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.

Thunderstorm in Vicinity

71°F

22°C

Humidity 78%
Wind Speed SW 8 mph
Barometer 29.87 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 13 Apr 12:15 pm CDT
Extended Forecast for

Savanna IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 76. South wind around 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then showers and thunderstorms likely after 1am. Low around 61. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    T-storms

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 10am. High near 74. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 74 °F

    Showers
    Likely then
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 74.

    High: 74 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers after 1pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 76. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 25 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Showers and thunderstorms likely before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then showers and thunderstorms likely after 1am. Low around 61. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 10am. High near 74. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 54.
Friday
A 50 percent chance of showers after 1pm. Mostly sunny, with a high near 82.
Friday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 50. Chance of precipitation is 80%.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 56.
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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:
11:52 am CDT Apr 13, 2026
Forecast Valid:
12pm CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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