Water Temperature of the Fox River in McHenry, IL

Current Water Temperature

32.0°F

Measurement Time: Tuesday, April 21, 2026, 6:39 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

53.1°F
Clear
Clear
51.3°F
58.7°F
89%
W 6 mph
12.7 mph
58.5°F
53.5°F
0 in
0%
9 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 79°F
L: 44°F
Sunny
Wed
H: 70°F
L: 51°F
Patchy rain nearby
Thu
H: 76°F
L: 53°F
Heavy rain
Fri
H: 65°F
L: 51°F
Sunny
Sat
H: 61°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 16.25 μg/m3
PM10: 16.85 μg/m3
Carbon Monoxide: 258.85 μg/m3
Nitrogen Dioxide: 24.75 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 28 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 12:51 AM
Sunset: 7:41 PM
Daylight: 13 hrs 39 mins
Moonrise: 8:50 AM
Moon Transit: 5:06 PM
Moonset: 12:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:36 PM - 7:06 PM

Minor Periods

8:20 AM - 9:50 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Flood Warning issued April 20 at 4:39PM CDT until April 29 at 1:00PM CDT by NWS Chicago IL

Effective: Mon April 20, 2026, 4:39 PM
Expires: Wed April 29, 2026, 1:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 438 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to rise slowly. Water levels exceeded moderate flood stage earlier today. The latest forecast from the Illinois Department of Natural Resources indicates that water levels may near major flood stage by the middle of this week. - Water levels are expected to remain above flood stage at least through the middle of next week, assuming no additional rainfall occurs. Impacts from this flood may be similar to those experienced in May of 1973, October of 1986, or June of 2008. - Some locations that will experience flooding include areas along the Fox River Chain of Lakes, including Nippersink Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie, Channel Lake, and Lake Catherine. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.


Flood Warning issued April 21 at 11:32AM CDT by NWS Chicago IL

Effective: Tue April 21, 2026, 11:32 AM
Expires: Wed April 22, 2026, 5:45 AM

...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kendall and Kane Counties. Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, Kane and McHenry Counties. For the Fox River (Illinois)...including Montgomery, Algonquin Lock & Dam tailwater...Major flooding is forecast. * WHAT...Moderate flooding is occurring and major flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge. * WHEN...Until further notice. * IMPACTS...At 11.5 feet, Residences threatened along Oceola Drive in Algonquin. A few residences threatened along McBridge Street in Elgin. Jayne Street and Beach Drive threatened in Algonquin. River Street threatened in East Dundee. Jerusha Avenue threatened in Elgin. Fox River Trail threatened between East Dundee and Elgin. At 12.0 feet, Structures threatened along River Street, Johnson Street, and Maiden Lane in East Dundee. North Harrison Street threatened near Riverside Park in Algonquin. Washington Street threatened in Carpentersville. Water Street, Edwards Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road threatened in Elgin. Low-lying areas of Festival Park are threatened in Elgin. * ADDITIONAL DETAILS... - At 10:30 AM CDT Tuesday the stage was 11.8 feet. - Recent Activity...The river stage continues to gradually rise. - Forecast...The river is expected to gradually rise and reach Major flood stage late this week. - Flood stage is 9.5 feet. - Flood History...This crest compares to a previous crest of 11.8 feet on 05/23/2020. - http://www.weather.gov/safety/flood

These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.


Flood Warning issued April 21 at 6:04PM CDT until April 29 at 1:00PM CDT by NWS Chicago IL

Effective: Tue April 21, 2026, 6:04 PM
Expires: Wed April 29, 2026, 1:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and areas of park land are flooding along the Fox River Chain of Lakes. Flooding will continue through at least the middle of next week. * ADDITIONAL DETAILS... - At 600 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to climb slowly. The rate of climb has slowed since yesterday. Water levels on Channel Lake exceeded major flood stage yesterday and water levels on Fox Lake and Nippersink Lake exceeded major flood stage today. The latest forecast from the Illinois Department of Natural Resources indicates that water levels are near crest. - Water levels are expected to remain above flood stage at least through the middle of next week, assuming no additional rainfall occurs. Impacts from this flood are likely to be similar to those experienced in May of 1973, April 1979, or October of 1986, which each crested at similar levels. - Some locations that will experience flooding include areas along the Fox River Chain of Lakes, including Nippersink Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie, Channel Lake, and Lake Catherine. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.


Flood Warning issued April 21 at 11:41AM CDT by NWS Chicago IL

Effective: Tue April 21, 2026, 11:41 AM
Expires: Wed April 22, 2026, 5:45 AM

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Lake IL and Cook Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. For the Des Plaines River...including Des Plaines, Russell, Lincolnshire, Gurnee...Moderate flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Des Plaines River from IL/WI state line downstream to US-41 in Gurnee, including the Russell gauge. * WHEN...Until further notice. * IMPACTS...At 9.5 feet, Residential structures threatened along Russell Road between the river and Kilbourne Road. Industrial parking lots threatened along Kilbourne Road. * ADDITIONAL DETAILS... - At 10:30 AM CDT Tuesday the stage was 8.9 feet. - Recent Activity...The river stage fell below moderate flood stage overnight and continues a slow fall. - Forecast...The river is expected to gradually fall over the next several days. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood

These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.


