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

38°F

3°C

Humidity 52%
Wind Speed W 5 mph
Barometer 30.11 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 19 Apr 5:15 am CDT
Extended Forecast for

Savanna IL

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Today

    Today: A slight chance of showers between 10am and noon. Widespread frost before 8am. Otherwise, increasing clouds, with a high near 50. Southwest wind 5 to 15 mph becoming northwest in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 50 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tonight

    Tonight: Widespread frost after 3am. Otherwise, mostly clear, with a low around 27. Northwest wind 5 to 10 mph becoming light north after midnight.

    Low: 27 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.

    High: 56 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South wind around 5 mph.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers between 10am and noon. Widespread frost before 8am. Otherwise, increasing clouds, with a high near 50. Southwest wind 5 to 15 mph becoming northwest in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Tonight
Widespread frost after 3am. Otherwise, mostly clear, with a low around 27. Northwest wind 5 to 10 mph becoming light north after midnight.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 44. South wind around 5 mph.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Showers. Low around 56. Chance of precipitation is 80%.
Friday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 63.
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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:
3:12 am CDT Apr 19, 2026
Forecast Valid:
5am CDT Apr 19, 2026-6pm CDT Apr 25, 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