Climate and monthly weather forecast
Custer, WA

Weather in January

January is a chilly winter month in Custer, Washington, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 43.3°F (6.3°C). In January, the average high-temperature is almost the same as in December - a chilly 43.3°F (6.3°C). Weather in January »

Weather in February

The last month of the winter, February, is another chilly month in Custer, Washington, with an average temperature fluctuating between 44.1°F (6.7°C) and 35.8°F (2.1°C). In February, the average high-temperature is relatively the same as in January - a still chilly 44.1°F (6.7°C). Weather in February »

Weather in March

March, the first month of the spring in Custer, is also a frosty month, with an average temperature varying between 48.4°F (9.1°C) and 38.8°F (3.8°C). In Custer, Washington, the average high-temperature in March is essentially the same as in February - a still frosty 48.4°F (9.1°C). Weather in March »

Weather in April

April is a fresh spring month in Custer, Washington, with an average temperature fluctuating between 54.1°F (12.3°C) and 41.9°F (5.5°C). In Custer, Washington, the average high-temperature in April marginally rises from a chilly 48.4°F (9.1°C) in March to a fresh 54.1°F (12.3°C). Weather in April »

Weather in May

May, the last month of the spring in Custer, is a comfortable month, with an average temperature varying between 46.6°F (8.1°C) and 61.7°F (16.5°C). In Custer, the average high-temperature in May slightly increases from a cool 54.1°F (12.3°C) in April to an enjoyable 61.7°F (16.5°C). Weather in May »

Weather in June

June, the first month of the summer in Custer, is still a comfortable month, with an average temperature ranging between max 64.9°F (18.3°C) and min 50.2°F (10.1°C). In Custer, the average high-temperature in June is relatively the same as in May - a still comfortable 64.9°F (18.3°C). Weather in June »

Weather in July

July in Custer, Washington, is a pleasant summer month, with an average temperature fluctuating between 53.4°F (11.9°C) and 69.8°F (21°C). In Custer, the average high-temperature in July is essentially the same as in June - an agreeable 69.8°F (21°C). Weather in July »

Weather in August

August, the last month of the summer in Custer, is another pleasant month, with an average temperature ranging between min 54.9°F (12.7°C) and max 70°F (21.1°C). The warmest month is August, with an average high-temperature of 70°F (21.1°C) and an average low-temperature of 54.9°F (12.7°C). Weather in August »

Weather in September

September, the first month of the autumn in Custer, is still a comfortable month, with an average temperature ranging between min 52°F (11.1°C) and max 64.8°F (18.2°C). In Custer, Washington, the average high-temperature in September is almost the same as in August - a comfortable 64.8°F (18.2°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Custer, Washington, with an average temperature ranging between max 55.9°F (13.3°C) and min 46°F (7.8°C). In Custer, the average high-temperature in October slightly decreases from a comfortable 64.8°F (18.2°C) in September to a moderate 55.9°F (13.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Custer, Washington, with temperature in the range of an average low of 41°F (5°C) and an average high of 47.7°F (8.7°C). In Custer, the average high-temperature in November slightly decreases from a moderate 55.9°F (13.3°C) in October to a frosty 47.7°F (8.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Custer, Washington, with an average temperature ranging between min 36°F (2.2°C) and max 41.9°F (5.5°C). December is the coldest month, with an average high-temperature of 41.9°F (5.5°C) and an average low-temperature of 36°F (2.2°C). Weather in December »
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FAQ

What is the most humid month in Custer?

January and November, with an average relative humidity of 83%, are most humid months.

How many days does it rain in Custer?

In Custer, Washington, during the entire year, the rain falls for 176.1 days and collects up to 43.78" (1112mm) of precipitation.

When does it snow in Custer?

Months with snowfall in Custer are January through April, November and December.

How many days does it snow in Custer?

In Custer, Washington, during the entire year, snow falls for 10.5 days and aggregates up to 6.77" (172mm) of snow.

What are the months with the least sunshine in Custer?

January and December, with an average of 3.9h of sunshine, are months with the least sunshine.

When is the lowest UV index in Custer?

The months with the lowest UV index in Custer, Washington, are January, February, November and December, with an average maximum UV index of 2.

When does it snow the most in Custer?

February is the month with the most snowfall in Custer. Snow falls for 3.7 days and accumulates 2.05" (52mm) of snow.

When is Daylight Saving Time (DST) in Custer?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Custer, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Custer?

May through October are months without snowfall in Custer, Washington.

When are the longest days in Custer?

June has the longest days of the year, with an average of 16h and 7min of daylight.

What are the months with the highest UV index in Custer?

The months with the highest UV index in Custer, Washington, are June and July, with an average maximum UV index of 5.

What is the least humid month in Custer?

The least humid month is July, with an average relative humidity of 74%.

What is the driest month in Custer?

July is the month with the least rainfall in Custer. Rain falls for 7.3 days and accumulates 0.67" (17mm) of precipitation.

What are the months with the most sunshine in Custer?

The months with the most sunshine in Custer are July and August, with an average of 10.4h of sunshine.

What is the warmest month in Custer?

The warmest month in Custer is August, with an average high-temperature of 70°F (21.1°C) and an average low-temperature of 54.9°F (12.7°C).

What is the rainiest month in Custer?

November is the month with the most rainfall in Custer. Rain falls for 19.7 days and accumulates 7.13" (181mm) of precipitation.

What is the coldest month in Custer?

The coldest month in Custer is December, with an average high-temperature of 41.9°F (5.5°C) and an average low-temperature of 36°F (2.2°C).

What is the month with the shortest days in Custer?

December has the shortest days of the year, with an average of 8h and 19min of daylight.

Average temperature
Custer, WA

Average temperature - Custer, WA

The warmest month (with the highest average high temperature) is August (70°F).
The month with the lowest average high temperature is December (41.9°F).

The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is February (35.8°F).

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Average pressure
Custer, WA

Average pressure - Custer, WA

The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).

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Average wind speed
Custer, WA

Average wind speed - Custer, WA

The windiest months (with the highest average wind speed) are November and December (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity
Custer, WA

Average humidity - Custer, WA

The months with the highest relative humidity are January and November (83%).
The month with the lowest relative humidity is July (74%).

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Average rainfall
Custer, WA

Average rainfall - Custer, WA

The wettest month (with the highest rainfall) is November (7.13").
The driest month (with the least rainfall) is July (0.67").

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Average rainfall days
Custer, WA

Average rainfall days - Custer, WA

The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall
Custer, WA

Average snowfall - Custer, WA

The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Custer, WA

Average snowfall days - Custer, WA

The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Custer, WA

Average daylight / Average sunshine - Custer, WA

The month with the longest days is June (Average daylight: 16h and 7min).
The month with the shortest days is December (Average daylight: 8h and 19min).

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).

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Average sunshine days
Custer, WA

Average sunshine days - Custer, WA

The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is November (8.8 days).

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Average UV index
Custer, WA

Average UV index - Custer, WA

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Custer, WA

Average visibility - Custer, WA

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).

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