Weather in January
Temperature
During January, Mount Rainier National Park observes a subtle ascent to a still icy 34.9°F (1.6°C) from December's 33.8°F (1°C) in the average high-temperature. Throughout the month of January, Mount Rainier National Park observes an average nighttime temperature of 22.5°F (-5.3°C).Rainfall
In Mount Rainier National Park, during January, the rain falls for 21.1 days and regularly aggregates up to 18.23" (463mm) of precipitation. Throughout the year, there are 188.7 rainfall days, and 118.31" (3005mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall. In Mount Rainier National Park, during January, snow falls for 18.5 days and regularly aggregates up to 118.7" (3015mm) of snow. In Mount Rainier National Park, Washington, during the entire year, snow falls for 121.5 days and aggregates up to 670.91" (17041mm) of snow.Daylight
The average length of the day in January is 9h and 2min.On the first day of January, sunrise is at 7:52 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:07 pm PST.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
How many days does it rain in January?
How much does it snow in January?
What is the average length of the day in January in Mount Rainier National Park?
When are sunrise and sunset in January?
Average temperature in January
Mount Rainier National Park, WA
- Average high temperature in January: 34.9°F
The warmest month (with the highest average high temperature) is August (64.5°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in January: 22.5°F
The month with the highest average low temperature is August (43.9°F).
The coldest month (with the lowest average low temperature) is December (21.1°F).
Average rainfall in January
Mount Rainier National Park, WA
- Average rainfall in January: 18.2"
The wettest month (with the highest rainfall) is November (20.3").
The driest months (with the least rainfall) are July and August (2").
Average rainfall days in January
Mount Rainier National Park, WA
- Average rainfall days in January: 21.1 days
The month with the highest number of rainy days is November (21.7 days).
The month with the least rainy days is August (6.6 days).
Average snowfall in January
Mount Rainier National Park, WA
- Average snowfall in January: 99.9"
The months with the highest snowfall are January, November and December (99.9").
The month with the least snowfall is August (0.1").
Average snowfall days in January
Mount Rainier National Park, WA
- Average snowfall days in January: 18.5 days
The month with the highest number of snowfall days is March (19.5 days).
The month with the least snowfall days is August (0.1 days).
Average daylight in January
Mount Rainier National Park, WA
- Average daylight in January: 9h and 0min
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).
Mount Rainier National Park, Washington, USA
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