Weather for McHenry, Illinois
Current Weather
Humidity: 86%
Feels Like: 38.4°F
Wind: NE 4.3 mph
Wind Gusts: 5.5 mph
Precipitation: 0.01 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.2
Five Day Weather Forecast
Sat
H: 42°F
L: 33°F
Sun
H: 37°F
L: 28°F
Mon
H: 41°F
L: 23°F
Tue
H: 43°F
L: 24°F
Wed
H: 49°F
L: 38°F
Air Quality
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 66 μg/m3
Astronomical
Sun Transit: 11:36 AM
Sunset: 4:38 PM
Daylight: 10 hrs 2 mins
Moon Transit: 2:22 AM
Moonset: 10:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.7%
Best Times for Fishing or Hunting
Major Periods
1:52 AM - 4:22 AM2:40 PM - 5:10 PM
Minor Periods
6:41 PM - 8:11 PM10:12 AM - 11:42 AM
Action Rating: 2 out of 5
Winter Storm Watch issued November 8 at 2:53AM CST until November 10 at 12:00PM CST by NWS Chicago IL
Effective: Sat November 8, 2025, 2:53 AM
Expires: Sat November 8, 2025, 1:00 PM
* WHAT...Dangerous travel conditions due to intense lake effect snow possible. Localized snow rates in excess of 2 inches per hour, event snow totals in excess of 6 inches, and northerly wind gusts in excess of 35 mph are possible. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...From late Sunday night through Monday morning. * IMPACTS...Untreated roads, and especially bridges and overpasses, may become slick and hazardous. The combination of snow rates in excess of 2 inches per hour and northerly wind gusts in excess of 35 mph may greatly reduce visibility, especially along the Lake Michigan shoreline. * ADDITIONAL DETAILS...Lake effect snow is often very localized, with conditions varying from safe to dangerous across just a few miles.
Monitor the latest forecasts for updates on this situation.
Winter Storm Watch issued November 8 at 10:00AM CST until November 10 at 12:00PM CST by NWS Chicago IL
Effective: Sat November 8, 2025, 10:00 AM
Expires: Sat November 8, 2025, 8:00 PM
* WHAT...Dangerous travel conditions due to intense lake effect snow possible. Localized snow rates in excess of 2 inches per hour, event snow totals in excess of 6 inches, and northerly wind gusts in excess of 35 mph are possible. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...From late Sunday night through Monday morning. * IMPACTS...Untreated roads, and especially bridges and overpasses, may become slick and hazardous. The combination of snow rates in excess of 2 inches per hour and northerly wind gusts in excess of 35 mph may greatly reduce visibility, especially along the Lake Michigan shoreline. * ADDITIONAL DETAILS...Lake effect snow is often very localized, with conditions varying from safe to dangerous across just a few miles.
Monitor the latest forecasts for updates on this situation.
Weather Forecast
Average Temperature: 41.6°F
Average Humidity: 86%
Wind: 17.2 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 7.29 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 55.12 μg/m3
Astronomical
Sun Transit: 11:36 AM
Sunset: 4:38 PM
Daylight: 10 hrs 2 mins
Moon Transit: 2:22 AM
Moonset: 10:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.7%
Best Times for Fishing or Hunting
Major Periods
1:52 AM - 4:22 AM2:40 PM - 5:10 PM
Minor Periods
6:41 PM - 8:11 PM10:12 AM - 11:42 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 31.3°F
Average Humidity: 72%
Wind: 19 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 4.66 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 63.8 μg/m3
Astronomical
Sun Transit: 11:36 AM
Sunset: 4:37 PM
Daylight: 10 hrs mins
Moon Transit: 3:27 AM
Moonset: 11:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%
Best Times for Fishing or Hunting
Major Periods
2:57 AM - 5:27 AM3:43 PM - 6:13 PM
Minor Periods
7:56 PM - 9:26 PM11:07 AM - 12:37 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 29.6°F
Average Humidity: 67%
Wind: 13.9 mph
UV Index: 0.3
Air Quality
Nitrogen Dioxide: 3.82 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 65.44 μg/m3
Astronomical
Sun Transit: 11:36 AM
Sunset: 4:36 PM
Daylight: 9 hrs 58 mins
Moon Transit: 4:28 AM
Moonset: 12:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.0%
Best Times for Fishing or Hunting
Major Periods
3:58 AM - 6:28 AM4:41 PM - 7:11 PM
Minor Periods
9:11 PM - 10:41 PM11:49 AM - 1:19 PM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 35.5°F
Average Humidity: 63%
Wind: 21.9 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 8.09 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 48.84 μg/m3
Astronomical
Sun Transit: 11:37 AM
Sunset: 4:35 PM
Daylight: 9 hrs 55 mins
Moon Transit: 5:23 AM
Moonset: 12:52 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%
Best Times for Fishing or Hunting
Major Periods
4:53 AM - 7:23 AM5:32 PM - 8:02 PM
Minor Periods
10:25 PM - 11:55 PM12:22 AM - 1:52 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 40.8°F
Average Humidity: 69%
Wind: 20.1 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 9.67 μg/m3
Sulphur Dioxide: 2.09 μg/m3
Ozone: 45.38 μg/m3
Astronomical
Sun Transit: 11:37 AM
Sunset: 4:34 PM
Daylight: 9 hrs 53 mins
Moon Transit: 6:12 AM
Moonset: 1:17 PM
Moon Phase: Last Quarter
Moon Illumination: 45.8%
Best Times for Fishing or Hunting
Major Periods
5:42 AM - 8:12 AM6:19 PM - 8:49 PM
Minor Periods
12:00 AM - 12:00 AM12:47 AM - 2:17 PM
Action Rating: 2 out of 5