January weather forecast
Chehalis, WA

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Weather in January

January is a frosty winter month in Chehalis, Washington, with temperature in the range of an average low of 33.8°F (1°C) and an average high of 44.6°F (7°C).

Temperature

A minor adjustment in Chehalis's average high-temperature is noted with the start of January, touching a chilly 44.6°F (7°C) from December's 42.6°F (5.9°C). An average low-temperature of 33.8°F (1°C) is observed in Chehalis during the January nights.

Humidity

The months with the highest humidity are January, February, November and December, with an average relative humidity of 89%.

Rainfall

The month with the most rainfall in Chehalis is January, when the rain falls for 18.6 days and typically aggregates up to 5.51" (140mm) of precipitation.

Snowfall

Months with snowfall in Chehalis are January through March, November and December. In Chehalis, in January, during 1.8 snowfall days, 1.85" (47mm) of snow is typically accumulated. Throughout the year, there are 9 snowfall days, and 5.59" (142mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 4min.
On the first day of January in Chehalis, 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

In Chehalis, Washington, 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 in Chehalis. 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: In January, the average maximum UV index of 2 translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

Is it cold in Chehalis during January?

In January, in Chehalis, the average high-temperature is 44.6°F (7°C), and the average low-temperature is 33.8°F (1°C).

What are the most humid months in Chehalis?

January, February, November and December, with an average relative humidity of 89%, are most humid months.

What is the average humidity in January in Chehalis?

In Chehalis, Washington, the average relative humidity in January is 89%.

What is the wettest month in Chehalis?

January is the month with the most rainfall in Chehalis, Washington. Rain falls for 18.6 days and accumulates 5.51" (140mm) of precipitation.

How much does it rain in Chehalis in January?

In January, the rain falls for 18.6 days. Throughout January, 5.51" (140mm) of precipitation is accumulated.

How many days does it snow in January in Chehalis?

In January, in Chehalis, Washington, it is snowing for 1.8 days. Throughout January, 1.85" (47mm) of snow is accumulated.

How many hours of daylight does Chehalis have in January?

In January, the average day length in Chehalis is 9h and 4min.

When are sunrise and sunset in January in Chehalis?

On the first day of January in Chehalis, Washington, 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.

How many hours of sunshine does Chehalis have in January?

In Chehalis, the average sunshine duration in January is 3.6h.

What is the month with the lowest UV index in Chehalis?

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

What is the UV index reading in January in Chehalis?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Chehalis, WA

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).

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Average pressure in January
Chehalis, WA

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).

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Average wind speed in January
Chehalis, WA

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).

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Average humidity in January
Chehalis, WA

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%).

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Average rainfall in January
Chehalis, WA

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").

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Average rainfall days in January
Chehalis, WA

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).

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Average snowfall in January
Chehalis, WA

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").

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Average snowfall days in January
Chehalis, WA

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).

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Average daylight in January /
Average sunshine in January
Chehalis, WA

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).

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Average sunshine days in January
Chehalis, WA

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).

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Average UV index in January
Chehalis, WA

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).

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Average cloud cover in January
Chehalis, WA

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).

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Average visibility in January
Chehalis, WA

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).

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Chehalis, Washington, USA

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