Johnson County, IA Weather Forecast
County weather hub
Patchy Fog
Compare major city weather across Johnson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Patchy fog after 3am. Clear, with a low around 70. Northwest wind around 0 mph.
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
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 3:40 AM 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 93 degrees F.
Monday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 3:40 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
Patchy fog before 9am. Sunny, with a high near 93. Northwest wind 0 to 5 mph.
Partly cloudy, with a low around 72. Southwest wind 0 to 5 mph.
Sunny, with a high near 92. Southwest wind 0 to 5 mph.
Mostly clear, with a low around 73.
A chance of showers and thunderstorms after 7am. Sunny, with a high near 92. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Chance of precipitation is 40%.
Sunny, with a high near 93.
Mostly clear, with a low around 71.
Sunny, with a high near 92.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 91.
Mostly clear, with a low around 69.
Sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 15
|
Patchy Fog
|
70°F |
0 mph
|
|
Wednesday
Jul 15
|
Patchy Fog then Sunny
|
93°F |
0 to 5 mph
NW
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
72°F |
0 to 5 mph
SW
|
|
Thursday
Jul 16
|
Sunny
|
92°F |
0 to 5 mph
SW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
73°F |
0 to 5 mph
S
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
92°F |
0 to 5 mph
SW
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Mostly Clear
|
73°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
93°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
71°F |
5 to 10 mph
N
|
|
Sunday
Jul 19
|
Sunny
|
92°F |
5 mph
SE
|
|
Sunday Night
Jul 19
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
72°F |
5 mph
S
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
91°F |
5 to 10 mph
W
|
|
Monday Night
Jul 20
|
Mostly Clear
|
69°F |
5 to 10 mph
NW
|
|
Tuesday
Jul 21
|
Sunny
|
86°F |
5 to 15 mph
NW
|
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.
