Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
78°F
26°C
| Humidity | 93% |
| Wind Speed | W 5 mph |
| Barometer | 30.01 in (1015.5 mb) |
| Dewpoint | 76°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 81°F (27°C) |
| Last update | 16 Aug 4:54 am CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Overnight
Low: 74 °F
Chance
T-stormsSunday
High: 85 °F
Showers
Likely then
Chance
T-stormsSunday Night
Low: 68 °F
Slight Chance
T-storms then
Mostly CloudyMonday
High: 82 °F
Mostly Sunny
Monday Night
Low: 63 °F
Mostly Clear
Tuesday
High: 84 °F
Mostly Sunny
Tuesday Night
Low: 68 °F
Partly Cloudy
then Showers
LikelyWednesday
High: 81 °F
Chance
ShowersWednesday Night
Low: 62 °F
Partly Cloudy
Detailed Forecast
Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74. West wind around 5 mph.
Sunday
Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 85. West wind 7 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 68. Northwest wind 5 to 8 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 82. North northwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 84. Calm wind becoming southwest around 6 mph in the morning.
Tuesday Night
Showers likely after 1am. Partly cloudy, with a low around 68. South wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 50 percent chance of showers before 1pm. Partly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 81.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles ENE Harristown IL
39.84°N 89.03°W (Elev. 666 ft)
39.84°N 89.03°W (Elev. 666 ft)
4:36 am CDT Aug 16, 2026
5am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
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