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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Isolated severe thunderstorm gusts and a couple of tornadoes will be possible from southeast New Mexico into west Texas. Read More >

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

60°F

16°C

Humidity 91%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 28 Sep 9:55 pm CDT
Extended Forecast for

Thomson IL

  • Tonight

    Tonight: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Light southeast wind becoming south 5 to 10 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 72. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers. Low around 65. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 70. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 70 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 52. Calm wind.
Tuesday
Mostly sunny, with a high near 76. Light southeast wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 63. South wind around 5 mph.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 72. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers. Low around 65. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 70. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thomson IL
 41.96°N 90.1°W (Elev. 607 ft)
Last Update:
7:41 pm CDT Sep 28, 2026
Forecast Valid:
10pm CDT Sep 28, 2026-6pm CDT Oct 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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