Johnston City, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Johnston City, IL in one place.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 10am, then a chance of showers and thunderstorms between 10am and 5pm, then showers and thunderstorms. Partly sunny. High near 87, with temperatures falling to around 84 in the afternoon. South southwest wind around 5 mph. Chance of precipitation is 80%.
Local Weather Overview
This forecast page for Johnston City, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 10, 2026 7:03 PM CDT.
The active forecast window currently covers Jul 11 to Jul 16, 2026 for Johnston City, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 11 to Jul 16, 2026
- Latest sync
- Jul 10, 2026 7:03 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnston City
Thursday looks like the warmest upcoming period in Johnston City at 91 degrees F.
Sunday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Monday at about 3 to 9 mph ENE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 7:03 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KPAH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. South southeast wind 0 to 3 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 84. East northeast wind 2 to 7 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 68. Northeast wind 2 to 6 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. East northeast wind 3 to 9 mph.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 69. East wind 2 to 8 mph.
Mostly sunny, with a high near 88. East wind 2 to 8 mph.
Mostly clear, with a low around 70. East wind 0 to 5 mph.
Sunny, with a high near 90. South southeast wind 0 to 5 mph.
Mostly clear, with a low around 72. Southwest wind around 2 mph.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. West southwest wind 0 to 5 mph.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Southwest wind around 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
87°F |
5 mph
SSW
|
|
Saturday Night
Jul 11
|
Showers And Thunderstorms Likely
|
70°F |
0 to 3 mph
SSE
|
|
Sunday
Jul 12
|
Showers And Thunderstorms Likely
|
84°F |
2 to 7 mph
ENE
|
|
Sunday Night
Jul 12
|
Showers And Thunderstorms Likely
|
68°F |
2 to 6 mph
NE
|
|
Monday
Jul 13
|
Mostly Sunny then Chance Showers And Thunderstorms
|
86°F |
3 to 9 mph
ENE
|
|
Monday Night
Jul 13
|
Chance Showers And Thunderstorms then Partly Cloudy
|
69°F |
2 to 8 mph
E
|
|
Tuesday
Jul 14
|
Mostly Sunny
|
88°F |
2 to 8 mph
E
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
0 to 5 mph
E
|
|
Wednesday
Jul 15
|
Sunny
|
90°F |
0 to 5 mph
SSE
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
72°F |
2 mph
SW
|
|
Thursday
Jul 16
|
Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
0 to 5 mph
WSW
|
|
Thursday Night
Jul 16
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
3 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnston City.