Jefferson County, MO Weather Forecast
County weather hub
Chance Showers And Thunderstorms
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms. Partly sunny, with a high near 78. Southeast wind around 6 mph. Chance of precipitation is 40%.
County Weather Overview
This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 8 of 8 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:43 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Tuesday looks like the warmest upcoming period in Jefferson County at 83 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 53 degrees F.
The strongest winds are forecast for Sunday at about 6 to 12 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:43 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 61. Chance of precipitation is 40%.
A slight chance of rain showers after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Chance Showers And Thunderstorms
|
78°F |
6 mph
SE
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms then Partly Cloudy
|
61°F |
6 mph
S
|
|
Sunday
Apr 12
|
Mostly Cloudy then Slight Chance Rain Showers
|
80°F |
6 to 12 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
65°F |
10 mph
S
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
82°F |
10 mph
SW
|
|
Monday Night
Apr 13
|
Mostly Cloudy then Slight Chance Showers And Thunderstorms
|
67°F |
9 mph
S
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
83°F |
10 mph
S
|
|
Tuesday Night
Apr 14
|
Chance Showers And Thunderstorms
|
60°F |
9 mph
S
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
77°F |
9 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
53°F |
7 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 8 of 8 mapped cities in Jefferson County.
Largest mapped city population in this region: 21,145.