Washington County, IA Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Washington County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy. Low around 36, with temperatures rising to around 39 overnight. Northwest wind around 15 mph, with gusts as high as 30 mph.
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 3 of 3 mapped cities in Washington County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 18 to Apr 24, 2026
- Latest sync
- Apr 18, 2026 4:50 AM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington County
Thursday looks like the warmest upcoming period in Washington County at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 18, 2026 4:50 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Sunny, with a high near 52. Northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Widespread frost after 3am. Mostly clear, with a low around 33. West wind 5 to 15 mph, with gusts as high as 25 mph.
Widespread frost before 8am. Sunny, with a high near 55. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Widespread frost after 2am. Mostly clear, with a low around 31.
Widespread frost before 9am. Sunny, with a high near 62.
Partly cloudy, with a low around 50.
Mostly sunny, with a high near 77.
Mostly clear, with a low around 53.
Sunny, with a high near 79.
Mostly clear, with a low around 59.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Showers and thunderstorms likely. Partly sunny, with a high near 68. Chance of precipitation is 70%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 18
|
Mostly Cloudy
|
36°F |
15 mph
NW
|
|
Saturday
Apr 18
|
Sunny
|
52°F |
15 to 20 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear then Widespread Frost
|
33°F |
5 to 15 mph
W
|
|
Sunday
Apr 19
|
Widespread Frost then Sunny
|
55°F |
5 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear then Widespread Frost
|
31°F |
5 to 15 mph
NE
|
|
Monday
Apr 20
|
Widespread Frost then Sunny
|
62°F |
5 to 15 mph
SE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
50°F |
15 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
77°F |
15 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
53°F |
5 to 10 mph
SW
|
|
Wednesday
Apr 22
|
Sunny
|
79°F |
5 to 15 mph
S
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
59°F |
10 to 15 mph
S
|
|
Thursday
Apr 23
|
Chance Showers And Thunderstorms
|
80°F |
15 to 20 mph
S
|
|
Thursday Night
Apr 23
|
Showers And Thunderstorms Likely
|
57°F |
15 to 20 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms Likely
|
68°F |
15 to 20 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Washington County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Washington County.
Largest mapped city population in this region: 1,401.
