January weather forecastCoulee Dam, WA
January
Weather in January
January in Coulee Dam, Washington, is a cold winter month, with an average temperature ranging between min 21.9°F (-5.6°C) and max 32°F (0°C).Temperature
In the transition from December to January, Coulee Dam reports an average high-temperature of a wintry 32°F (0°C), indicating a close resemblance to the prior month. January nights in Coulee Dam are marked by an average low-temperature of 21.9°F (-5.6°C).Humidity
With an average relative humidity of 89%, January is the most humid month.Rainfall
In Coulee Dam, in January, during 9.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 102.1 rainfall days, and 9.65" (245mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall. The month with the most snowfall is January, when snow falls for 8.4 days and typically aggregates up to 4.41" (112mm) of snow.Daylight
In January, the average length of the day is 8h and 55min.On the first day of January, sunrise is at 7:45 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:53 pm PST.
Sunshine
The month with the least sunshine is January, with an average of 4.1h of sunshine.UV index
The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 during January translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Coulee Dam, WA
- Average high temperature in January: 32°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (31.6°F).
- Average low temperature in January: 21.9°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in January
Coulee Dam, WA
- Average pressure in January: 30.18"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Coulee Dam, WA
- Average wind speed in January: 4.9mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in January
Coulee Dam, WA
- Average humidity in January: 89%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (36%).
Average rainfall in January
Coulee Dam, WA
- Average rainfall in January: 1.14"
The wettest months (with the highest rainfall) are May and December (1.18").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in January
Coulee Dam, WA
- Average rainfall days in January: 9.7 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in January
Coulee Dam, WA
- Average snowfall in January: 4.41"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in January
Coulee Dam, WA
- Average snowfall days in January: 8.4 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Coulee Dam, WA
- Average daylight in January: 8h and 54min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 4h and 6min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Coulee Dam, WA
- Average sunshine days in January: 16 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is March (14.7 days).
Average UV index in January
Coulee Dam, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in January
Coulee Dam, WA
- Average cloud cover in January: 55
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in January
Coulee Dam, WA
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
