperatures, diving from a high of 52.3°F (11.3°C) in May to a comfortable 59.7°F (15.4°C) in August. Concurrently, the town revels in the highest sunshine hours, scaling at 7.3 hours in May. Rainfall, however, picks up during these months, although it is the lowest of the year in May at 2.91" (74mm).

The worst time to visit Kasaan

On the other end of the spectrum, the months between November and January can prove challenging to visitors. With snowfall values soaring to near 10.75" (273mm) and temperatures sliding to their annual minimums, outdoor activities can be severely limited. Furthermore, the town sees the shortest daylight hours during these months, with a marginal 7.2 hours on offer in December.

Spring weather in Kasaan

Spring in Kasaan, spanning from March to May, witnesses a gradual and steady climb in temperatures, rising from 41.2°F (5.1°C) to a comforting 52.3°F (11.3°C) by the end of May. Concurrently, the daylight hours increase siginificantly, reaching 16.3 hours by May end. Rainfall, however, escalates during this period, although it remains below the annual averages.

Summer weather in Kasaan

June through August marks the summer season in Kasaan. Welcoming the highest temperatures of the year, Kasaan summer averages 59.4°F (15.2°C) in June and reaches a peak of 59.7°F (15.4°C) in August. Notably, daylight hours in this period touch the highest annual mark, with 17.4 hours registered in June.

Autumn weather in Kasaan

Autumn ushers in a cooling effect in Kasaan as the town transitions from summer to winter. The span of September to November is marked by a notable plunge in temperatures from a balmy 55.6°F (13.1°C) to 42.4°F (5.8°C). Despite this, the town retains a decent amount of daylight, clocking an average of 8.3 hours in November.

Winter weather in Kasaan

From December through February, Kasaan grapples with the freezing winter conditions. Temperatures drop down to 33.3°F (0.7°C) in February, while heavy blankets of snow envelop the town, recording high values of 10.75" (273mm) in February. Daylight hours also take a hit, descending to the annual minimum of 7.2 hours in December. Despite the harsh conditions, the winter holds a distinct charm for those willing to brave the cold.

Weather in January

January in Kasaan, Alaska, proves chilly with its temperature highs hitting 38.3°F (3.5°C) and dipping to lows of 34.5°F (1.4°C). The first month of the year experiences a primarily cloudy atmosphere, which contributes to a higher probability of rain and snow showers. Weather in January »

Weather in February

February's weather in Kasaan carries over the chill from January, albeit with a slight drop in temperatures. These wintry conditions are coupled with mildly reduced cloud coverage, giving a brighter although colder sense to the city. Weather in February »

Weather in March

Despite a minor rise in temperature to 41.2°F (5.1°C) high and 35.1°F (1.7°C) low, March predominantly exhibits winter conditions in Kasaan, Alaska. The city experiences fewer cloudy days and increased sunlight exposure. This added sunlight does not significantly affect temperatures due to the continued presence of cold fronts. Weather in March »

Weather in April

April in Kasaan is the transitional phase from winter to spring with temperature highs climbing to 45.5°F (7.5°C). There's a noticeable shift in the weather conditions with diminishing snowfall. The outlook brightens with extended daylight hours, promoting increased outdoor activity. Weather in April »

Weather in May

May brings a breath of fresh spring air to Kasaan, with high temperatures soaring to 52.3°F (11.3°C). The weather conditions improve with increased daylight, while snowfall virtually vanishes. The city witnesses sprouting greenery, hinting at the arrival of summer. Weather in May »

Weather in June

June showcases the onset of summer in Kasaan with the mercury rising to a comfortable 55.8°F (13.2°C) during afternoons. Weather conditions lean towards the drier side, with the raining season tapering off. However, the relief from snowfall extends through June, keeping the city weather comfortable and sunny. Weather in June »

Weather in July

July signifies a full-fledged summer for Kasaan, Alaska. The city basks under the sun as high temperatures soar to 59.4°F (15.2°C). The considerable reduction in rainfall events during this month contributes to comfortable, dry, and sunny weather conditions. Weather in July »

Weather in August

The month of August maintains summer-like conditions in Kasaan, with daily high temperatures peaking at 59.7°F (15.4°C). There persists an increase in rainfall reaching 6.97" (177mm), bringing frequent light showers. However, these rain events do not significantly impact the overall pleasant weather and outdoor activities. Weather in August »

