Decatur Weather in September

September in Decatur sees daytime temperatures around 26°C (79°F) and lows of 14°C (57°F) at night. With around 91 mm (3.6 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Decatur in September

Historically, approximately 9 days this month are expected to have rain, averaging 91 mm (3.6 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Decatur in September

September is a good time to be in Decatur. Days are perfect, reaching 26°C (79°F), with nights around 14°C (57°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Decatur in September

The month enjoys around 248 hours of sunshine, creating mostly sunny days with good weather conditions.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Decatur.

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• January
• February
• March
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• May
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• October
• November
• December

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

Decatur Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 30%  

Precipitation 91 mm (3.6 in)  

Rainy days 9 days  

Humidity 72% *  

Sunshine 248 hours *  

Percentage Sunshine 66% *  

* Data from: Springfield, the United States of America (59 KM, 36 Miles).

What to Wear in Decatur in September

Warm but pleasant conditions in Decatur in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Decatur in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

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 Decatur's climate page.

More climate data for Decatur

Temperature Rainfall Sunshine Humidity

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