DeKalb Weather in September

September in DeKalb brings high temperatures, with highs of 24°C (75°F) and nights dropping to 12°C (54°F). Rainfall is on the higher side this month, averaging around 76 mm (3 in), so keep a rain jacket handy.

Rainfall in DeKalb in September

The climate data from previous years indicates about 9 days of rain, averaging 76 mm (3 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in DeKalb in September

The temperature in DeKalb in September is excellent. Daytime highs reach 24°C (75°F), with nights dropping to 12°C (54°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in DeKalb in September

Expect sunny days throughout the month, with an estimated 226 hours of sunshine. This makes it a pleasant time to visit DeKalb.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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

DeKalb Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 30%  

Precipitation 76 mm (3 in)  

Rainy days 9 days  

Humidity 71% *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (70 KM, 43 Miles).

What to Wear in DeKalb in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in DeKalb in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

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

More climate data for DeKalb

Temperature Rainfall Sunshine Humidity

See the full DeKalb climate overview or explore weather in the United States of America.