National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Fair

75°F

24°C

Humidity 99%
Wind Speed SE 5 mph
Barometer 29.91 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 12 Aug 12:55 am CDT
Extended Forecast for

5 Miles SSE Altamont IL

  • Overnight

    Overnight: Mostly clear, with a low around 74. South southwest wind around 7 mph, with gusts as high as 16 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Heat index values as high as 100. South southwest wind 6 to 8 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 50%.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 72. Southeast wind around 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms before 8am. Partly sunny, with a high near 90. Heat index values as high as 101. East southeast wind 5 to 7 mph becoming south southwest in the afternoon.

    High: 90 °F

    Chance
    T-storms then
    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southeast wind 3 to 5 mph. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 89. Light and variable wind becoming north northeast around 5 mph in the afternoon.

    High: 89 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 71. East wind 5 to 7 mph.

    Low: 71 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 74. South southwest wind around 7 mph, with gusts as high as 16 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Heat index values as high as 100. South southwest wind 6 to 8 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 72. Southeast wind around 6 mph.
Thursday
A 30 percent chance of showers and thunderstorms before 8am. Partly sunny, with a high near 90. Heat index values as high as 101. East southeast wind 5 to 7 mph becoming south southwest in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southeast wind 3 to 5 mph. Chance of precipitation is 40%.
Friday
Partly sunny, with a high near 89. Light and variable wind becoming north northeast around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 71. East wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Altamont IL
 38.99°N 88.7°W (Elev. 574 ft)
Last Update:
12:11 am CDT Aug 12, 2026
Forecast Valid:
1am CDT Aug 12, 2026-6pm CDT Aug 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation