Jefferson County, MO Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms then 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 slight chance of rain showers before 10am, then a slight chance of showers and thunderstorms between 10am and noon, then a chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. East wind 1 to 5 mph. Chance of precipitation is 50%.
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
- May 30 to Jun 5, 2026
- Latest sync
- May 30, 2026 9:56 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Friday looks like the warmest upcoming period in Jefferson County at 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday at about 2 to 6 mph NE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 9:56 AM CDT
- Coverage
- 7 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. Mostly cloudy, with a low around 62. East wind around 5 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind around 3 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Partly cloudy, with a low around 63. Southeast wind around 3 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. East wind around 3 mph. Chance of precipitation is 70%.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 62. Chance of precipitation is 20%.
Sunny, with a high near 82.
Mostly clear, with a low around 56.
Sunny, with a high near 81.
Mostly clear, with a low around 57.
Sunny, with a high near 84.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
May 30
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
82°F |
1 to 5 mph
E
|
|
Tonight
May 30
|
Chance Showers And Thunderstorms
|
62°F |
5 mph
E
|
|
Sunday
May 31
|
Chance Showers And Thunderstorms
|
81°F |
3 mph
SE
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
63°F |
3 mph
SE
|
|
Monday
Jun 1
|
Showers And Thunderstorms Likely
|
86°F |
3 mph
E
|
|
Monday Night
Jun 1
|
Slight Chance Showers And Thunderstorms
|
62°F |
3 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
82°F |
2 to 6 mph
NE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
56°F |
0 to 6 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
81°F |
1 to 5 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
57°F |
3 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
84°F |
3 mph
S
|
|
Thursday Night
Jun 4
|
Partly Cloudy then Slight Chance Rain Showers
|
64°F |
3 mph
S
|
|
Friday
Jun 5
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
87°F |
5 mph
S
|
|
Friday Night
Jun 5
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
68°F |
5 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.