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. High near 81, with temperatures falling to around 79 in the afternoon. West wind 5 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
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 9:03 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 81 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 15 to 20 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 9:03 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
Rain showers after 7pm. Mostly cloudy, with a low around 60. North wind 0 to 5 mph. Chance of precipitation is 80%.
Rain showers before 1pm. Mostly cloudy, with a high near 69. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
A chance of rain showers after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
A chance of rain showers before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 66.
Rain showers likely before 1am. Mostly cloudy, with a low around 46.
Partly sunny, with a high near 56.
Partly cloudy, with a low around 34.
Sunny, with a high near 55.
Mostly clear, with a low around 37.
Sunny, with a high near 62.
Partly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Sunny
|
81°F |
5 to 15 mph
W
|
|
Tuesday Night
Oct 13
|
Rain Showers
|
60°F |
0 to 5 mph
N
|
|
Wednesday
Oct 14
|
Rain Showers
|
69°F |
5 to 10 mph
NE
|
|
Wednesday Night
Oct 14
|
Mostly Cloudy then Chance Rain Showers
|
52°F |
5 to 10 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms Likely
|
66°F |
10 mph
ENE
|
|
Thursday Night
Oct 15
|
Rain Showers Likely
|
46°F |
5 to 15 mph
NNW
|
|
Friday
Oct 16
|
Partly Sunny
|
56°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
34°F |
0 to 15 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
55°F |
0 to 5 mph
WNW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
37°F |
5 to 10 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
62°F |
10 to 15 mph
SSW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
44°F |
5 to 10 mph
SSW
|
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.