Flood Warning issued April 21 at 11:41AM CDT by NWS Chicago IL

Effective: Tue April 21, 2026, 11:41 AM
Expires: Wed April 22, 2026, 5:45 AM

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Lake IL and Cook Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. For the Des Plaines River...including Des Plaines, Russell, Lincolnshire, Gurnee...Moderate flooding is forecast. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Des Plaines River from US-41 in Gurnee downstream to Townline Road in Vernon Hills, including the Gurnee gauge. * WHEN...Until further notice. * IMPACTS...At 10.0 feet, Residences threatened along Kilbourne Road and near O'Plaine Road and McClure Avenue in Gurnee. Businesses threatened along Old Grand Avenue near IL-132 in Gurnee. IL-132 (Grand Avenue) is threatened east of the river in Gurnee. * ADDITIONAL DETAILS... - At 10:30 AM CDT Tuesday the stage was 10.2 feet. - Recent Activity...The river stage continues to gradually fall. - Forecast...The river is expected to continue to gradually fall over the next several days and may fall below moderate flood stage tomorrow night. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood

These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.


Tuesday, April 21, 2026

Weather Forecast

Sunny
79.3°F
43.7°F
60.8°F
61%
0 in
0%
0%
17 mph
5.7


Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 6.27 μg/m3
Carbon Monoxide: 177.01 μg/m3
Nitrogen Dioxide: 6.19 μg/m3
Sulphur Dioxide: 2.7 μg/m3
Ozone: 93.12 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 12:51 AM
Sunset: 7:41 PM
Daylight: 13 hrs 39 mins
Moonrise: 8:50 AM
Moon Transit: 5:06 PM
Moonset: 12:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:36 PM - 7:06 PM

Minor Periods

8:20 AM - 9:50 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, April 22, 2026

Weather Forecast

Sunny
69.6°F
51.3°F
58.9°F
80%
0 in
0%
0%
7.8 mph
7


Air Quality

AQI: 2 - Moderate
PM2.5: 17.31 μg/m3
PM10: 17.92 μg/m3
Carbon Monoxide: 232.17 μg/m3
Nitrogen Dioxide: 15.37 μg/m3
Sulphur Dioxide: 2.53 μg/m3
Ozone: 62.64 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 12:51 AM
Sunset: 7:43 PM
Daylight: 13 hrs 41 mins
Moonrise: 10:00 AM
Moon Transit: 6:09 PM
Moonset: 1:20 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

5:23 AM - 7:53 AM
5:39 PM - 8:09 PM

Minor Periods

9:30 AM - 11:00 AM
12:50 AM - 2:20 AM

Action Rating: 3 out of 5

Thursday, April 23, 2026

Weather Forecast

Patchy rain nearby
75.5°F
53.2°F
64.2°F
78%
0.04 in
88%
0%
16.3 mph
6.9


Air Quality

AQI: 2 - Moderate
PM2.5: 16.68 μg/m3
PM10: 17.23 μg/m3
Carbon Monoxide: 215.61 μg/m3
Nitrogen Dioxide: 14.85 μg/m3
Sulphur Dioxide: 3.41 μg/m3
Ozone: 73.92 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 12:51 AM
Sunset: 7:44 PM
Daylight: 13 hrs 44 mins
Moonrise: 11:16 AM
Moon Transit: 7:06 PM
Moonset: 2:08 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
6:36 PM - 9:06 PM

Minor Periods

10:46 AM - 12:16 AM
1:38 AM - 3:08 AM

Action Rating: 3 out of 5

Friday, April 24, 2026

Weather Forecast

Heavy rain
65.1°F
51.3°F
61.1°F
88%
1.22 in
83%
0%
15.4 mph
4.6


Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 5.63 μg/m3
Carbon Monoxide: 163.85 μg/m3
Nitrogen Dioxide: 6.88 μg/m3
Sulphur Dioxide: 3.07 μg/m3
Ozone: 88.96 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 12:51 AM
Sunset: 7:45 PM
Daylight: 13 hrs 47 mins
Moonrise: 12:32 AM
Moon Transit: 8:00 PM
Moonset: 2:45 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

7:18 AM - 9:48 AM
7:30 PM - 10:00 PM

Minor Periods

12:02 AM - 1:32 PM
2:15 AM - 3:45 AM

Action Rating: 3 out of 5

Saturday, April 25, 2026

Weather Forecast

Sunny
61.1°F
44.1°F
52.2°F
63%
0 in
0%
0%
13.4 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 2.56 μg/m3
PM10: 2.61 μg/m3
Carbon Monoxide: 181.77 μg/m3
Nitrogen Dioxide: 5.75 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 63.38 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:50 AM
Sunset: 7:46 PM
Daylight: 13 hrs 49 mins
Moonrise: 1:44 PM
Moon Transit: 8:47 PM
Moonset: 3:13 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
8:17 PM - 10:47 PM

Minor Periods

1:14 PM - 2:44 PM
2:43 AM - 4:13 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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