Wilmington weather in September (Delaware, United States of America)

Interested in knowing the climate of Wilmington in September? Here’s a detailed forecast of the month’s weather patterns.

Temperatures

Typically, September in Wilmington includes high temperatures and high rainfall. You can expect daytime temperatures to reach around 26°C, while the nights will see a decline to about 16°C.

Precipitation

Wilmington in September usually receives high rainfall, averaging around 114 mm for the month. Records from the past 30 years suggest that around 9 days will experience rain.

Average sunshine

With approximately 218 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you prefer dry days with pleasant temperatures, May typically offers the best circumstances. While January, February and December tend to showcase less optimal conditions.

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

 

Wilmington, monthly averages in September

Min Temperature 16°C  

Max Temperature 26°C  

Chance of Rain 30%  

Precipitation 114 mm  

Rainy days 9 days  

Humidity 72% *  

Sunshine 218 hours *  

Percentage Sunshine 59% *  

* Data from: Philadelphia, the United States of America (39 KM, 24 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?

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. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Interested in more climate information?

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

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.