Johnsburg, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johnsburg, IL in one place.
A slight chance of rain showers between 7am and 9am. Partly sunny. High near 66, with temperatures falling to around 63 in the afternoon. East wind around 5 mph. Chance of precipitation is 20%.
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: Sep 24, 2026 11:09 AM CDT.
The active forecast window currently covers Sep 25 to Sep 30, 2026 for Johnsburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 25 to Sep 30, 2026
- Latest sync
- Sep 24, 2026 11:09 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnsburg
Tuesday looks like the warmest upcoming period in Johnsburg at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 10 mph SSW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 24, 2026 11:09 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
Partly cloudy, with a low around 50. East northeast wind around 5 mph.
Mostly sunny, with a high near 67. East wind around 5 mph, with gusts as high as 10 mph.
Mostly cloudy, with a low around 50.
Partly sunny, with a high near 68.
Mostly cloudy, with a low around 50.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 52.
A chance of rain showers after 1pm. Mostly sunny, with a high near 70.
A chance of rain showers before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 58.
Showers and thunderstorms likely. Mostly cloudy, with a high near 68.
A chance of rain showers. Mostly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Sep 25
|
Slight Chance Rain Showers then Partly Sunny
|
66°F |
5 mph
E
|
|
Friday Night
Sep 25
|
Partly Cloudy
|
50°F |
5 mph
ENE
|
|
Saturday
Sep 26
|
Mostly Sunny
|
67°F |
5 mph
E
|
|
Saturday Night
Sep 26
|
Mostly Cloudy
|
50°F |
0 to 5 mph
NE
|
|
Sunday
Sep 27
|
Partly Sunny
|
68°F |
0 to 5 mph
E
|
|
Sunday Night
Sep 27
|
Mostly Cloudy
|
50°F |
0 mph
|
|
Monday
Sep 28
|
Mostly Sunny
|
69°F |
0 mph
|
|
Monday Night
Sep 28
|
Partly Cloudy
|
52°F |
0 mph
|
|
Tuesday
Sep 29
|
Mostly Sunny then Chance Rain Showers
|
70°F |
0 to 5 mph
S
|
|
Tuesday Night
Sep 29
|
Showers And Thunderstorms Likely
|
58°F |
5 mph
S
|
|
Wednesday
Sep 30
|
Showers And Thunderstorms Likely
|
68°F |
5 to 10 mph
SSW
|
|
Wednesday Night
Sep 30
|
Chance Rain Showers
|
56°F |
5 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnsburg.
