Summersville, Illinois Weather
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Weather Forecast for Summersville, Illinois : Jefferson County
Issued: 4:31 am CDT Sep 16, 2025 Latitude: 38.3278269 Longitude: -88.8670074 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
Sunny on Today Mostly Clear on Tonight Sunny on Wednesday Sunny on Thursday 20% chance of on Friday 20% chance of thunderstorms on Saturday 20% chance of rain on Sunday 20% chance of thunderstorms on Monday
High: 94°F Low: 62°F High: 93°F High: 95°F High: 91°F High: 86°F High: 87°F High: 86°F
Low: 62°F Low: 63°F Low: 63°F Low: 64°F Low: 63°F  
Sunny Mostly Clear Sunny Sunny Partly Sunny Thunderstorms Rain Thunderstorms
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Current Conditions at
MT VERNON - (KMVN)
66°
Partly Cloudy
as of 4:56 AM CDST
Rel. Humidity: 93%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 7000ft
Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
64°
Partly Cloudy
as of 5:15 AM CDST
Rel. Humidity: 88%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 7000ft
Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
66°
Mostly Cloudy
as of 5:15 AM CDST
Rel. Humidity: 82%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 7000ft
Current Conditions at
FLORA MUNICIPAL AIRPORT - (KFOA)
66°
Partly Cloudy
as of 5:15 AM CDST
Rel. Humidity: 88%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
6 MPH
010° North
Cloud Level(s): Scattered at 7000ft
Sunny on Today Today... Sunny, with a high near 94. Calm wind becoming east northeast around 5 mph in the afternoon.
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 62. Light east northeast wind.
Sunny on Wednesday Wednesday... Sunny, with a high near 93. Light northeast wind.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 62. Light east southeast wind.
Sunny on Thursday Thursday... Sunny, with a high near 95. Calm wind becoming south southeast around 5 mph in the afternoon.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 63. Light east wind.
20% chance of Friday Friday... A 20 percent chance of showers after 1pm. Partly sunny, with a high near 91. Calm wind becoming south southwest around 6 mph in the afternoon.
20% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
20% chance of thunderstorms Saturday Saturday... A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.
10% chance of thunderstorms Saturday Night Saturday Night... A slight chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 64. Light south wind.
20% chance of rain Sunday Sunday... A chance of showers. Mostly sunny, with a high near 87. Calm wind becoming south 5 to 9 mph in the morning.
20% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South wind 3 to 6 mph.
20% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms. Partly sunny, with a high near 86. Light south wind becoming south southwest 5 to 9 mph in the morning.
Current Radar Image


Sun Almanac for Summersville, Illinois
Sunrise: 06:39 AM
Sunset: 7:02 PM
Civil Sunrise:06:12 AM
Civil Sunset: 7:28 PM
Nautical Sunrise: 05:41 AM
Nautical Sunset: 7:59 PM
Astro Sunrise: 05:09 AM
Astro Sunset: 8:31 PM
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