Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Mostly Cloudy
81°F
27°C
| Humidity | 72% |
| Wind Speed | SW 6 mph |
| Barometer | 29.94 in (1013.4 mb) |
| Dewpoint | 71°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 19 Aug 12:54 pm CDT |
Extended Forecast for
2 Miles E Harristown IL
Flood Watch until August 20, 01:00am
NOW until 1:00am Thu
Flood Watch
This Afternoon
High: 81 °F
Showers
LikelyTonight
Low: 66 °F
Showers
Likely then
Chance
T-storms and
Patchy FogThursday
High: 81 °F
Patchy Fog
then SunnyThursday Night
Low: 61 °F
Mostly Clear
Friday
High: 83 °F
Sunny
Friday Night
Low: 64 °F
Chance
T-stormsSaturday
High: 82 °F
Mostly Sunny
Saturday Night
Low: 61 °F
Mostly Clear
Detailed Forecast
This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 81. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 1am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 66. North northeast wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 81. Northeast wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 61. Northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 83. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 64. West southwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 82. Northwest wind 5 to 11 mph, with gusts as high as 16 mph.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 84.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles E Harristown IL
39.84°N 89.03°W (Elev. 666 ft)
39.84°N 89.03°W (Elev. 666 ft)
1:26 pm CDT Aug 19, 2026
1pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
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