Washington County, MO Weather Forecast
County weather hub
Sunny
Compare major city weather across Washington County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 63.
County Weather Overview
This county weather page brings together forecast coverage for Washington 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 Washington County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 17 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 4:51 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington County
Monday looks like the warmest upcoming period in Washington County at 76 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Saturday at about 5 mph NE.
The forecast from Oct 17 through Oct 19 stays mostly dry.
Forecast Details
- Last updated
- Oct 13, 2026 4:51 AM CDT
- Coverage
- 3 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
Mostly clear, with a low around 38.
Sunny, with a high near 71.
Mostly clear, with a low around 46.
Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Oct 17
|
Sunny
|
63°F |
5 mph
NE
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
38°F |
2 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
71°F |
1 to 5 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
46°F |
3 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
76°F |
5 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Washington County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Washington County.
Largest mapped city population in this region: 2,548.
