January weather forecast
Olympia, WA

The calm Capitol Lake overlooking the Washington State Capitol building in Olympia, Washington
The calm Capitol Lake overlooking the Washington State Capitol building in Olympia, Washington

Weather in January

January, like December, is another chilly winter month in Olympia, Washington, with an average temperature fluctuating between 44.6°F (7°C) and 34.3°F (1.3°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still chilly 44.6°F (7°C). In Olympia, the average low-temperature is 34.3°F (1.3°C).

Humidity

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

Rainfall

In January, in Olympia, the rain falls for 18.9 days. Throughout January, 5.71" (145mm) of precipitation is accumulated. In Olympia, during the entire year, the rain falls for 177.4 days and collects up to 37.05" (941mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Olympia, during 1.9 snowfall days, 1.38" (35mm) of snow is typically accumulated. In Olympia, during the entire year, snow falls for 8.7 days and aggregates up to 5.31" (135mm) of snow.

Daylight

In Olympia, the average length of the day in January is 9h and 1min.
On the first day of January in Olympia, sunrise is at 7:57 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:12 pm PST.

Sunshine

The average sunshine in January in Olympia is 3.5h.

UV index

The months with the lowest UV index in Olympia are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in January in Olympia?

In January, in Olympia, Washington, the average high-temperature is 44.6°F (7°C), and the average low-temperature is 34.3°F (1.3°C).

What is the most humid month in Olympia?

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

What is the average humidity in January in Olympia?

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

How much does it rain in Olympia in January?

In Olympia, in January, during 18.9 rainfall days, 5.71" (145mm) of precipitation is typically accumulated.

How many days does it snow in January in Olympia?

In Olympia, in January, during 1.9 snowfall days, 1.38" (35mm) of snow is typically accumulated.

How many hours of daylight does Olympia have in January?

The average day length in January in Olympia, Washington, is 9h and 1min.

When are sunrise and sunset in January in Olympia?

In January, on the first day of the month, sunrise is at 7:57 am and sunset at 4:33 pm. On the last day of the month, in Olympia, sunrise is at 7:37 am and sunset at 5:12 pm PST.

How long on average sun shines in January in Olympia?

In January, the average sunshine duration in Olympia is 3.5h.

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

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

How high is the UV index in January in Olympia?

In Olympia, Washington, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average high temperature
Average max. wind speed
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
Olympia, WA

Average temperature in January - Olympia, WA
  • Average high temperature in January: 44.6°F

The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in January: 34.3°F

The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).

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Average pressure in January
Olympia, WA

Average pressure in January - Olympia, WA
  • Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).

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Average wind speed in January
Olympia, WA

Average wind speed in January - Olympia, WA
  • Average wind speed in January: 4.5mph

The windiest months (with the highest average wind speed) are March and November (4.6mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).

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Average humidity in January
Olympia, WA

Average humidity in January - Olympia, WA
  • Average humidity in January: 89%

The months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is July (71%).

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Average rainfall in January
Olympia, WA

Average rainfall in January - Olympia, WA
  • Average rainfall in January: 5.71"

The wettest month (with the highest rainfall) is December (5.79").
The driest month (with the least rainfall) is July (0.39").

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Average rainfall days in January
Olympia, WA

Average rainfall days in January - Olympia, WA
  • Average rainfall days in January: 18.9 days

The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is August (5.5 days).

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Average snowfall in January
Olympia, WA

Average snowfall in January - Olympia, WA
  • Average snowfall in January: 1.38"

The month with the highest snowfall is February (2.32").
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
Olympia, WA

Average snowfall days in January - Olympia, WA
  • Average snowfall days in January: 1.9 days

The month with the highest number of snowfall days is February (3.3 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
Olympia, WA

Average daylight in January / Average sunshine in January - Olympia, WA
  • Average daylight in January: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 50min).
The month with the shortest days is December (Average daylight: 8h and 35min).

  • Average sunshine in January: 3h and 30min

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 24min).

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Average sunshine days in January
Olympia, WA

Average sunshine days in January - Olympia, WA
  • Average sunshine days in January: 9.8 days

The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.4 days).

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Average UV index in January
Olympia, WA

Average UV index in January - Olympia, 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
Olympia, WA

Average cloud cover in January - Olympia, WA
  • Average cloud cover in January: 65

The months with the most cloud cover are January and December (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 35).

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Average visibility in January
Olympia, WA

Average visibility in January - Olympia, WA
  • Average visibility in January: 4mi

The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (4mi).

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