McHenry County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across McHenry County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 94. West northwest wind 0 to 5 mph, with gusts as high as 10 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
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 8:17 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 94 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph SW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 8:17 AM 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 clear, with a low around 72.
Sunny, with a high near 93.
Mostly clear, with a low around 68.
Sunny, with a high near 90.
Partly cloudy, with a low around 69.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 89.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 69.
A slight chance of rain showers before 1pm. Mostly sunny, with a high near 88.
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
94°F |
0 to 5 mph
WNW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
72°F |
5 mph
WNW
|
|
Wednesday
Jul 15
|
Sunny
|
93°F |
5 to 10 mph
NNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
68°F |
0 to 10 mph
NE
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
0 to 5 mph
NNE
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
69°F |
5 mph
E
|
|
Friday
Jul 17
|
Slight Chance Rain Showers
|
89°F |
5 to 10 mph
SSE
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
S
|
|
Saturday
Jul 18
|
Slight Chance Rain Showers
|
88°F |
5 to 15 mph
SW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
W
|
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.
