Decatur Weather in September

During September, Decatur experiences high daytime temperatures of 29°C (84°F) and cooler nights around 18°C (64°F). Expect quite a bit of rainfall. Around 99 mm (3.9 in) is typical.

Rainfall in Decatur in September

Looking at the last 30 years, the data shows about 8 days with rain, averaging 99 mm (3.9 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Decatur in September

September in Decatur is generally excellent, with days reaching 29°C (84°F) and nights settling around 18°C (64°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 18°C (64°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

Enjoy a sunny month with about 227 hours of sunshine, the clear skies make Decatur even more beautiful.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, September and October typically offer the best weather for Decatur.

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.

Decatur Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 29°C (84°F)  

Chance of Rain 25%  

Precipitation 99 mm (3.9 in)  

Rainy days 8 days  

Humidity 74% *  

Sunshine 227 hours *  

Percentage Sunshine 61% *  

* Data from: Atlanta, the United States of America (8 KM, 5 Miles).

What to Wear in Decatur in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. 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.