Saint Clair County, MO Weather Forecast
County weather hub
Scattered Showers And Thunderstorms then Showers And Thunderstorms
Compare major city weather across Saint Clair County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Scattered showers and thunderstorms between 11pm and midnight, then showers and thunderstorms. Mostly cloudy, with a low around 69. West wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
County Weather Overview
This county weather page brings together forecast coverage for Saint Clair County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Saint Clair County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 13 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 11:01 PM CDT
- Forecast office
- SGF
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Clair County
Thursday looks like the warmest upcoming period in Saint Clair County at 80 degrees F.
Friday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Friday at about 13 to 17 mph N.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 11:01 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- SGF
- Radar station
- KSGF
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 2pm, then scattered showers and thunderstorms. Mostly cloudy. High near 78, with temperatures falling to around 76 in the afternoon. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Isolated showers and thunderstorms between 7pm and 9pm, then a chance of showers and thunderstorms between 9pm and 1am, then scattered showers and thunderstorms between 1am and 2am, then showers and thunderstorms. Mostly cloudy. Low around 67, with temperatures rising to around 69 overnight. East wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 80. Southwest wind 3 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 49. Northwest wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 59.
Mostly clear, with a low around 39.
Sunny, with a high near 64.
Mostly clear, with a low around 43.
Sunny, with a high near 71.
Partly cloudy, with a low around 50.
Mostly sunny, with a high near 75.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Oct 13
|
Scattered Showers And Thunderstorms then Showers And Thunderstorms
|
69°F |
7 mph
W
|
|
Wednesday
Oct 14
|
Showers And Thunderstorms
|
78°F |
5 mph
E
|
|
Wednesday Night
Oct 14
|
Isolated Showers And Thunderstorms then Chance Showers And Thunderstorms
|
67°F |
3 mph
E
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
80°F |
3 to 9 mph
SW
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
49°F |
10 to 14 mph
NW
|
|
Friday
Oct 16
|
Mostly Sunny
|
59°F |
13 to 17 mph
N
|
|
Friday Night
Oct 16
|
Mostly Clear
|
39°F |
1 to 10 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
64°F |
2 mph
E
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
43°F |
3 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
71°F |
5 to 8 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
50°F |
5 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
75°F |
3 to 7 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
55°F |
3 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
80°F |
2 to 6 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Saint Clair County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Saint Clair County.
Largest mapped city population in this region: 1,080.
