Johnson County, IN Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Johnson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny, with a high near 77. East wind around 6 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 8 of 8 mapped cities in Johnson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 29 to May 31, 2026
- Latest sync
- May 25, 2026 9:56 AM EDT
- Forecast office
- IND
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnson County
Friday looks like the warmest upcoming period in Johnson County at 77 degrees F.
Sunday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Saturday at about 7 to 12 mph ENE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- May 25, 2026 9:56 AM EDT
- Coverage
- 3 days
- Time zone
- America/Indiana/Indianapolis
- Forecast office
- IND
- Radar station
- KIND
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. East northeast wind around 6 mph.
A slight chance of showers and thunderstorms after 8am. Partly sunny, with a high near 74. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 56. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
May 29
|
Mostly Sunny
|
77°F |
6 mph
E
|
|
Friday Night
May 29
|
Mostly Cloudy
|
59°F |
6 mph
ENE
|
|
Saturday
May 30
|
Slight Chance Showers And Thunderstorms
|
74°F |
7 to 12 mph
ENE
|
|
Saturday Night
May 30
|
Slight Chance Showers And Thunderstorms
|
57°F |
10 mph
ENE
|
|
Sunday
May 31
|
Slight Chance Showers And Thunderstorms
|
75°F |
8 to 12 mph
NE
|
|
Sunday Night
May 31
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
56°F |
6 to 9 mph
NE
|
Major City Forecasts
Live forecast snapshots for major cities across Johnson County.
Coverage
Forecast coverage currently spans 8 of 8 mapped cities in Johnson County.
Largest mapped city population in this region: 60,279.
