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

Will it be rainy or sunny in Olympic National Park this September? Check out this detailed guide to the month’s weather conditions.

Temperatures

Typically, September in Olympic National Park includes moderate temperatures and moderate rainfall. The month of September belongs to the summer season. Anticipate daytime highs near 16°C, and cooler nights with temperatures around 7°C.

Precipitation

Olympic National Park in September usually receives moderate rainfall, averaging around 52 mm for the month. Rain is expected on roughly 12 days.

Average sunshine

Enjoy a sunny month with about 204 hours of sunshine, providing a cheerful and lively atmosphere.

In case you lean more towards enjoying temperate temperatures and rain-free days July and August typically offer the most optimal weather. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions.

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

 

Olympic National Park, monthly averages in September

Min Temperature 7°C  

Max Temperature 16°C  

Chance of Rain 39%  

Precipitation 52 mm  

Rainy days 12 days  

Humidity 60% *  

Sunshine 204 hours *  

Percentage Sunshine 54% *  

* Data from: Victoria, Canada (52 KM, 32 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?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.

What To Do

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

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Olympic 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.