Castle Rock weather in September (Washington State, United States of America)

What kind of temperatures can you expect in Castle Rock during September? Want to know if this month is ideal for visiting? Our guide provides detailed weather information.

Temperatures

The weather in Castle Rock is usually perfect in September, characterized by high temperatures and moderate rainfall. The month of September belongs to the summer season. Anticipate daytime temperatures around 23°C, while night temperatures can drop to 9°C.

Precipitation

Castle Rock in September usually receives moderate rainfall, averaging around 53 mm for the month. Typically, you can expect about 10 days of rain this month.

Average sunshine

With approximately 236 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Castle Rock. June, July, August and September typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Castle Rock climate page with graphs.

 

Castle Rock, monthly averages in September

Min Temperature 9°C  

Max Temperature 23°C  

Chance of Rain 32%  

Precipitation 53 mm  

Rainy days 10 days  

Sunshine 236 hours *  

Percentage Sunshine *  

* Data from: Astoria, the United States of America (71 KM, 44 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?

For visitors traveling to Castle Rock, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

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 Castle Rock.

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.