Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The transition into January shows a subtle variation to a still frosty 47.7°F (8.7°C) from December's 46.8°F (8.2°C) in the average high-temperature. In Chinook, the nighttime temperature shows a slight difference from the daytime high, averaging to a wintry 42.1°F (5.6°C) during January.Humidity
In Chinook, the average relative humidity in January is 81%.Rainfall
In Chinook, in January, during 16.8 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in Chinook, there are 165.1 rainfall days, and 19.92" (506mm) of precipitation is accumulated.Snowfall
January, February and September are months with snowfall. January is the first month it typically snows. Throughout January, in the average 0.4 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 1.8 snowfall days, and 0.47" (12mm) of snow is accumulated.Daylight
In Chinook, the average length of the day in January is 9h and 7min.On the first day of the month, sunrise is at 7:58 am and sunset at 4:39 pm. On the last day of January, sunrise is at 7:39 am and sunset at 5:18 pm PST.
Sunshine
With an average of 3.8h of sunshine, January has the least sunshine of the year.UV index
In Chinook, Washington, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In January, a daily maximum UV index of 3 leads to the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
How many days does it rain in January?
When does it start snowing?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the UV index intensity in January in Chinook?
Average temperature in January
Chinook, WA
- Average high temperature in January: 47.7°F
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
- Average low temperature in January: 42.1°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure in January
Chinook, WA
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in January
Chinook, WA
- Average wind speed in January: 11.9mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in January
Chinook, WA
- Average humidity in January: 81%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall in January
Chinook, WA
- Average rainfall in January: 2.8"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in January
Chinook, WA
- Average rainfall days in January: 16.8 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in January
Chinook, WA
- Average snowfall in January: 0.12"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days in January
Chinook, WA
- Average snowfall days in January: 0.4 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Chinook, WA
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in January
Chinook, WA
- Average sunshine days in January: 12.4 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in January
Chinook, WA
- Average UV index in January: 3
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in January
Chinook, WA
- Average cloud cover in January: 60
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in January
Chinook, 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).
Chinook, Washington, USA
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