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.

Partly Cloudy

37°F

3°C

Humidity 65%
Wind Speed W 17 G 24 mph
Barometer 29.90 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 18 Apr 8:15 am CDT
Extended Forecast for

Savanna IL

  • Today

    Today: Mostly sunny, with a high near 49. West wind around 15 mph, with gusts as high as 25 mph.

    High: 49 °F

    Mostly Sunny

  • Tonight

    Tonight: Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 31. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 31 °F

    Mostly Clear
    then Frost

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Widespread frost before 8am. Otherwise, mostly sunny, with a high near 51. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 51 °F

    Frost then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Widespread frost after 2am. Otherwise, mostly clear, with a low around 28. Northwest wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 9am. Otherwise, sunny, with a high near 57.

    High: 57 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly 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

Detailed Forecast

Today
Mostly sunny, with a high near 49. West wind around 15 mph, with gusts as high as 25 mph.
Tonight
Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 31. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of showers after 1pm. Widespread frost before 8am. Otherwise, mostly sunny, with a high near 51. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Widespread frost after 2am. Otherwise, mostly clear, with a low around 28. Northwest wind around 5 mph becoming calm in the evening.
Monday
Widespread frost before 9am. Otherwise, sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Showers likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Savanna IL
 42.09°N 90.13°W (Elev. 623 ft)
Last Update:
7:31 am CDT Apr 18, 2026
Forecast Valid:
8am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation