Mark Twain, Missouri Weather
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Weather Forecast for Mark Twain, Missouri : St. Louis (city) County
Issued: 5:52 pm CDT Jul 16, 2025 Latitude: 38.6892 Longitude: -90.2408 View on Google Maps

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Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
40% chance of thunderstorms on Tonight 40% chance of thunderstorms on Thursday 50% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 30% chance of thunderstorms on Sunday 20% chance of thunderstorms on Monday Sunny on Tuesday Sunny on Wednesday
Low: 77°F High: 89°F High: 88°F High: 95°F High: 94°F High: 96°F High: 98°F High: 100°F
Low: 73°F Low: 75°F Low: 78°F Low: 77°F Low: 79°F Low: 79°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Sunny Sunny
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Current Conditions at
ST LOUIS - (KSTL)
81°
Clear
Light Thunderstorm Rain
as of 6:01 PM CDST
Rel. Humidity: 74%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: VFR
Wind Data
7 MPH
330° Northwest
Cloud Level(s): Few at 4600ft, Scattered Cumulonimbus at 6500ft, Broken at 11000ft, Broken at 25000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
82°
Mostly Cloudy
Light Rain
as of 5:53 PM CDST
Rel. Humidity: 65%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
5 MPH
Cloud Level(s): Few at 4000ft, Scattered at 6500ft, Broken at 8000ft
Current Conditions at
ALTON - (KALN)
73°
Cloudy
as of 5:50 PM CDST
Rel. Humidity: 88%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 5000ft, Solid Overcast at 10000ft
Current Conditions at
ST CHARLES - (KSET)
73°
Mostly Cloudy
Thunderstorm Rain Mist
as of 5:54 PM CDST
Rel. Humidity: 94%
Dew Point: 72°F
Visibility: 3 Miles
Pressure: 29.91 in.
Flight Rule: MVFR
Wind Data
8 MPH
270° West
Cloud Level(s): Few at 5000ft, Broken at 7500ft, Broken at 11000ft
40% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 77. West wind 3 to 8 mph. Chance of precipitation is 40%.
40% chance of thunderstorms Thursday Thursday... A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. Light and variable wind becoming north around 6 mph in the morning.
40% chance of thunderstorms Thursday Night Thursday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Northeast wind 3 to 6 mph.
50% chance of thunderstorms Friday Friday... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88. Light and variable wind becoming east around 5 mph in the morning.
20% chance of thunderstorms Friday Night Friday Night... A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Southeast wind 3 to 5 mph.
30% chance of thunderstorms Saturday Saturday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
30% chance of thunderstorms Saturday Night Saturday Night... A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 78.
30% chance of thunderstorms Sunday Sunday... A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94.
30% chance of thunderstorms Sunday Night Sunday Night... A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 77.
20% chance of thunderstorms Monday Monday... A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 79.
Sunny on Tuesday Tuesday... Sunny and hot, with a high near 98.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 79.
Sunny on Wednesday Wednesday... Sunny and hot, with a high near 100.
Current Radar Image


Sun Almanac for Mark Twain, Missouri
Sunrise: 05:50 AM
Sunset: 8:24 PM
Civil Sunrise:05:19 AM
Civil Sunset: 8:55 PM
Nautical Sunrise: 04:41 AM
Nautical Sunset: 9:34 PM
Astro Sunrise: 03:58 AM
Astro Sunset: 10:17 PM
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