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

73°F

23°C

Humidity 99%
Wind Speed Calm
Barometer 29.92 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 27 Jun 8:35 pm CDT
Extended Forecast for

4 Miles WNW Watson IL

Heat Advisory June 28, 01:00pm until June 28, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 1am. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 70. Light south wind.

    Low: 70 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers and thunderstorms between 7am and 8am. Partly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South wind 3 to 6 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 92. Heat index values as high as 105. South wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind 3 to 7 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southwest wind 3 to 7 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. South wind around 5 mph becoming calm after midnight.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 1am. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 70. Light south wind.
Sunday
A slight chance of showers and thunderstorms between 7am and 8am. Partly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 73. South wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 92. Heat index values as high as 105. South wind 5 to 9 mph, with gusts as high as 15 mph.
Monday Night
Mostly clear, with a low around 73. South wind 3 to 7 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 3 to 7 mph.
Tuesday Night
Clear, with a low around 73. South wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 73.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 72.
Independence Day
A chance of showers and thunderstorms. Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Watson IL
 39.06°N 88.64°W (Elev. 551 ft)
Last Update:
7:51 pm CDT Jun 27, 2026
Forecast Valid:
8pm CDT Jun 27, 2026-6pm CDT Jul 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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