Mount Rainier National Park weather in September (Washington State, United States of America)

How does the September weather in Mount Rainier National Park compare to other months? Check out this detailed guide to the month’s weather conditions.

Temperatures

In September, Mount Rainier National Park tends to experience low temperatures and high snow/rainfall. The summer season is characteristic of September. During the day, temperatures can climb to about 8°C. At night, they may fall to a cooler -3°C.

Precipitation

Mount Rainier National Park in September usually receives high snow/rainfall, averaging around 122 mm for the month. Typically around 12 days days of snow/rainfall are expected.

Average sunshine

There are approximately 209 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Mount Rainier National Park . July and August typically offer the most optimal weather. In contrast, January, February, March, April, May, June, September, October, November and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Mount Rainier National Park climate page with graphs.

 

Mount Rainier National Park , monthly averages in September

Min Temperature -3°C  

Max Temperature 8°C  

Chance of Rain 40%  

Precipitation 122 mm  

Rainy days 12 days  

Sunshine 209 hours *  

Percentage Sunshine 55% *  

Data from: Tacoma, the United States of America (68 KM, 42 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

Wear a base layer in cold weather; this is the #1 thing you can do to increase your overall body temperature.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

1/10

Outdoor sports

4/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Mount Rainier National Park .

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.