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

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

77°F

25°C

Humidity 52%
Wind Speed NW 6 mph
Barometer 30.03 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 27 Aug 7:15 pm CDT
Extended Forecast for

Thomson IL

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 58. Northwest wind around 5 mph becoming calm.

    Low: 58 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62. Calm wind becoming south around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 82. South wind 5 to 10 mph.

    High: 82 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 89.

    High: 89 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 58. Northwest wind around 5 mph becoming calm.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 62. Calm wind becoming south around 5 mph.
Saturday
Increasing clouds, with a high near 82. South wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 69.
Sunday
Partly sunny, with a high near 89.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Monday
Partly sunny, with a high near 88.
Monday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Tuesday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 71.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Thomson IL
 41.98°N 90.1°W (Elev. 600 ft)
Last Update:
2:51 pm CDT Aug 27, 2026
Forecast Valid:
7pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
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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