Johnson County, IA Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Johnson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a high near 82.
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 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 7:40 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnson County
Monday looks like the warmest upcoming period in Johnson County at 86 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph E.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 28, 2026 7:40 PM CDT
- Coverage
- 5 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
Mostly cloudy, with a low around 59.
Partly sunny, with a high near 83.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 58.
Mostly sunny, with a high near 85.
Mostly clear, with a low around 56.
Sunny, with a high near 85.
Mostly clear, with a low around 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Mostly Cloudy
|
82°F |
5 to 15 mph
E
|
|
Saturday Night
May 30
|
Mostly Cloudy
|
59°F |
10 mph
E
|
|
Sunday
May 31
|
Partly Sunny
|
83°F |
10 mph
SE
|
|
Sunday Night
May 31
|
Slight Chance Showers And Thunderstorms
|
58°F |
5 to 10 mph
SE
|
|
Monday
Jun 1
|
Chance Showers And Thunderstorms
|
86°F |
5 to 10 mph
E
|
|
Monday Night
Jun 1
|
Slight Chance Showers And Thunderstorms
|
58°F |
5 to 10 mph
E
|
|
Tuesday
Jun 2
|
Mostly Sunny
|
85°F |
5 to 10 mph
E
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
56°F |
5 to 10 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
85°F |
5 to 10 mph
SE
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
58°F |
5 to 10 mph
SE
|
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.
