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

How does the September weather in Sunnyside compare to other months? Want to know if it's a good time to visit? This page has all the weather details for the month.

Temperatures

The weather in Sunnyside is usually perfect in September, characterized by high temperatures and low rainfall. Anticipate daytime highs near 26°C, and cooler nights with temperatures around 8°C.

Precipitation

Sunnyside in September usually receives low rainfall, averaging around 8 mm for the month. Historically, the month has about 3 days of rain.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Sunnyside. April, May, June, July, August, September and October typically offer the most agreeable circumstances. On the other hand, January and December tend to be characterized by conditions that may not be as optimal.

Need inspiration to choose your next destination? Our innovative weather planner helps you discover the perfect getaway tailored to your ideal climate conditions.

Select a Month of Interest

Check the weather conditions for any month in the United States of America.

For a detailed overview of the weather over the year and the best time to visit the United States of America, check out our Sunnyside's climate page.

Sunnyside, monthly averages in September

Min TemperatureMin Temperature 8°C  
Max TemperatureMax Temperature 26°C  
Chance of RainChance of Rain 11%  
PrecipitationPrecipitation 8 mm  
Rainy daysRainy days 3 days  

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.

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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).

Select a Month of Interest

Check the weather conditions for any month in the United States of America.

For a detailed overview of the weather over the year and the best time to visit the United States of America, check out our Sunnyside's climate page.

So, what should you wear in this month?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.

What To Do

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

Cycling
8/10
Walking
8/10
Camping
5/10
Outdoor sports
8/10

Interested in more climate information?

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

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.