Washington County, ID Weather Forecast
County weather hub
Slight Chance Rain Showers then Sunny
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 rain showers before noon. Sunny, with a high near 96. 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
- Jul 24, 2026
- Latest sync
- Jul 18, 2026 8:13 AM MDT
- Forecast office
- BOI
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington County
Friday looks like the warmest upcoming period in Washington County at 96 degrees F.
Friday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Friday at about 2 to 12 mph S.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 18, 2026 8:13 AM MDT
- Coverage
- 2 days
- Time zone
- America/Boise
- Forecast office
- BOI
- Radar station
- KCBX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers before midnight. Mostly clear, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Slight Chance Rain Showers then Sunny
|
96°F |
2 to 12 mph
S
|
|
Friday Night
Jul 24
|
Slight Chance Rain Showers then Mostly Clear
|
66°F |
3 to 9 mph
WNW
|
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: 5,376.
