Herculaneum, Missouri Weather
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Weather Forecast for Herculaneum, Missouri : Jefferson County
Issued: 5:52 pm CDT May 10, 2025 Latitude: 38.2683879 Longitude: -90.3801201 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Cloudy on Tonight Sunny on Sunday 80% chance of thunderstorms on Monday 40% chance of thunderstorms on Tuesday Sunny on Wednesday 20% chance of thunderstorms on Thursday 20% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday
Low: 50°F High: 77°F High: 73°F High: 79°F High: 85°F High: 91°F High: 87°F High: 82°F
Low: 58°F Low: 59°F Low: 60°F Low: 67°F Low: 66°F Low: 60°F  
Cloudy Sunny Thunderstorms Thunderstorms Sunny Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
EAST ST LOUIS - (KCPS)
73°
Clear
as of 6:53 PM CDST
Rel. Humidity: 35%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
7 MPH
070° East
Cloud Level(s): Clear
Current Conditions at
SPIRIT OF ST LOUIS - (KSUS)
70°
Clear
as of 6:54 PM CDST
Rel. Humidity: 60%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
73°
Mostly Cloudy
as of 6:51 PM CDST
Rel. Humidity: 35%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
5 MPH
100° East
Cloud Level(s): Broken at 25000ft
Current Conditions at
SCOTT AFB - (KBLV)
70°
Clear
as of 6:55 PM CDST
Rel. Humidity: 52%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
6 MPH
120° Southeast
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 50. Calm wind becoming northeast around 6 mph after midnight.
Sunny on Sunday Sunday... Sunny, with a high near 77. Northeast wind 5 to 10 mph.
30% chance of thunderstorms Sunday Night Sunday Night... A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 58. Northeast wind 3 to 7 mph. Chance of precipitation is 30%.
80% chance of thunderstorms Monday Monday... Showers and possibly a thunderstorm. High near 73. Calm wind becoming east around 5 mph. Chance of precipitation is 80%.
20% chance of thunderstorms Monday Night Monday Night... A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 59. Calm wind. Chance of precipitation is 20%.
40% chance of thunderstorms Tuesday Tuesday... A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 60.
Sunny on Wednesday Wednesday... Sunny, with a high near 85.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 67.
20% chance of thunderstorms Thursday Thursday... A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
20% chance of thunderstorms Thursday Night Thursday Night... A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
20% chance of thunderstorms Friday Friday... A 20 percent chance of showers and thunderstorms. Mostly 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 60.
30% chance of thunderstorms Saturday Saturday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Current Radar Image


Sun Almanac for Herculaneum, Missouri
Sunrise: 05:55 AM
Sunset: 8:01 PM
Civil Sunrise:05:25 AM
Civil Sunset: 8:31 PM
Nautical Sunrise: 04:49 AM
Nautical Sunset: 9:06 PM
Astro Sunrise: 04:11 AM
Astro Sunset: 9:45 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.