Mount Rainier National Park (Washington) in september: average Weather, Temperature and Climate
Best time to go to Mount Rainier National Park (Washington)?
Weather in Mount Rainier National Park (Washington) in september 2025
The weather in Mount Rainier National Park (Washington) in the month of september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather 121.7cm
Weather at 6am
45°F
Clear/Sunny
46% of time
18%
18%
8%
Weather at 12pm
68°F
Clear/Sunny
56% of time
18%
17%
5%
Weather at 6pm
54°F
Clear/Sunny
50% of time
17%
16%
6%
Weather at 3am
40°F
40%
22%
17%
13%
Evolution of daily average temperature and precipitation in Mount Rainier National Park (Washington) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Mount Rainier National Park (Washington) in september.
The climate of Mount Rainier National Park (Washington) in september is tolerable
the weather in Mount Rainier National Park (Washington) in september is rather dry (with 3in of rainfall over 4 days). It should be noted a worsening from the previous month since in august there is an average of 1.5in of precipitation over 2 days.
The climate quite comfortable around this city the month of september. The thermometer averaged maximum of 70°F. The minimum is 45°F. Thus, the mean temperature average on this month of september in Mount Rainier National Park (Washington) is 58°F. These temperatures are far removed from those records observed in Mount Rainier National Park (Washington) in the month of september with a maximum record of 101°F in 2017 and a minimum record of 23°F in 2019. You can hope to have about 21 days with temperatures over 65°F, or 70% of time.
In september in Mount Rainier National Park (Washington), the days on average last 12:32. Sunrise is at 05:46 and sets at 18:18.
With proper weather, september is okay (but not the best) to go in that area in United States.
Mount Rainier National Park (Washington): another month?
If you can push the dates of your trip to Mount Rainier National Park (Washington) forward, the month of october has a better weather forecast than september. more information
September: another location in the United States (USA)?
If you want to go to the United States (USA) in september, there are destinations with better weather than Mount Rainier National Park (Washington):
In september, Grand Canyon, Hawaii (Honolulu), Las Vegas, Seattle, Denver and Minneapolis (Minnesota) have perfect weather.
Furthermore, California, Louisiana, Washington D. C., Atlanta, Boston and Chicago have good weather.
Seasonal average climate and temperature of Mount Rainier National Park (Washington) in september
Check below seasonal norms These statistics are compiled from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 58°F | ||||
| Highest temperature | 70°F | ||||
| Lowest temperature | 45°F | ||||
| Highest record temperature | 101°F (2017) | ||||
| Lowest record temperature | 23°F (2019) | ||||
| Number of days at +86°F | 2 day(s) (7%) | ||||
| Number of days at +65°F | 21 day(s) (70%) | ||||
| Number of days at -32°F | 1 day(s) (3%) | ||||
| Wind | |||||
| Wind speed | 10km/h | ||||
| Wind temperature | 41°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3in | ||||
| Number of days with rainfall | 4 day(s) (14%) | ||||
| Record daily rainfall | 3.3in (2013) | ||||
| Snowfall | 121.7cm | ||||
| Other climate data | |||||
| Humidity | 77% | ||||
| Visibility | 8.69km | ||||
| Cloud cover | 31% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:46 | ||||
| Time of sunset | 18:18 | ||||
| Length of day | 12:32 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Mount Rainier National Park (Washington) in september 2024:
61°F to 86°F
56°F to 74°F
58°F to 72°F
50°F to 81°F
61°F to 90°F
63°F to 90°F
63°F to 86°F
59°F to 83°F
52°F to 68°F
49°F to 68°F
50°F to 54°F
54°F to 61°F
47°F to 67°F
56°F to 65°F
49°F to 63°F
47°F to 68°F
50°F to 56°F
54°F to 56°F
49°F to 59°F
49°F to 58°F
47°F to 65°F
54°F to 63°F
58°F to 70°F
61°F to 81°F
59°F to 68°F
50°F to 61°F
54°F to 61°F
50°F to 59°F
47°F to 58°F
47°F to 59°F
Map: other cities in the United States (USA) in september
Cities near Mount Rainier National Park (Washington):
| Seattle in september | perfect weather |
| Portland in september | good weather |
| Westport (Washington) in september | good weather |
| Ocean Park (Washington) in september | good weather |
| Long Beach (Washington) in september | good weather |
| Salem (Oregon) in september | perfect weather |
| La Push (Washington) in september | good weather |
| Lincoln City (Oregon) in september | good weather |
| Newport (Oregon) in september | good weather |
| Coos Bay in september | good weather |
| Crater Lake (Oregon) in september | tolerable weather |
| Boise (Idaho) in september | perfect weather |
Click over cities on the map for information about the weather in september.
Mount Rainier National Park (Washington)
perfect weather
good
tolerable
bad
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Weather data for Mount Rainier National Park (Washington) in september:
Weather data for Mount Rainier National Park (Washington) for september 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).