Johnsburg, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Johnsburg, IL in one place.
A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms between 8am and 1pm. Partly sunny, with a high near 85. West southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
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: Jun 8, 2026 9:42 PM CDT.
The active forecast window currently covers Jun 9 to Jun 15, 2026 for Johnsburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 15, 2026
- Latest sync
- Jun 8, 2026 9:42 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnsburg
Wednesday looks like the warmest upcoming period in Johnsburg at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 20 mph SSW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 9:42 PM CDT
- Coverage
- 7 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 after 1am. Mostly cloudy, with a low around 66. South wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 90. Heat index values as high as 100. South southwest wind 5 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. Southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 80%.
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 58.
Sunny, with a high near 81.
Mostly clear, with a low around 60.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 83.
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54.
A chance of rain showers. Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
85°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 9
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
66°F |
5 mph
S
|
|
Wednesday
Jun 10
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
90°F |
5 to 20 mph
SSW
|
|
Wednesday Night
Jun 10
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
69°F |
10 to 20 mph
SW
|
|
Thursday
Jun 11
|
Showers And Thunderstorms
|
86°F |
5 to 20 mph
SSW
|
|
Thursday Night
Jun 11
|
Showers And Thunderstorms
|
58°F |
5 to 15 mph
WSW
|
|
Friday
Jun 12
|
Sunny
|
81°F |
5 to 15 mph
W
|
|
Friday Night
Jun 12
|
Mostly Clear
|
60°F |
5 to 10 mph
WSW
|
|
Saturday
Jun 13
|
Sunny then Slight Chance Showers And Thunderstorms
|
83°F |
5 to 10 mph
WSW
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
59°F |
0 to 10 mph
WNW
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
76°F |
5 to 10 mph
NNW
|
|
Sunday Night
Jun 14
|
Slight Chance Showers And Thunderstorms
|
54°F |
0 to 10 mph
WNW
|
|
Monday
Jun 15
|
Chance Rain Showers
|
76°F |
0 to 10 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnsburg.
