McHenry County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Compare major city weather across McHenry County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms likely before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 79.
County Weather Overview
This county weather page brings together forecast coverage for McHenry County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 17 of 17 mapped cities in McHenry County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 14 to Apr 16, 2026
- Latest sync
- Apr 10, 2026 11:02 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in McHenry County
Tuesday looks like the warmest upcoming period in McHenry County at 79 degrees F.
Thursday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Wednesday at about 15 to 20 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 10, 2026 11:02 AM CDT
- Coverage
- 3 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
Showers and thunderstorms. Mostly cloudy, with a low around 59.
A chance of showers and thunderstorms. Partly sunny, with a high near 71.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
A chance of rain showers. Mostly sunny, with a high near 75.
A chance of rain showers. Partly cloudy, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Apr 14
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
79°F |
15 mph
SW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms
|
59°F |
15 mph
SSW
|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms
|
71°F |
15 to 20 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
51°F |
10 to 15 mph
WSW
|
|
Thursday
Apr 16
|
Chance Rain Showers
|
75°F |
10 to 15 mph
SSW
|
|
Thursday Night
Apr 16
|
Chance Rain Showers
|
50°F |
10 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across McHenry County.
Coverage
Forecast coverage currently spans 17 of 17 mapped cities in McHenry County.
Largest mapped city population in this region: 39,642.
