Byrnes Mill, Missouri Weather
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Weather Forecast for Byrnes Mill, Missouri : Jefferson County
Issued: 5:52 pm CDT Jul 3, 2025 Latitude: 38.4378319 Longitude: -90.581792 View on Google Maps

MouseOver for Detail Forecast
Tonight Independence Day Saturday Sunday Monday Tuesday Wednesday Thursday
Mostly Clear on Tonight Mostly Sunny on Independence Day Sunny on Saturday 40% chance of thunderstorms on Sunday 40% chance of thunderstorms on Monday 30% chance of thunderstorms on Tuesday 50% chance of thunderstorms on Wednesday 40% chance of thunderstorms on Thursday
Low: 70°F High: 93°F High: 95°F High: 91°F High: 90°F High: 91°F High: 89°F High: 88°F
Low: 71°F Low: 72°F Low: 72°F Low: 70°F Low: 70°F Low: 68°F  
Mostly Clear Mostly Sunny Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
SPIRIT OF ST LOUIS - (KSUS)
91°
Feels like 93°F
Clear
as of 4:54 PM CDST
Rel. Humidity: 41%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
5 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
91°
Feels like 93°F
Mostly Cloudy
as of 4:51 PM CDST
Rel. Humidity: 41%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
5 MPH
Cloud Level(s): Broken at 6000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
91°
Feels like 92°F
Clear
as of 4:53 PM CDST
Rel. Humidity: 38%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
7 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
ST CHARLES - (KSET)
90°
Feels like 91°F
Partly Cloudy
as of 4:54 PM CDST
Rel. Humidity: 43%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
7 MPH
030° Northeast
Cloud Level(s): Scattered at 6000ft
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 70. Calm wind.
Mostly Sunny on Independence Day Independence Day... Mostly sunny, with a high near 93. Calm wind becoming south around 6 mph in the afternoon.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.
Sunny on Saturday Saturday... Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 72. Light south wind.
40% chance of thunderstorms Sunday Sunday... A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91.
20% chance of thunderstorms Sunday Night Sunday Night... A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
40% chance of thunderstorms Monday Monday... A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 70.
30% chance of thunderstorms Tuesday Tuesday... A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
30% chance of thunderstorms Tuesday Night Tuesday Night... A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
50% chance of thunderstorms Wednesday Wednesday... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89.
40% chance of thunderstorms Wednesday Night Wednesday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
40% chance of thunderstorms Thursday Thursday... A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Current Radar Image


Sun Almanac for Byrnes Mill, Missouri
Sunrise: 05:43 AM
Sunset: 8:30 PM
Civil Sunrise:05:12 AM
Civil Sunset: 9:01 PM
Nautical Sunrise: 04:33 AM
Nautical Sunset: 9:41 PM
Astro Sunrise: 03:48 AM
Astro Sunset: 10:26 PM
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