Johnson County, IA Weather Forecast
County weather hub
Sunny
Compare major city weather across Johnson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 69.
County Weather Overview
This county weather page brings together forecast coverage for Johnson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 6 of 6 mapped cities in Johnson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 11 to May 13, 2026
- Latest sync
- May 7, 2026 6:43 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnson County
Wednesday looks like the warmest upcoming period in Johnson County at 73 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Monday Night at about 5 to 15 mph E.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 7, 2026 6:43 PM CDT
- Coverage
- 3 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
Showers and thunderstorms likely after 7pm. Partly cloudy, with a low around 48. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 72. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 46.
Sunny, with a high near 73.
Mostly clear, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
May 11
|
Sunny
|
69°F |
0 to 5 mph
NE
|
|
Monday Night
May 11
|
Showers And Thunderstorms Likely
|
48°F |
5 to 15 mph
E
|
|
Tuesday
May 12
|
Showers And Thunderstorms Likely
|
72°F |
15 mph
SW
|
|
Tuesday Night
May 12
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
46°F |
5 to 15 mph
NW
|
|
Wednesday
May 13
|
Sunny
|
73°F |
5 to 10 mph
N
|
|
Wednesday Night
May 13
|
Mostly Clear
|
49°F |
5 to 10 mph
E
|
Major City Forecasts
Live forecast snapshots for major cities across Johnson County.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in Johnson County.
Largest mapped city population in this region: 75,130.
