January weather forecast
Custer, WA

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Weather in January

January in Custer, Washington, is a chilly winter month, with an average temperature varying between 36.3°F (2.4°C) and 43.3°F (6.3°C).

Temperature

January's arrival shows an average high-temperature of a chilly 43.3°F (6.3°C), hardly different from the previous month. Custer in January observes a slight diminution in temperature from daily highs, recording a low-temperature average of 36.3°F (2.4°C).

Humidity

The months with the highest humidity in Custer are January and November, with an average relative humidity of 83%.

Rainfall

In Custer, in January, during 18.4 rainfall days, 6.26" (159mm) of precipitation is typically accumulated. Throughout the year, there are 176.1 rainfall days, and 43.78" (1112mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Custer, in January, snow falls for 2.3 days, with typically accumulated 1.89" (48mm) of snow. In Custer, Washington, during the entire year, snow falls for 10.5 days and aggregates up to 6.77" (172mm) of snow.

Daylight

In Custer, the average length of the day in January is 8h and 48min.
On the first day of the month, sunrise is at 8:04 am and sunset at 4:23 pm. On the last day of January, sunrise is at 7:42 am and sunset at 5:05 pm PST.

Sunshine

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

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 2 in January translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Frequently asked questions

How cold does it get in Custer in January?

During January, Custer experiences an average high-temperature of 43.3°F (6.3°C) and a low-temperature of 36.3°F (2.4°C).

What is the most humid month in Custer?

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

What is the average humidity in January in Custer?

The average relative humidity in January in Custer is 83%.

How many days does it rain in January in Custer?

In Custer, Washington, in January, it is raining for 18.4 days, with typically 6.26" (159mm) of accumulated precipitation.

How many days does it snow in January in Custer?

In Custer, during January, snow falls for 2.3 days and regularly aggregates up to 1.89" (48mm) of snow.

What is the average length of the day in January in Custer?

In January, the average day length is 8h and 48min.

When are sunrise and sunset in January in Custer?

On the first day of January in Custer, sunrise is at 8:04 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:05 pm PST.

What is the month with the least sunshine in Custer?

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

How many hours of sunshine does Custer have in January?

In January, the average sunshine duration in Custer, Washington, is 3.9h.

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

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

How high is the UV index in January in Custer?

In January, the average daily maximum UV index in Custer, Washington, is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Custer, WA

Average temperature in January - Custer, WA
  • Average high temperature in January: 43.3°F

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).

  • Average low temperature in January: 36.3°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 in January
Custer, WA

Average pressure in January - Custer, WA
  • Average pressure in January: 30.07"Hg

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 in January
Custer, WA

Average wind speed in January - Custer, WA
  • Average wind speed in January: 6.2mph

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 in January
Custer, WA

Average humidity in January - Custer, WA
  • Average humidity in January: 83%

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 in January
Custer, WA

Average rainfall in January - Custer, WA
  • Average rainfall in January: 6.26"

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 in January
Custer, WA

Average rainfall days in January - Custer, WA
  • Average rainfall days in January: 18.4 days

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 in January
Custer, WA

Average snowfall in January - Custer, WA
  • Average snowfall in January: 1.89"

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 in January
Custer, WA

Average snowfall days in January - Custer, WA
  • Average snowfall days in January: 2.3 days

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 in January /
Average sunshine in January
Custer, WA

Average daylight in January / Average sunshine in January - Custer, WA
  • Average daylight in January: 8h and 5min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in January: 3h and 5min

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 in January
Custer, WA

Average sunshine days in January - Custer, WA
  • Average sunshine days in January: 10.6 days

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 in January
Custer, WA

Average UV index in January - Custer, WA
  • Average UV index in January: 2

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 cloud cover in January
Custer, WA

Average cloud cover in January - Custer, WA
  • Average cloud cover in January: 58

The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in January
Custer, WA

Average visibility in January - Custer, WA
  • Average visibility in January: 6mi

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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Custer, Washington, USA

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