Weather in September

September marks the descent of temperature highs to 55.6°F (13.1°C), indicating the onset of Fall in Kasaan. Despite a drop in temperatures, the City remains vibrant against the backdrop of unique Fall foliage. The weather conditions see an uptick in rainfall at 7.24" (184mm), marking the arrival of the wet season. Weather in September »

Weather in October

October welcomes more noticeable autumnal conditions in Kasaan, with temperatures gradually dropping to 49.1°F (9.5°C). The city experiences an increased rainfall volume, contributing to the chilly, damp conditions typical of the fall season. Weather in October »

Weather in November

November in Kasaan, Alaska, experiences a sharp drop in temperatures with highs reaching only 42.4°F (5.8°C). This time is marked by the first signs of the approaching winter, with rainfall gradually turning into snowfall. The onset of snowfall reaches 4.72" (120mm), adding an element of winter charm to the city. Weather in November »

Weather in December

December brings the full effect of winter in Kasaan, with more frequent snowfall and an average high temperature of 38.1°F (3.4°C). The city transforms into a winter wonderland, making it a great time for winter sports and activities. Weather in December »

Frequently asked questions

How much does it rain?

Throughout the year, there are 219.6 rainfall days, and 79.29" (2014mm) of precipitation is accumulated.

When does it snow?

January through May, November and December are months with snowfall.

How much does it snow?

Throughout the year, in Kasaan, there are 45.8 snowfall days, and 47.48" (1206mm) of snow is accumulated.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 2.8h of sunshine.

What is the month with the lowest UV index?

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

What is the least humid month?

The least humid month is March, with an average relative humidity of 80%.

When does it snow the most?

The month with the most snowfall is March, when snow falls for 10.8 days and typically aggregates up to 10.94" (278mm) of snow.

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 AKST to AKDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from AKDT to AKST.

What is the driest month?

The month with the least rainfall is May, when the rain falls for 15.8 days and typically collects 2.91" (74mm) of precipitation.

What month has the most sunshine?

With an average of 7.3h of sunshine, May has the most sunshine of the year.

When it does not snow?

June through October are months without snowfall.

When are the longest days?

With an average of 17h and 24min of daylight, June has the longest days of the year.

What are the months with the highest UV index?

July and August, with an average maximum UV index of 4, are months with the highest UV index.

What month is the hottest?

August is the warmest month, with the temperature often reaching an average high of 59.7°F (15.4°C) and an average low of 54°F (12.2°C).

What is the most humid month?

August is the most humid month, with an average relative humidity of 87%.

What is the rainiest month in Kasaan?

The month with the most rainfall is November, when the rain falls for 21.2 days and typically aggregates up to 9.29" (236mm) of precipitation.

What are the coldest months in Kasaan?

December is the coldest month, with an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 34°F (1.1°C).

What is the month with the shortest days in Kasaan?

December has the shortest days of the year, with an average of 7h and 12min of daylight.

Average temperature
Kasaan, AK

Average temperature - Kasaan, AK

The warmest month (with the highest average high temperature) is August (59.7°F).
The month with the lowest average high temperature is December (38.1°F).

The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is February (33.3°F).

Average pressure
Kasaan, AK

Average pressure - Kasaan, AK

The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.79"Hg).

Average wind speed
Kasaan, AK

Average wind speed - Kasaan, AK

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).

Average rainfall
Kasaan, AK

Average rainfall - Kasaan, AK

The wettest month (with the highest rainfall) is November (9.29").
The driest month (with the least rainfall) is May (2.91").

Average rainfall days
Kasaan, AK

Average rainfall days - Kasaan, AK

The month with the highest number of rainy days is October (21.4 days).
The month with the least rainy days is February (13.8 days).

Average snowfall
Kasaan, AK

Average snowfall - Kasaan, AK

The month with the highest snowfall is March (10.94").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Kasaan, AK

Average snowfall days - Kasaan, AK

The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Kasaan, AK

Average daylight / Average sunshine - Kasaan, AK

The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 12min).

The month with the most sunshine is May (Average sunshine: 7h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

Average sunshine days
Kasaan, AK

Average sunshine days - Kasaan, AK

The month with the most sunshine days is May (13.6 days).
The month with the least sunshine days is November (5.8 days).

Average UV index
Kasaan, AK

Average UV index - Kasaan, AK

The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).

Average visibility
Kasaan, AK

Average visibility - Kasaan, AK

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).

Kasaan, Alaska, USA

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