Washington County, ID Weather Forecast
County weather hub
Rain Showers
Compare major city weather across Washington County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers. Cloudy, with a high near 48. West wind 10 to 16 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
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
- Apr 22 to Apr 26, 2026
- Latest sync
- Apr 20, 2026 9:37 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 56 degrees F.
Thursday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 16 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 20, 2026 9:37 AM MDT
- Coverage
- 6 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
Rain showers. Mostly cloudy, with a low around 38. Chance of precipitation is 80%.
A chance of rain showers. Partly sunny, with a high near 52. Chance of precipitation is 30%.
Partly cloudy, with a low around 35.
A slight chance of rain showers after noon. Sunny, with a high near 56. Chance of precipitation is 20%.
Partly cloudy, with a low around 37.
Mostly sunny, with a high near 56.
Partly cloudy, with a low around 38.
A slight chance of rain showers after noon. Mostly sunny, with a high near 56. Chance of precipitation is 20%.
Partly cloudy, with a low around 38.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Rain Showers
|
48°F |
10 to 16 mph
W
|
|
Wednesday Night
Apr 22
|
Rain Showers
|
38°F |
6 to 14 mph
WNW
|
|
Thursday
Apr 23
|
Chance Rain Showers
|
52°F |
6 to 12 mph
NW
|
|
Thursday Night
Apr 23
|
Partly Cloudy
|
35°F |
8 to 14 mph
NNW
|
|
Friday
Apr 24
|
Sunny then Slight Chance Rain Showers
|
56°F |
8 to 13 mph
N
|
|
Friday Night
Apr 24
|
Partly Cloudy
|
37°F |
8 to 13 mph
N
|
|
Saturday
Apr 25
|
Mostly Sunny
|
56°F |
7 mph
WNW
|
|
Saturday Night
Apr 25
|
Partly Cloudy
|
38°F |
7 mph
NW
|
|
Sunday
Apr 26
|
Mostly Sunny then Slight Chance Rain Showers
|
56°F |
7 mph
NNW
|
|
Sunday Night
Apr 26
|
Partly Cloudy
|
38°F |
7 mph
NNW
|
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.
