Washington County, ID 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 74.
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 10 to May 11, 2026
- Latest sync
- May 4, 2026 9:50 PM MDT
- Forecast office
- BOI
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington County
Monday looks like the warmest upcoming period in Washington County at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Sunday at about 7 mph WNW.
The forecast from May 10 through May 11 stays mostly dry.
Forecast Details
- Last updated
- May 4, 2026 9:50 PM 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
Mostly clear, with a low around 50.
Mostly sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 10
|
Sunny
|
74°F |
7 mph
WNW
|
|
Sunday Night
May 10
|
Mostly Clear
|
50°F |
6 mph
NNE
|
|
Monday
May 11
|
Mostly Sunny
|
80°F |
7 mph
NNE
|
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.
