Mount Rainier National Park (Washington) in december: average Weather, Temperature and Climate
Best time to go to Mount Rainier National Park (Washington)?
Weather in Mount Rainier National Park (Washington) in december 2026
The weather in Mount Rainier National Park (Washington) in the month of december comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 2279.6cm
Weather at 6am
25°F
Snow showers
55% of time
17%
14%
9%
Weather at 12pm
36°F
Snow showers
48% of time
17%
13%
11%
Weather at 6pm
29°F
Snow showers
56% of time
18%
12%
9%
Weather at 3am
23°F
44%
24%
15%
12%
Evolution of daily average temperature and precipitation in Mount Rainier National Park (Washington) in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Mount Rainier National Park (Washington) in december.
The climate of Mount Rainier National Park (Washington) in december is very bad
In december in Mount Rainier National Park (Washington), the climate is wet (with 10.9in of rainfall over 11 days). It should be noted a worsening from the previous month since in november there is an average of 10in of rainfall over 12 days.
The climate is rather more than very fresh in that locality this month. Do not forget to cover yourself! The thermometer averaged maximum of 36°F. The seasonal minimum is 25°F. Thus, the mean temperature average in december in Mount Rainier National Park (Washington) is 31°F. These temperatures are far removed from those records observed in Mount Rainier National Park (Washington) in the month of december with a maximum record of 54°F in 2015 and a minimum record of -7°F in 2021. You can expect to have about 26 days with temperatures under 32°F, or 84% of time.
On average, in Mount Rainier National Park (Washington), the days of december last 08:33. Sunrise is at 07:46 and sunset is at 16:19.
December: another location in the United States (USA)?
If you want to go to the United States (USA) in december, there are destinations with better weather than Mount Rainier National Park (Washington):
In december, Miami (Florida) has perfect weather.
Furthermore, Hawaii (Honolulu), Houston, Myrtle Beach, Phoenix (Arizona), Carolina Beach and Dauphin Island (Alabama) have good weather.
Finally, California, Louisiana, Atlanta, Dallas, Austin and Big Bend National Park (Texas) have a tolerable climate, but better than Mount Rainier National Park (Washington).
Seasonal average climate and temperature of Mount Rainier National Park (Washington) in december
Check below seasonal norms These datas are generated from the weather statements of the last years of the month of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 31°F | ||||
| Highest temperature | 36°F | ||||
| Lowest temperature | 25°F | ||||
| Highest record temperature | 54°F (2015) | ||||
| Lowest record temperature | -7°F (2021) | ||||
| Number of days at -32°F | 26 day(s) (84%) | ||||
| Wind | |||||
| Wind speed | 11km/h | ||||
| Wind temperature | 20°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 10.9in | ||||
| Number of days with rainfall | 11 day(s) (35%) | ||||
| Record daily rainfall | 4.6in (2013) | ||||
| Snowfall | 2279.6cm | ||||
| Other climate data | |||||
| Humidity | 95% | ||||
| Visibility | 5.42km | ||||
| Cloud cover | 65% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 6 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:46 | ||||
| Time of sunset | 16:19 | ||||
| Length of day | 08:33 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Mount Rainier National Park (Washington) in december 2025:
32°F to 38°F
27°F to 29°F
16°F to 32°F
27°F to 32°F
31°F to 43°F
29°F to 32°F
27°F to 38°F
36°F to 41°F
27°F to 41°F
38°F to 45°F
32°F to 45°F
38°F to 45°F
41°F to 52°F
34°F to 50°F
40°F to 47°F
32°F to 40°F
23°F to 40°F
27°F to 38°F
23°F to 36°F
22°F to 31°F
27°F to 31°F
23°F to 34°F
29°F to 34°F
31°F to 32°F
27°F to 31°F
11°F to 25°F
14°F to 18°F
11°F to 29°F
34°F to 38°F
34°F to 41°F
40°F to 43°F
Map: other cities in the United States (USA) in december
Cities near Mount Rainier National Park (Washington):
| Seattle in december | very bad weather |
| Portland in december | very bad weather |
| Westport (Washington) in december | very bad weather |
| Ocean Park (Washington) in december | bad weather |
| Long Beach (Washington) in december | bad weather |
| Salem (Oregon) in december | very bad weather |
| La Push (Washington) in december | very bad weather |
| Lincoln City (Oregon) in december | bad weather |
| Newport (Oregon) in december | bad weather |
| Coos Bay in december | bad weather |
| Crater Lake (Oregon) in december | very bad weather |
| Boise (Idaho) in december | very bad weather |
Click over cities on the map for information about the weather in december.
Mount Rainier National Park (Washington)
perfect weather
good
tolerable
bad
very bad
Weather data for Mount Rainier National Park (Washington) in december:
Weather data for Mount Rainier National Park (Washington) for december are derived from an average of the weather forecast since 2009 in Mount Rainier National Park (Washington). There is a margin of error and these forecasts are to be considered as general information only. The weather in Mount Rainier National Park (Washington) can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Mount Rainier National Park (Washington).