January weather forecast and climate
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, the same as December, in Olympia, Washington, is a frosty winter month, with average temperature varying between 34.3°F (1.3°C) and 44.6°F (7°C).

Temperature

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

Rainfall

In Olympia, it is raining for 18.9 days, with typically 5.71" (145mm) of accumulated precipitation. Throughout the year, in Olympia, there are 177.4 rainfall days, and 37.05" (941mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Olympia, in January, during 1.9 snowfall days, 1.38" (35mm) of snow is typically accumulated. Throughout the year, there are 8.7 snowfall days, and 5.31" (135mm) of snow is accumulated.

Daylight

In Olympia, Washington, the average length of the day is 9h.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Olympia. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in January in Olympia?

In Olympia, Washington, in January, 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?

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

What is the average humidity in January in Olympia?

The average relative humidity in January in Olympia is 89%.

How many days does it rain in January in Olympia?

In Olympia, in January, it is raining for 18.9 days, with typically 5.71" (145mm) of accumulated precipitation.

How many days does it snow in January in Olympia?

In Olympia, during January, snow falls for 1.9 days and regularly aggregates up to 1.38" (35mm) of snow.

What is the average length of the day in January in Olympia?

In January, the average length of the day in Olympia, Washington, is 9h.

How long on average sun shines in January in Olympia?

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

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

Months with the lowest UV index in Olympia 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 January, the average daily maximum UV index in Olympia, Washington, is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV rays.

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"

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

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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%

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").
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).
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

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in January: 3.5h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is December (Average sunshine: 3.4h).

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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

Months with the highest UV index are June and July (UV index 5).
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

Months with the most cloud cover are January and December (Cloud cover 65).
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

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

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