Jefferson County, MO Weather Forecast
County weather hub
Clear
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Clear, with a low around 68. Southwest wind around 5 mph.
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
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 7:28 AM 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 95 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 14 mph N.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 7:28 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
Sunny, with a high near 95. Southwest wind around 6 mph.
A chance of showers and thunderstorms after 2am. Mostly clear, with a low around 71. Southwest wind 3 to 7 mph. Chance of precipitation is 50%.
Showers and thunderstorms. Mostly cloudy, with a high near 82. West wind around 3 mph. Chance of precipitation is 90%.
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. Northeast wind around 1 mph. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 80%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
A slight chance of rain showers before 7am. Partly sunny, with a high near 64. Chance of precipitation is 20%.
Partly cloudy, with a low around 38.
Sunny, with a high near 63.
Mostly clear, with a low around 36.
Sunny, with a high near 71.
Mostly clear, with a low around 45.
Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 13
|
Clear
|
68°F |
5 mph
SW
|
|
Tuesday
Oct 13
|
Sunny
|
95°F |
6 mph
SW
|
|
Tuesday Night
Oct 13
|
Mostly Clear then Chance Showers And Thunderstorms
|
71°F |
3 to 7 mph
SW
|
|
Wednesday
Oct 14
|
Showers And Thunderstorms
|
82°F |
3 mph
W
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms
|
65°F |
1 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
83°F |
5 mph
S
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms Likely
|
51°F |
5 to 12 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Partly Sunny
|
64°F |
14 mph
N
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
38°F |
3 to 12 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
63°F |
5 mph
NE
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
36°F |
2 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
71°F |
1 to 5 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
45°F |
5 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
76°F |
5 mph
S
|
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.