Water Temperature of the Fox River in McHenry, IL

Current Water Temperature

32.0°F

Measurement Time: Wednesday, July 15, 2026, 1:13 PM CDT

Temperature Locations

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Fox River

Station Name: FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 728 feet

Nearest Address:
Charles J Miller Rd
McHenry, IL 60051
McHenry County

GPS Coordinates: 42.3233333, -88.2516667

Nearby Water Temperatures

Fox River, Burlington, WI (19.9 mi)
Lake Michigan, Waukegan, IL (23.5 mi)
Lake Michigan, Winthrop Harbor, IL (26.8 mi)
Lake Michigan, Wilmette, IL (33.2 mi)
Eagle Spring Lake, Mukwonago, WI (37.8 mi)
Root River, Franklin, WI (39.1 mi)
Lake Michigan, Racine, WI (40.4 mi)
Chicago River, Chicago, IL (44.4 mi)
Lake Michigan, Chicago, IL (46.2 mi)
Chicago Sanitary and Ship Canal, Romeoville, IL (48.2 mi)
Honey Creek, Wauwatosa, WI (51.3 mi)
Lake Michigan, Milwaukee, WI (51.7 mi)
Des Plaines River, Lockport, IL (52.8 mi)
Rock River, Byron, IL (53.2 mi)
Des Plaines River, Joliet, IL (55.1 mi)

Weather for McHenry, Illinois

Current Weather

90°F
Sunny
Sunny
95.3°F
104.7°F
62%
WNW 5.1 mph
6.8 mph
94.5°F
72.7°F
0 in
0%
9 mi
1017 mbar
1.2

Five Day Weather Forecast

Sunny
Wed
H: 100°F
L: 71°F
Sunny
Thu
H: 88°F
L: 70°F
Sunny
Fri
H: 85°F
L: 69°F
Sunny
Sat
H: 88°F
L: 66°F
Partly Cloudy
Sun
H: 78°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 4.7 μg/m3
PM10: 6.1 μg/m3
Carbon Monoxide: 144 μg/m3
Nitrogen Dioxide: 1.9 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 128 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:00 PM
Sunset: 8:28 PM
Daylight: 14 hrs 59 mins
Moonrise: 6:47 AM
Moon Transit: 2:21 PM
Moonset: 9:40 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
1:51 PM - 4:21 PM

Minor Periods

9:10 PM - 10:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Air Quality Alert issued July 15 at 12:19PM CDT by NWS Chicago IL

Effective: Wed July 15, 2026, 12:19 PM
Expires: Thu July 16, 2026, 12:00 AM

The Illinois Environmental Protection Agency has issued a Red Forecast Air Pollution Action Day for Thursday July 16th for the AirNow AQI forecast sectors of Rockford and all 6 Chicago area forecast sectors. This is in addition to the ongoing Chicago Area Air Pollution Action Day in effect today. This Red Forecast Air Pollution Action Day is declared due to a forecast of Unhealthy-Red category particulates and or ozone on Thursday July 16th. Northern IL is expected to be on the edge of a thick plume of surface smoke moving in from the north and cleaner air to the south. There is some uncertainty in how far south the smoke progresses and the duration of the poor air quality as this dividing line may meander in and out of Northern IL late Wednesday night thru Friday. With this in mind, those with air quality concerns or outdoor plans are encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov. Unhealthy - Everyone should reduced prolonged activities or heavy exertion outdoors. Active children, older adults, and people with pulmonary or respiratory disease such as asthma should avoid prolonged activities or heavy exertion outdoors. Area residents are urged to reduce pollution levels. Air quality forecasts, current air quality, and tips on how you can reduce your emissions can be found at www.airnow.gov. Media contact...Illinois EPA.


Wednesday, July 15, 2026

Weather Forecast

Sunny
100.2°F
71.1°F
84.9°F
64%
0 in
4%
0%
6.9 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 4.73 μg/m3
PM10: 5.37 μg/m3
Carbon Monoxide: 154.04 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 95.63 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:00 PM
Sunset: 8:28 PM
Daylight: 14 hrs 59 mins
Moonrise: 6:47 AM
Moon Transit: 2:21 PM
Moonset: 9:40 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
1:51 PM - 4:21 PM

Minor Periods

9:10 PM - 10:40 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Sunny
88°F
69.6°F
78°F
70%
0.02 in
36%
0%
7.4 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 8.4 μg/m3
PM10: 9.18 μg/m3
Carbon Monoxide: 173.42 μg/m3
Nitrogen Dioxide: 9.82 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 108.33 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:00 PM
Sunset: 8:27 PM
Daylight: 14 hrs 57 mins
Moonrise: 8:07 AM
Moon Transit: 3:14 PM
Moonset: 10:07 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

2:32 AM - 5:02 AM
2:44 PM - 5:14 PM

Minor Periods

9:37 PM - 11:07 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Friday, July 17, 2026

Weather Forecast

Sunny
84.7°F
68.5°F
76.6°F
74%
0.26 in
69%
0%
7.2 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 6.07 μg/m3
PM10: 6.51 μg/m3
Carbon Monoxide: 159.08 μg/m3
Nitrogen Dioxide: 8.63 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 102.67 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 1:00 PM
Sunset: 8:27 PM
Daylight: 14 hrs 55 mins
Moonrise: 9:22 AM
Moon Transit: 4:02 PM
Moonset: 10:30 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

3:23 AM - 5:53 AM
3:32 PM - 6:02 PM

Minor Periods

10:00 PM - 11:30 PM
8:52 AM - 10:22 AM

Action Rating: 3 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
88.4°F
66.1°F
77°F
80%
0 in
11%
0%
17.7 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 3.55 μg/m3
PM10: 3.73 μg/m3
Carbon Monoxide: 151.35 μg/m3
Nitrogen Dioxide: 4.49 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 97.83 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:00 PM
Sunset: 8:26 PM
Daylight: 14 hrs 54 mins
Moonrise: 10:34 AM
Moon Transit: 4:48 PM
Moonset: 10:51 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:10 AM - 6:40 AM
4:18 PM - 6:48 PM

Minor Periods

10:21 PM - 11:51 PM
10:04 AM - 11:34 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Partly Cloudy
78.4°F
61°F
69.9°F
71%
0 in
9%
0%
11.2 mph
4.4


Air Quality

AQI: 1 - Good
PM2.5: 2.51 μg/m3
PM10: 2.56 μg/m3
Carbon Monoxide: 177.5 μg/m3
Nitrogen Dioxide: 2.58 μg/m3
Sulphur Dioxide: 0.43 μg/m3
Ozone: 84.5 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 1:00 PM
Sunset: 8:25 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:42 AM
Moon Transit: 5:31 PM
Moonset: 11:11 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

4:54 AM - 7:24 AM
5:01 PM - 7:31 PM

Minor Periods

12:00 AM - 12:00 AM
11:12 AM - 12:42 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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