Water Temperature of the Fox River in McHenry, IL

Current Water Temperature

32.0°F

Measurement Time: Monday, July 27, 2026, 6:13 AM 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

94.1°F
Sunny
Sunny
118.6°F
117.2°F
69%
SW 11 mph
13.6 mph
94.1°F
82.4°F
0 in
1%
5 mi
1008 mbar
7.5

Five Day Weather Forecast

Sunny
Mon
H: 103°F
L: 76°F
Sunny
Tue
H: 81°F
L: 63°F
Sunny
Wed
H: 85°F
L: 62°F
Sunny
Thu
H: 86°F
L: 66°F
Mist
Fri
H: 71°F
L: 66°F

Air Quality

AQI: 1 - Good
PM2.5: 8.9 μg/m3
PM10: 9.2 μg/m3
Carbon Monoxide: 147 μg/m3
Nitrogen Dioxide: 5.5 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:00 PM
Sunset: 8:18 PM
Daylight: 14 hrs 37 mins
Moonrise: 7:33 PM
Moon Transit: 11:56 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

11:15 AM - 1:45 PM
12:00 AM - 12:00 AM

Minor Periods

7:03 PM - 8:33 PM
2:52 AM - 4:22 AM

Action Rating: 3 out of 5

Heat Advisory issued July 27 at 3:02AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 3:02 AM
Expires: Mon July 27, 2026, 1:15 PM

* WHAT...Peak heat index values up to 100 to 110 degrees expected. * WHERE...Portions of east central and northeast Illinois and northwest Indiana. * WHEN...Until 9 PM CDT /10 PM EDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Heat Advisory issued July 27 at 5:48AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 5:48 AM
Expires: Mon July 27, 2026, 4:00 PM

* WHAT...Peak heat index values up to 100 to 110 degrees expected. * WHERE...Iroquois, Central Cook, DuPage, Eastern Will, Kankakee, Lake IL, Northern Cook, Northern Will, Southern Cook, and Southern Will Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Beach Hazards Statement issued July 27 at 3:57AM CDT until July 29 at 10:00AM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 3:57 AM
Expires: Mon July 27, 2026, 12:00 PM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 9 ft expected. * WHERE...In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN...From late tonight through Wednesday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.
Monday, July 27, 2026

Weather Forecast

Sunny
102.9°F
75.7°F
87°F
72%
0.13 in
57%
0%
19.7 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 6.58 μg/m3
PM10: 7.02 μg/m3
Carbon Monoxide: 153.83 μg/m3
Nitrogen Dioxide: 8.88 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 82.96 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:00 PM
Sunset: 8:18 PM
Daylight: 14 hrs 37 mins
Moonrise: 7:33 PM
Moon Transit: 11:56 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

11:15 AM - 1:45 PM
12:00 AM - 12:00 AM

Minor Periods

7:03 PM - 8:33 PM
2:52 AM - 4:22 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
81.1°F
63.2°F
72°F
70%
0 in
7%
0%
14.3 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 6.34 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 147.21 μg/m3
Nitrogen Dioxide: 4.41 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 74.17 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:00 PM
Sunset: 8:17 PM
Daylight: 14 hrs 35 mins
Moonrise: 8:07 PM
Moon Transit: 12:00 AM
Moonset: 4:24 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:05 AM - 2:35 PM

Minor Periods

7:37 PM - 9:07 PM
3:54 AM - 5:24 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
84.6°F
61.6°F
72.7°F
62%
0 in
4%
0%
10.3 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 5.34 μg/m3
PM10: 5.53 μg/m3
Carbon Monoxide: 141.67 μg/m3
Nitrogen Dioxide: 6.9 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 66.46 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:00 PM
Sunset: 8:16 PM
Daylight: 14 hrs 33 mins
Moonrise: 8:35 PM
Moon Transit: 12:44 AM
Moonset: 5:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:14 AM - 2:44 AM
12:52 AM - 3:22 PM

Minor Periods

8:05 PM - 9:35 PM
4:59 AM - 6:29 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
85.5°F
65.6°F
75.4°F
74%
0 in
8%
0%
12.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.75 μg/m3
PM10: 8.99 μg/m3
Carbon Monoxide: 211.51 μg/m3
Nitrogen Dioxide: 13.93 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 76.46 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:00 PM
Sunset: 8:15 PM
Daylight: 14 hrs 31 mins
Moonrise: 8:59 PM
Moon Transit: 1:31 AM
Moonset: 6:36 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
1:38 PM - 4:08 PM

Minor Periods

8:29 PM - 9:59 PM
6:06 AM - 7:36 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Mist
70.6°F
65.5°F
67.6°F
93%
0.31 in
86%
0%
8.9 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 6.83 μg/m3
PM10: 7.03 μg/m3
Carbon Monoxide: 251.63 μg/m3
Nitrogen Dioxide: 12.81 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 60.75 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:00 PM
Sunset: 8:14 PM
Daylight: 14 hrs 29 mins
Moonrise: 9:20 PM
Moon Transit: 2:15 AM
Moonset: 7:42 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
2:22 PM - 4:52 PM

Minor Periods

8:50 PM - 10:20 PM
7:12 AM - 8:42 AM

Action Rating: 3 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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