Greenville weather in September (Illinois, United States of America)

How is September weather typically in Greenville? Use this page to get an overview of the month’s weather conditions.

Temperatures

In September, the weather in Greenville generally includes high temperatures and high rainfall. Throughout the day, temperatures can rise to about 27°C. At night, they generally drop to 14°C.

Precipitation

Greenville in September usually receives high rainfall, averaging around 103 mm for the month. Based on our climate data of the past 30 years, about 9 days of rain are anticipated.

Average sunshine

Expect a lot of sunshine this month, with about 235 hours of sunny weather. The abundant sunlight creates a lively and bright atmosphere.

If your ideal day consists of dry skies and moderate temperatures October generally stands out with 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 Greenville climate page with graphs.

 

Greenville, monthly averages in September

Min Temperature 14°C  

Max Temperature 27°C  

Chance of Rain 30%  

Precipitation 103 mm  

Rainy days 9 days  

Humidity 71% *  

Sunshine 235 hours *  

Percentage Sunshine 63% *  

* Data from: St. Louis, the United States of America (74 KM, 46 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 Greenville.

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.