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.

Overcast

48°F

9°C

Humidity 85%
Wind Speed NW 20 G 25 mph
Barometer 29.69 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 18 Apr 12:35 am CDT
Extended Forecast for

Savanna IL

  • Overnight

    Overnight: A 40 percent chance of showers, mainly before 1am. Cloudy, with a low around 38. Northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy through mid morning, then becoming sunny, with a high near 50. West wind around 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: 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: Widespread frost, mainly before 8am. Otherwise, mostly sunny, with a high near 52. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 52 °F

    Frost then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 58.

    High: 58 °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 74.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers, mainly before 1am. Cloudy, with a low around 38. Northwest wind around 15 mph, with gusts as high as 25 mph.
Saturday
Mostly cloudy through mid morning, then becoming sunny, with a high near 50. West wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
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
Widespread frost, mainly before 8am. Otherwise, mostly sunny, with a high near 52. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 28.
Monday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 72.
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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:
11:47 pm CDT Apr 17, 2026
Forecast Valid:
12am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Forecast Discussion
 
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Additional Resources

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