Johnsburg, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Johnsburg, IL in one place.
Showers and thunderstorms likely. Cloudy, with a high near 81. South southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Johnsburg, 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: Aug 10, 2026 4:34 AM CDT.
The active forecast window currently covers Aug 11 to Aug 16, 2026 for Johnsburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 11 to Aug 16, 2026
- Latest sync
- Aug 10, 2026 4:34 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnsburg
Wednesday looks like the warmest upcoming period in Johnsburg at 82 degrees F.
Thursday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Friday at about 0 to 10 mph ENE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 10, 2026 4:34 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KMKX
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 10pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northeast wind 0 to 5 mph. Chance of precipitation is 50%.
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 66.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 75.
A chance of rain showers after 7pm. Mostly cloudy, with a low around 61.
A chance of rain showers. Partly sunny, with a high near 77.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Aug 11
|
Showers And Thunderstorms Likely
|
81°F |
5 mph
SSE
|
|
Tuesday Night
Aug 11
|
Chance Showers And Thunderstorms
|
66°F |
0 to 5 mph
NE
|
|
Wednesday
Aug 12
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
82°F |
0 to 5 mph
NW
|
|
Wednesday Night
Aug 12
|
Slight Chance Rain Showers then Partly Cloudy
|
66°F |
0 to 5 mph
N
|
|
Thursday
Aug 13
|
Chance Showers And Thunderstorms
|
78°F |
0 to 5 mph
NE
|
|
Thursday Night
Aug 13
|
Chance Showers And Thunderstorms
|
61°F |
0 to 5 mph
NE
|
|
Friday
Aug 14
|
Slight Chance Showers And Thunderstorms
|
75°F |
0 to 10 mph
ENE
|
|
Friday Night
Aug 14
|
Chance Rain Showers
|
61°F |
0 to 5 mph
E
|
|
Saturday
Aug 15
|
Chance Rain Showers
|
77°F |
5 to 10 mph
SSE
|
|
Saturday Night
Aug 15
|
Chance Showers And Thunderstorms
|
63°F |
0 to 5 mph
SSW
|
|
Sunday
Aug 16
|
Chance Showers And Thunderstorms
|
77°F |
0 to 5 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnsburg.
