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
January
Weather in January
Temperature
Chehalis sees the arrival of January with an average high-temperature of a chilly 44.6°F (7°C), indicating a subtle variation from December. Chehalis's temperature in January lowers to a consistent average of 33.8°F (1°C) during the nights.Humidity
The months with the highest humidity in Chehalis are January, February, November and December, with an average relative humidity of 89%.Rainfall
January is the month with the most rainfall in Chehalis, Washington. Rain falls for 18.6 days and accumulates 5.51" (140mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In January, it is snowing for 1.8 days. Throughout January, 1.85" (47mm) of snow is accumulated. Throughout the year, in Chehalis, there are 9 snowfall days, and 5.59" (142mm) of snow is accumulated.Daylight
In Chehalis, the average length of the day in January is 9h and 4min.On the first day of January, sunrise is at 7:56 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:13 pm PST.
Sunshine
The average sunshine in January is 3.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 2 in January leads to these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What are the most humid months?
What is the average humidity in January?
What is the rainiest month?
How many days does it rain in January?
How much does it snow in January?
How many hours of daylight does Chehalis have in January?
When are sunrise and sunset in January?
How many hours of sunshine does Chehalis have in January?
What are the months with the lowest UV index?
How high is the UV index in January in Chehalis?
Average temperature in January
Chehalis, WA
- Average high temperature in January: 44.6°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in January: 33.8°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in January
Chehalis, WA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed in January
Chehalis, WA
- Average wind speed in January: 4.5mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in January
Chehalis, WA
- Average humidity in January: 89%
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in January
Chehalis, WA
- Average rainfall in January: 5.51"
The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in January
Chehalis, WA
- Average rainfall days in January: 18.6 days
The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in January
Chehalis, WA
- Average snowfall in January: 1.85"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Chehalis, WA
- Average snowfall days in January: 1.8 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Chehalis, WA
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in January
Chehalis, WA
- Average sunshine days in January: 9.6 days
The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in January
Chehalis, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Chehalis, WA
- Average cloud cover in January: 65
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in January
Chehalis, WA
- Average visibility in January: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).