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.

Partly Cloudy

66°F

19°C

Humidity 58%
Wind Speed S 9 mph
Barometer 29.95 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 13 May 12:15 am CDT
Extended Forecast for

Altamont IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy early, then gradual clearing, with a low around 57. Southwest wind around 8 mph becoming northwest. Winds could gust as high as 16 mph.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 70. Northwest wind 8 to 15 mph, with gusts as high as 21 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. North northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Partly cloudy, with a low around 52. Light south southeast wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 18 mph.

    Low: 52 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. South wind 14 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64. South wind around 8 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy early, then gradual clearing, with a low around 57. Southwest wind around 8 mph becoming northwest. Winds could gust as high as 16 mph.
Wednesday
Sunny, with a high near 70. Northwest wind 8 to 15 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 45. North northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 70. Light and variable wind.
Thursday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 52. Light south southeast wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 18 mph.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. South wind 14 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64. South wind around 8 mph, with gusts as high as 15 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87.
Monday Night
Showers likely. Mostly cloudy, with a low around 67.
Tuesday
Showers likely. Mostly cloudy, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.08°N 88.76°W (Elev. 633 ft)
Last Update:
11:41 pm CDT May 12, 2026
Forecast Valid:
12am CDT May 13, 2026-6pm CDT May 19, 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