Decatur (IL)
10 day weather forecast for Decatur
Sunday, September 20th, 2026, at 07:16 PM
today
31° 18°
tomorrow
21° 15°
Tuesday
17° 14°
Wednesday
21° 12°
Thursday
22° 12°
Friday
20° 15°
Saturday
23° 14°
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Decatur Weather Pages
Decatur weather forecast
The weather forecast for Decatur for today indicates hot conditions with temperatures around 31 °F.
Rain is expected from Sunday until Wednesday.
Wind speeds are expected to be strong, averaging around 26 km/h.
On Monday, expect a change in weather with temperatures reaching 21°C, and moderate rain with a 82% chance, accumulating about 3.59mm.
Decatur 14 days weather forecast
This weeks weather in Decatur. Click on a date for detailed forecasts
Sun. 20
31°
18°
1.2 mm
Mon. 21
21°
15°
3.6 mm
Tue. 22
17°
14°
0.1 mm
Wed. 23
21°
12°
0.1 mm
Thu. 24
22°
12°
0 mm
Fri. 25
20°
15°
1.2 mm
Sat. 26
23°
14°
0 mm
Sun. 27
25°
14°
0 mm
Mon. 28
17°
10°
5.4 mm
Tue. 29
16°
6°
0 mm
Wed. 30
23°
11°
0 mm
Thu. 1
19°
8°
0 mm
Fri. 2
20°
10°
0 mm
Sat. 3
21°
10°
0 mm
Further Ahead
You can click on date
Access Decatur weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Decatur long range weather forecast
30 day weather forecast for Decatur
Important Notice
Our Decatur long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.
Rain Forecast for the Next 14 Days in Decatur
The chart displays the expected rainfall values (in mm) over the next 14 days in Decatur, highlighting variations in precipitation levels for specific dates. ☔
Decatur Wind Speed Forecast Chart
This chart illustrates the projected daily max wind speed (in km) in Decatur over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀
Frequently asked questions about the weather in Decatur
How warm is it in Decatur over the next 14 days?
Over the next two weeks, temperatures in Decatur are expected to range from around 6 °F on the coldest nights up to about 31 °F on the warmest days. Use this range to plan what to pack and wear.
Will it rain in Decatur in the next two weeks?
Yes - rain is expected on about 6 of the next 14 days in Decatur, with roughly 11.6 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.
How windy is it in Decatur?
Maximum wind speeds in Decatur are forecast to reach about 31 km/h at their peak over the next 14 days.
When is the best time to visit Decatur?
For a month-by-month look at temperatures and rainfall, see our best time to visit Decatur guide.
How accurate is the 14-day forecast for Decatur?
Our Decatur forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.
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Where is Decatur?Get accurate weather forecasts for Decatur, located at latitude 39.84 and longitude -88.955. Stay updated with localized weather information tailored for Decatur.
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