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.

Fog/Mist

45°F

7°C

Humidity 95%
Wind Speed SE 3 mph
Barometer 29.73 in
Dewpoint 44°F (7°C)
Visibility 4.00 mi
Last update 10 Mar 3:15 am CDT
Extended Forecast for

Savanna IL

  • Overnight

    Overnight: Partly cloudy, with a low around 45. South wind around 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain and thunderstorms between 4pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 58. East wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 58 °F

    Mostly Sunny
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms before 4am, then a chance of rain. Low around 36. East wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 36 °F

    Rain then
    Chance
    T-storms

  • Wednesday

    Wednesday: Rain likely, mainly before 1pm. Mostly cloudy, with a high near 41. North wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 41 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Friday

    Friday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 45. South wind around 5 mph.
Tuesday
A chance of rain and thunderstorms between 4pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 58. East wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
Rain and thunderstorms before 4am, then a chance of rain. Low around 36. East wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 41. North wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Wednesday Night
Mostly clear, with a low around 24.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 48.
Friday Night
Mostly cloudy, with a low around 29.
Saturday
Cloudy, with a high near 51.
Saturday Night
Rain and snow likely. Cloudy, with a low around 32. Chance of precipitation is 60%.
Sunday
Rain and snow likely. Cloudy, with a high near 42. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Savanna IL
 42.09°N 90.13°W (Elev. 623 ft)
Last Update:
1:26 am CDT Mar 10, 2026
Forecast Valid:
3am CDT Mar 10, 2026-6pm CDT Mar 16, 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