Water Temperature of the Fox River in McHenry, IL

Current Water Temperature

32.0°F

Measurement Time: Thursday, May 7, 2026, 9:49 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

59.9°F
Partly cloudy
Partly cloudy
59.9°F
58.7°F
30%
W 13.4 mph
15.4 mph
58.3°F
33.5°F
0 in
50%
9 mi
1010 mbar
3.4

Five Day Weather Forecast

Sunny
Thu
H: 62°F
L: 33°F
Patchy rain nearby
Fri
H: 65°F
L: 41°F
Patchy rain nearby
Sat
H: 62°F
L: 46°F
Sunny
Sun
H: 59°F
L: 40°F
Sunny
Mon
H: 58°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 10.15 μg/m3
PM10: 11.25 μg/m3
Carbon Monoxide: 159.85 μg/m3
Nitrogen Dioxide: 7.35 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:49 AM
Sunset: 7:59 PM
Daylight: 14 hrs 19 mins
Moonrise: 12:57 AM
Moon Transit: 5:18 AM
Moonset: 9:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
5:27 PM - 7:57 PM

Minor Periods

9:15 AM - 10:45 AM
12:27 AM - 1:57 AM

Action Rating: 3 out of 5

Frost Advisory issued May 7 at 12:48PM CDT until May 8 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu May 7, 2026, 12:48 PM
Expires: Thu May 7, 2026, 11:15 PM

* WHAT...Temperatures dropping into the lower to middle 30s will result in frost formation. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From 1 AM to 8 AM CDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Flood Warning issued May 6 at 9:54PM CDT until May 7 at 10:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Wed May 6, 2026, 9:54 PM
Expires: Thu May 7, 2026, 10:00 AM

...The Flood Warning is extended for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Winnebago and Rock Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until late tomorrow morning. * IMPACTS...At 9.0 feet, Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 9.1 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Wednesday was 9.2 feet. - Forecast...The river is expected to fall below flood stage early Thursday morning and continue falling to 7.6 feet by Wednesday, May 13. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued Thursday morning at 1000 AM CDT.
Thursday, May 7, 2026

Weather Forecast

Sunny
61.5°F
33.3°F
46.9°F
58%
0 in
0%
0%
16.3 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 6.14 μg/m3
PM10: 6.57 μg/m3
Carbon Monoxide: 158.97 μg/m3
Nitrogen Dioxide: 7.24 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 64.12 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:49 AM
Sunset: 7:59 PM
Daylight: 14 hrs 19 mins
Moonrise: 12:57 AM
Moon Transit: 5:18 AM
Moonset: 9:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
5:27 PM - 7:57 PM

Minor Periods

9:15 AM - 10:45 AM
12:27 AM - 1:57 AM

Action Rating: 3 out of 5

Friday, May 8, 2026

Weather Forecast

Patchy rain nearby
64.6°F
40.9°F
52.2°F
76%
0.05 in
84%
0%
11.6 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 17.94 μg/m3
PM10: 19.45 μg/m3
Carbon Monoxide: 201.45 μg/m3
Nitrogen Dioxide: 19.32 μg/m3
Sulphur Dioxide: 2.65 μg/m3
Ozone: 60.76 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:49 AM
Sunset: 8:00 PM
Daylight: 14 hrs 21 mins
Moonrise: 1:31 AM
Moon Transit: 6:06 AM
Moonset: 10:50 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%

Best Times for Fishing or Hunting

Major Periods

5:36 AM - 8:06 AM
6:15 PM - 8:45 PM

Minor Periods

10:20 AM - 11:50 AM
1:01 AM - 2:31 AM

Action Rating: 3 out of 5

Saturday, May 9, 2026

Weather Forecast

Patchy rain nearby
61.6°F
46°F
53.7°F
77%
0.01 in
89%
0%
14.1 mph
3


Air Quality

AQI: 2 - Moderate
PM2.5: 16.88 μg/m3
PM10: 18.39 μg/m3
Carbon Monoxide: 184.73 μg/m3
Nitrogen Dioxide: 9.79 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 72.84 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:49 AM
Sunset: 8:02 PM
Daylight: 14 hrs 24 mins
Moonrise: 1:59 AM
Moon Transit: 6:53 AM
Moonset: 11:56 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
7:00 PM - 9:30 PM

Minor Periods

11:26 AM - 12:56 AM
1:29 AM - 2:59 AM

Action Rating: 2 out of 5

Sunday, May 10, 2026

Weather Forecast

Sunny
58.9°F
39.8°F
49°F
64%
0 in
0%
0%
16.1 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 7.72 μg/m3
PM10: 8.25 μg/m3
Carbon Monoxide: 161.57 μg/m3
Nitrogen Dioxide: 6.95 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 70.92 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:49 AM
Sunset: 8:03 PM
Daylight: 14 hrs 26 mins
Moonrise: 2:24 AM
Moon Transit: 7:38 AM
Moonset: 1:04 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
7:45 PM - 10:15 PM

Minor Periods

12:34 AM - 2:04 PM
1:54 AM - 3:24 AM

Action Rating: 3 out of 5

Monday, May 11, 2026

Weather Forecast

Sunny
57.8°F
36.1°F
46.2°F
65%
0 in
0%
0%
10.7 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.64 μg/m3
PM10: 3.74 μg/m3
Carbon Monoxide: 169.54 μg/m3
Nitrogen Dioxide: 9.55 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 54.69 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:49 AM
Sunset: 8:04 PM
Daylight: 14 hrs 28 mins
Moonrise: 2:46 AM
Moon Transit: 8:23 AM
Moonset: 2:12 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

7:53 AM - 10:23 AM
12:00 AM - 12:00 AM

Minor Periods

1:42 PM - 3:12 PM
2:16 AM - 3:46 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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