Johannisburg, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johannisburg, IL in one place.
Sunny, with a high near 65.
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: Apr 16, 2026 8:22 PM CDT.
The active forecast window currently covers Apr 19 to Apr 23, 2026 for Johannisburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 19 to Apr 23, 2026
- Latest sync
- Apr 16, 2026 8:22 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Johannisburg
Thursday looks like the warmest upcoming period in Johannisburg at 78 degrees F.
Sunday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Sunday at about 6 to 14 mph NW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Apr 16, 2026 8:22 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
Mostly clear, with a low around 41.
Sunny, with a high near 71.
Mostly clear, with a low around 52.
Sunny, with a high near 77.
Partly cloudy, with a low around 56.
Mostly sunny, with a high near 77.
Mostly clear, with a low around 56.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 19
|
Sunny
|
65°F |
6 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
41°F |
3 to 8 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
71°F |
3 to 8 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
52°F |
9 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
77°F |
8 to 14 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
56°F |
6 to 10 mph
SW
|
|
Wednesday
Apr 22
|
Mostly Sunny
|
77°F |
6 to 9 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
56°F |
8 mph
S
|
|
Thursday
Apr 23
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
78°F |
6 to 12 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johannisburg.