Mount Rainier National Park Climate and Average Weather
Climate of Mount Rainier National Park: average temperatures, rainfall and seasons month by month.
Climate in Mount Rainier National Park month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 23° | 13° | 12,9 in | ★☆☆☆☆ |
| February | 19° | 9° | 11,4 in | ★☆☆☆☆ |
| March | 23° | 12° | 13,4 in | ★☆☆☆☆ |
| April | 27° | 15° | 5,1 in | ★☆☆☆☆ |
| May | 33° | 20° | 3,7 in | ★★☆☆☆ |
| June | 39° | 26° | 3,6 in | ★★☆☆☆ |
| July | 49° | 34° | 1,1 in | ★★★★☆ |
| August | 49° | 36° | 2,4 in | ★★★☆☆ |
| September | 45° | 31° | 3,8 in | ★★★☆☆ |
| October | 34° | 22° | 8,5 in | ★☆☆☆☆ |
| November | 25° | 15° | 14,9 in | ★☆☆☆☆ |
| December | 24° | 15° | 21,9 in | ★☆☆☆☆ |
Climate type: Polar. Source: Open-Meteo archive (ERA5).
Recent extremes in Mount Rainier National Park
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Mount Rainier National Park compares with nearby places
Annual averages, and the difference against Mount Rainier National Park.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Mount Rainier | 2 mi | 6°F | 53°F cooler | 103 in |
| Seattle-Tacoma International Airport | 48 mi | 52°F | +57°F warmer | 51 in |
| Seattle | 58 mi | 53°F | +58°F warmer | 43 in |
| Area Code 206 | 58 mi | 53°F | +58°F warmer | 43 in |
| King County | 58 mi | 53°F | +58°F warmer | 43 in |
Best time to visit Mount Rainier National Park
Go in July. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Mount Rainier National Park
Today is cooler than average for August. The forecast high of 42°F is 7.9°F below the 49°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
Overnight lows near 32°F mean ice is possible on bridges before dawn.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 61°F.
What to pack, what to skip
- A warm mid-layer and gloves for early mornings and evenings
- Insulated outer layer, hat and boots with grip for ice
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Mount Rainier National Park is a national park in Washington. Mount Rainier National Park is a US national park known for a glaciated volcano and wildflower meadows.
Right now it is 41°F (5°C) in Mount Rainier National Park with clear. It feels like 30°F. Today runs from 32°F to 42°F. Chance of precipitation is 5%. Sightseeing conditions score 7.5/10 - good conditions.
The best time to visit Mount Rainier National Park is July. The climate is polar. January, February and December tend to be the least comfortable months. August is the warmest month with average highs near 49°F, while February is the coldest with lows near 9°F.
The closest major airport is Seattle-Tacoma International Airport (SEA), about 48 mi away. Nearby highlights include Mount Rainier, Space Needle, Columbia River and Mount Hood.
In plain terms. Today is cooler than average for August. The forecast high of 42°F is 7.9°F below the 49°F typical for this month. The best window to be outside is roughly 5 PM to 8 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Mount Rainier National Park today at 9.8/10. Overnight lows near 32°F mean ice is possible on bridges before dawn.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Mount Rainier National Park
| Type | National park |
|---|---|
| State | Washington |
| Country | United States |
| Continent | North America |
| Coordinates | 46°52′48″N 121°43′36.8″W (46.88, -121.7269) |
| Established | 1899 |
| Known for | a glaciated volcano and wildflower meadows |
| Local time | 12:53 PM (UTC-07:00) |
| Best months | July |
| Climate | Polar |
Weather map for Mount Rainier National Park
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Mount Rainier National Park
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Mount Rainier National Park?
Mount Rainier National Park is a national park in Washington. Its coordinates are 46.88, -121.7269. It lies in North America.
What is the weather like in Mount Rainier National Park right now?
It is currently 41°F (5°C) with clear. Humidity is 35% and wind is 12 mph.
When is the best time to visit Mount Rainier National Park?
July offer the most comfortable conditions in Mount Rainier National Park, which has a polar climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Mount Rainier National Park in?
Mount Rainier National Park observes America/Los_Angeles (UTC-07:00). The local time is 12:53 PM.
What is the nearest airport to Mount Rainier National Park?
The closest airports are Seattle-Tacoma International Airport (SEA), 48 mi away, Portland International Airport (PDX), 98 mi away and Vancouver International Airport (YVR), 174 mi away.
What are the top things to do in Mount Rainier National Park?
Popular options include Mount Rainier, Space Needle, Columbia River, Mount Hood, Olympic National Park and Deception Pass State Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (national-parks) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 12:53 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
