Johannisburg, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Johannisburg, IL in one place.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. North wind around 2 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Johannisburg, 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 17, 2026 7:53 PM CDT.
The active forecast window currently covers Jul 19 to Jul 23, 2026 for Johannisburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 19 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 7:53 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Johannisburg
Tuesday looks like the warmest upcoming period in Johannisburg at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 12 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 7:53 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 70. Chance of precipitation is 50%.
Sunny, with a high near 93.
Mostly clear, with a low around 76.
Sunny, with a high near 95.
Mostly clear, with a low around 70.
Sunny, with a high near 85.
Mostly clear, with a low around 62.
Mostly sunny, with a high near 84.
Partly cloudy, with a low around 65.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Jul 19
|
Mostly Sunny then Chance Showers And Thunderstorms
|
90°F |
2 mph
N
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms then Mostly Clear
|
70°F |
2 mph
E
|
|
Monday
Jul 20
|
Sunny
|
93°F |
3 mph
S
|
|
Monday Night
Jul 20
|
Mostly Clear
|
76°F |
6 mph
S
|
|
Tuesday
Jul 21
|
Sunny
|
95°F |
6 to 12 mph
W
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
70°F |
6 to 12 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
85°F |
6 to 10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
62°F |
2 to 10 mph
NE
|
|
Thursday
Jul 23
|
Mostly Sunny
|
84°F |
5 mph
NE
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
65°F |
3 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johannisburg.