McHenry County, IL Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across McHenry County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a high near 73. East wind 10 to 15 mph, with gusts as high as 25 mph.
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
- May 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 6:39 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in McHenry County
Monday looks like the warmest upcoming period in McHenry County at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph E.
The forecast from May 30 through Jun 3 stays mostly dry.
Forecast Details
- Last updated
- May 28, 2026 6:39 PM CDT
- Coverage
- 5 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
Mostly cloudy, with a low around 50.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 53.
Mostly sunny, with a high near 81.
Mostly clear, with a low around 53.
Sunny, with a high near 79.
Mostly clear, with a low around 52.
Sunny, with a high near 81.
Mostly clear, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Mostly Cloudy
|
73°F |
10 to 15 mph
E
|
|
Saturday Night
May 30
|
Mostly Cloudy
|
50°F |
5 to 15 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
76°F |
5 mph
ESE
|
|
Sunday Night
May 31
|
Partly Cloudy
|
53°F |
0 to 5 mph
NE
|
|
Monday
Jun 1
|
Mostly Sunny
|
81°F |
0 to 10 mph
NNE
|
|
Monday Night
Jun 1
|
Mostly Clear
|
53°F |
5 to 10 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
79°F |
5 to 10 mph
ENE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
52°F |
5 to 10 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
81°F |
5 to 10 mph
SE
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
57°F |
5 to 10 mph
SSE
|
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.
