Olympia
Washington, USA
Long-term weather forecast
Long-term weather forecast

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
January, the same as December, in Olympia, Washington, is a frosty winter month, with temperature in the range of an average high of 45.9°F (7.7°C) and an average low of 33.6°F (0.9°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still frosty 45.9°F (7.7°C). The average low-temperature, in January, is 33.6°F (0.9°C).

Humidity

In Olympia, the average relative humidity in January is 87.5%.

Rainfall

In Olympia, in January, during 20 rainfall days, 7.8" (199.1mm) of precipitation is typically accumulated. In Olympia, during the entire year, the rain falls for 162.8 days and collects up to 50" (1270mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Olympia, Washington. In Olympia, during January, snow falls for 1.1 days and regularly aggregates up to 1.9" (48.3mm) of snow. Throughout the year, in Olympia, Washington, there are 6.3 snowfall days, and 10.8" (274.4mm) of snow is accumulated.

Daylight

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

Sunshine

Months with the least sunshine are January and December, with an average of 2h of sunshine.

UV index

Months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in January in Olympia?

In January, in Olympia, the average high-temperature is 45.9°F (7.7°C), and the average low-temperature is 33.6°F (0.9°C).

What is the average humidity in January in Olympia?

The average relative humidity in January in Olympia is 87.5%.

How much does it rain in Olympia in January?

In Olympia, in January, during 20 rainfall days, 7.8" (199.1mm) of precipitation is typically accumulated.

How much does it snow in Olympia in January?

In Olympia, Washington, in January, during 1.1 snowfall days, 1.9" (48.3mm) of snow is typically accumulated.

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

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

What is the month with the least sunshine in Olympia?

Months with the least sunshine in Olympia are January and December, with an average of 2h of sunshine.

How long on average sun shines in January in Olympia?

In Olympia, the average sunshine in January is 2h.

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

Months with the lowest UV index in Olympia are January, November and December, with an average maximum UV index of 1.

How high is the UV index in January in Olympia?

The average daily maximum UV index in January in Olympia, Washington, is 1. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.
Average temperature in January - Olympia, WA
  • Average high temperature in January: 45.9°F

The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (44.2°F).

  • Average low temperature in January: 33.7°F

The month with the highest average low temperature is July (50.8°F).
The coldest month (with the lowest average low temperature) is December (32.6°F).

Average humidity in January - Olympia, WA
  • Average humidity in January: 87.5%

The month with the highest relative humidity is December (89.1%).
The month with the lowest relative humidity is July (70.8%).

Average rainfall in January - Olympia, WA
  • Average rainfall in January: 7.8"

The wettest month (with the highest rainfall) is November (8.6").
The driest month (with the lowest rainfall) is July (0.6").

Average rainfall days in January - Olympia, WA
  • Average rainfall days in January: 20 days

The month with the highest number of rainy days is November (20.1 days).
The month with the lowest number of rainy days is July (4.6 days).

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

The month with the highest snowfall is February (4.7").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January - Olympia, WA
  • Average snowfall days in January: 1.1 days

The month with the highest number of snowfall days is February (2.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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 shortest days is December (Average daylight: 8.6h).

  • Average sunshine in January: 2h

The month with most sunshine is July (Average sunshine: 10h).
Months with least sunshine are January and December (Average sunshine: 2).

Average UV index in January - Olympia, WA
  • Average UV index in January: 1

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).