Washington County, MO Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Washington County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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
- May 17, 2026
- Latest sync
- May 11, 2026 4:28 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington County
Sunday looks like the warmest upcoming period in Washington County at 88 degrees F.
Sunday is the coolest period ahead with temperatures near 88 degrees F.
The strongest winds are forecast for Sunday at about 3 to 8 mph SW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- May 11, 2026 4:28 AM CDT
- Coverage
- 1 day
- 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
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 17
|
Slight Chance Showers And Thunderstorms
|
88°F |
3 to 8 mph
SW
|
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.
