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

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

56°F

13°C

Humidity 55%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 31 Mar 8:15 pm CDT
Extended Forecast for

Savanna IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 5pm. Cloudy, with a high near 48. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Cloudy then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 40. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 40 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 70. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 70 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 40. Breezy.

    Low: 40 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 43. Chance of precipitation is 90%.

    Low: 43 °F

    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly cloudy, with a high near 55.

    High: 55 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. North wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A 30 percent chance of showers after 5pm. Cloudy, with a high near 48. Northeast wind around 15 mph, with gusts as high as 25 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 40. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 70. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 40. Breezy.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 69.
Friday Night
Showers and possibly a thunderstorm. Low around 43. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 29.
Monday
Sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 57.
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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:
8:16 pm CDT Mar 31, 2026
Forecast Valid:
8pm CDT Mar 31, 2026-6pm CDT Apr 7, 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