Boulder, Illinois Weather
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Weather Forecast for Boulder, Illinois : Clinton County
Issued: 5:26 am CDT Sep 16, 2025 Latitude: 38.6967148 Longitude: -89.225627 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 30% chance of thunderstorms on Saturday 30% chance of on Sunday 30% chance of thunderstorms on Monday
High: 90°F Low: 68°F High: 89°F High: 92°F High: 87°F High: 82°F High: 84°F High: 84°F
Low: 68°F Low: 70°F Low: 70°F Low: 70°F Low: 70°F  
Sunny Mostly Clear Sunny Sunny Partly Sunny Thunderstorms Partly Sunny Thunderstorms
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Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
68°
Clear
as of 6:55 AM CDST
Rel. Humidity: 82%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
3 MPH
060° Northeast
Cloud Level(s): Clear
Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
63°
Partly Cloudy
as of 6:55 AM CDST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 7000ft
Current Conditions at
MT VERNON - (KMVN)
66°
Partly Cloudy
as of 6:56 AM CDST
Rel. Humidity: 93%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
6 MPH
030° Northeast
Cloud Level(s): Scattered at 7000ft
Current Conditions at
LITCHFIELD MUNI ARP - (K3LF)
59°
Clear
as of 6:55 AM CDST
Rel. Humidity: 87%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 90. North wind 3 to 6 mph.
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 68. East wind around 6 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 89. East wind around 5 mph becoming calm in the morning.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 68. Southeast wind around 6 mph.
Sunny on Thursday Thursday... Sunny, with a high near 92. South wind 3 to 5 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 70.
20% chance of Friday Friday... A 20 percent chance of showers. Partly sunny, with a high near 87.
40% chance of thunderstorms Friday Night Friday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
30% chance of thunderstorms Saturday Saturday... A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
20% chance of thunderstorms Saturday Night Saturday Night... A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
30% chance of Sunday Sunday... A 30 percent chance of showers. Partly sunny, with a high near 84.
30% chance of thunderstorms Sunday Night Sunday Night... A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
30% chance of thunderstorms Monday Monday... A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Current Radar Image


Sun Almanac for Boulder, Illinois
Sunrise: 06:40 AM
Sunset: 7:03 PM
Civil Sunrise:06:13 AM
Civil Sunset: 7:30 PM
Nautical Sunrise: 05:42 AM
Nautical Sunset: 8:01 PM
Astro Sunrise: 05:10 AM
Astro Sunset: 8:33 PM
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