Weather in Decatur, United States 🇺🇸
Right now Decatur is 18°C with clear, feeling like 17°C. Expect 78% humidity and winds of about 10 km/h, and the UV index is 0 (low). The next few days in Decatur look set for about 16°C up to 31°C. ⚠️ Flood Warning issued August 20 at 9:55AM CDT until August 23 at 3:00AM CDT by NWS Lincoln IL
Hourly Forecast for Decatur
14-Day Forecast for Decatur
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Additional Forecasts for Decatur
Air Quality
Historical Weather
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Best Time to Be Outside in Decatur Today
The most comfortable window in Decatur today looks like 09:00 to 12:00, when it is around 25°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in Decatur
What is the temperature in Decatur right now?
The current temperature in Decatur is 18°C (64°F), clear (feels like 17°C).
What's the weather like in Decatur right now?
Current weather in Decatur: Clear, humidity 78%, wind 10 km/h ENE.
What is today's forecast for Decatur?
Today in Decatur: high 31°C, low 16°C, sunny. Chance of rain: 6%.
What is the 7-day weather forecast for Decatur?
Daily highs and lows for Decatur:
- 2026-08-21: 31°C / 16°C
- 2026-08-22: 27°C / 18°C
- 2026-08-23: 24°C / 16°C
- 2026-08-24: 24°C / 14°C
- 2026-08-25: 26°C / 17°C
- 2026-08-26: 30°C / 20°C
- 2026-08-27: 28°C / 19°C
Is it going to rain in Decatur today?
There is a 6% chance of rain in Decatur today.
What is the wind speed in Decatur right now?
Wind in Decatur is currently 10 km/h (6 mph) from the ENE.
What is the UV index in Decatur right now?
The UV index in Decatur is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
