Water Temperature of the Fox River in McHenry, IL

Current Water Temperature

32.0°F

Measurement Time: Monday, July 20, 2026, 9:08 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

77.7°F
Partly cloudy
Partly cloudy
79.3°F
95.9°F
69%
SW 11 mph
13.2 mph
89.4°F
70.3°F
0 in
50%
6 mi
1012 mbar
6.3

Five Day Weather Forecast

Sunny
Mon
H: 90°F
L: 56°F
Sunny
Tue
H: 80°F
L: 61°F
Sunny
Wed
H: 72°F
L: 49°F
Sunny
Thu
H: 77°F
L: 54°F
Sunny
Fri
H: 76°F
L: 59°F

Air Quality

AQI: 1 - Good
PM2.5: 20 μg/m3
PM10: 20.3 μg/m3
Carbon Monoxide: 229 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 134 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 51 mins
Moonrise: 12:49 AM
Moon Transit: 6:15 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:37 AM - 8:07 AM
5:45 PM - 8:15 PM

Minor Periods

12:19 AM - 1:49 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Dense Smoke Advisory issued July 20 at 2:43AM CDT until July 20 at 7:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon July 20, 2026, 2:43 AM
Expires: Mon July 20, 2026, 10:45 AM

* WHAT...For the Dense Smoke Advisory, dense smoke will reduce visibility to 1 NM. For the Small Craft Advisory, southwest winds 15 to 20 kt with gusts up to 25 kt expected. * WHERE...North Point Light to Wind Point WI. * WHEN...For the Dense Smoke Advisory, until 7 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 1 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.


Small Craft Advisory issued July 20 at 2:43AM CDT until July 21 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon July 20, 2026, 2:43 AM
Expires: Mon July 20, 2026, 10:45 AM

* WHAT...For the Dense Smoke Advisory, dense smoke will reduce visibility to 1 NM. For the Small Craft Advisory, southwest winds 15 to 20 kt with gusts up to 25 kt expected. * WHERE...North Point Light to Wind Point WI. * WHEN...For the Dense Smoke Advisory, until 7 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 1 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.


Small Craft Advisory issued July 20 at 8:57AM CDT until July 21 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon July 20, 2026, 8:57 AM
Expires: Mon July 20, 2026, 5:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt expected. * WHERE...Nearshore Waters from North Point Lighthouse to Wind Point. * WHEN...From 1 PM this afternoon to 1 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Monday, July 20, 2026

Weather Forecast

Sunny
90.3°F
56.3°F
73.9°F
73%
0.05 in
57%
0%
13.9 mph
6.7


Air Quality

AQI: 2 - Moderate
PM2.5: 25.7 μg/m3
PM10: 26.08 μg/m3
Carbon Monoxide: 233.67 μg/m3
Nitrogen Dioxide: 9.9 μg/m3
Sulphur Dioxide: 2.69 μg/m3
Ozone: 96.25 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 51 mins
Moonrise: 12:49 AM
Moon Transit: 6:15 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:37 AM - 8:07 AM
5:45 PM - 8:15 PM

Minor Periods

12:19 AM - 1:49 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
80.3°F
60.6°F
72.6°F
78%
0.08 in
60%
0%
17.4 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 3 μg/m3
PM10: 3.12 μg/m3
Carbon Monoxide: 148.63 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 86.58 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 49 mins
Moonrise: 1:54 PM
Moon Transit: 7:00 PM
Moonset: 12:32 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
6:30 PM - 9:00 PM

Minor Periods

1:24 PM - 2:54 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
72°F
48.8°F
61.1°F
69%
0 in
7%
0%
13.2 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 7.41 μg/m3
PM10: 7.72 μg/m3
Carbon Monoxide: 134.71 μg/m3
Nitrogen Dioxide: 3.04 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 79.67 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 47 mins
Moonrise: 3:00 PM
Moon Transit: 7:45 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

7:06 AM - 9:36 AM
7:15 PM - 9:45 PM

Minor Periods

2:30 PM - 4:00 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
76.9°F
54.2°F
65.2°F
73%
0 in
11%
0%
8.5 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 10.22 μg/m3
PM10: 10.56 μg/m3
Carbon Monoxide: 186.64 μg/m3
Nitrogen Dioxide: 12.34 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 76.17 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 4:05 PM
Moon Transit: 8:32 PM
Moonset: 12:24 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:53 AM - 10:23 AM
8:02 PM - 10:32 PM

Minor Periods

3:35 PM - 5:05 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
75.9°F
59.1°F
66.6°F
77%
0.02 in
36%
0%
6.9 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 9.63 μg/m3
PM10: 9.84 μg/m3
Carbon Monoxide: 245.13 μg/m3
Nitrogen Dioxide: 25.1 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 39.63 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:21 PM
Daylight: 14 hrs 43 mins
Moonrise: 5:06 PM
Moon Transit: 9:22 PM
Moonset: 12:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:42 AM - 11:12 AM
8:52 PM - 11:22 PM

Minor Periods

4:36 PM - 6:06 PM
12:27 AM - 1:57 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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