Water Temperature of the Fox River in McHenry, IL
Current Water Temperature
Measurement Time: Thursday, August 7, 2025, 4:00 PM CDT
Temperature Locations
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Station Name: FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 728 feet / 222 meters
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

Humidity: 82%
Feels Like: 83.2°F
Wind: NNE 3.1 mph
Wind Gusts: 6.2 mph
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Thu
H: 89°F
L: 67°F

Fri
H: 95°F
L: 70°F

Sat
H: 95°F
L: 74°F

Sun
H: 77°F
L: 68°F

Mon
H: 83°F
L: 70°F
Air Quality
Nitrogen Dioxide: 32.19 μg/m3
Sulphur Dioxide: 13.14 μg/m3
Ozone: 79 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:05 PM
Daylight: 14 hrs 13 mins
Moon Transit: 12:00 AM
Moonset: 3:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:23 AM - 1:53 PM
Minor Periods
7:03 PM - 8:33 PM3:04 AM - 4:34 AM
Action Rating: 3 out of 5
Air Quality Alert issued August 6 at 2:35PM CDT by NWS Chicago IL
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed August 6, 2025, 2:35 PM
Expires: Fri August 8, 2025, 12:00 AM
The Illinois Environmental Protection Agency has determined that the Air Pollution Action Day designation will remain in effect for the greater Chicago Metropolitan Area through Thursday night August 7th. A Chicago area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. 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.
Air Quality Alert issued August 7 at 12:10AM CDT by NWS Chicago IL
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Thu August 7, 2025, 12:10 AM
Expires: Fri August 8, 2025, 12:00 AM
The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Thursday August 7th for the greater Chicago Metropolitan Area and is IN EFFECT UNTIL MIDNIGHT CDT TONIGHT. A Chicago area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. 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.
Air Quality Alert issued August 6 at 2:35PM CDT by NWS Chicago IL
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed August 6, 2025, 2:35 PM
Expires: Fri August 8, 2025, 12:00 AM
The Illinois Environmental Protection Agency has determined that the Air Pollution Action Day designation will remain in effect for the greater Chicago Metropolitan Area through Thursday night August 7th. A Chicago area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. 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.
Air Quality Alert issued August 7 at 12:10AM CDT by NWS Chicago IL
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Thu August 7, 2025, 12:10 AM
Expires: Fri August 8, 2025, 12:00 AM
The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Thursday August 7th for the greater Chicago Metropolitan Area and is IN EFFECT UNTIL MIDNIGHT CDT TONIGHT. A Chicago area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. 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.
Air Quality Alert issued August 7 at 12:20PM CDT by NWS Milwaukee/Sullivan WI
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Thu August 7, 2025, 12:20 PM
Expires: Thu August 7, 2025, 11:00 PM
The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Door, Kenosha, Kewaunee, Manitowoc, Milwaukee, Ozaukee, Racine, Sheboygan, Walworth, Washington, Waukesha. WHAT...The Ozone AQI is expected to reach the Unhealthy for Sensitive Groups (Orange) level. The NowCast Ozone AQI may reach the Unhealthy (Red) level at times. WHERE...Eastern Wisconsin. WHEN...Until 11 PM tonight. Precautionary/Preparedness Actions: Sensitive groups: Make outdoor activities shorter and less intense. Take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. For more information on current air quality, please see: https://airquality.wi.gov
Weather Forecast
Average Temperature: 77.1°F
Average Humidity: 80%
Wind: 12.3 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 26.22 μg/m3
Sulphur Dioxide: 6.87 μg/m3
Ozone: 108.64 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:05 PM
Daylight: 14 hrs 13 mins
Moon Transit: 12:00 AM
Moonset: 3:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:23 AM - 1:53 PM
Minor Periods
7:03 PM - 8:33 PM3:04 AM - 4:34 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 81.1°F
Average Humidity: 78%
Wind: 17.2 mph
UV Index: 1.9
Air Quality
Nitrogen Dioxide: 19.91 μg/m3
Sulphur Dioxide: 10.92 μg/m3
Ozone: 115.24 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:03 PM
Daylight: 14 hrs 10 mins
Moon Transit: 12:06 AM
Moonset: 4:46 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:16 AM - 2:46 PM
Minor Periods
7:35 PM - 9:05 PM4:16 AM - 5:46 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 83.2°F
Average Humidity: 74%
Wind: 17.4 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 11.34 μg/m3
Sulphur Dioxide: 9.29 μg/m3
Ozone: 135.32 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:02 PM
Daylight: 14 hrs 8 mins
Moon Transit: 12:57 AM
Moonset: 6:00 AM
Moon Phase: Full
Moon Illumination: 99.0%
Best Times for Fishing or Hunting
Major Periods
12:27 AM - 2:57 AM1:07 PM - 3:37 PM
Minor Periods
8:02 PM - 9:32 PM5:30 AM - 7:00 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 75.4°F
Average Humidity: 87%
Wind: 16.1 mph
UV Index: 1.4
Air Quality
Nitrogen Dioxide: 13.62 μg/m3
Sulphur Dioxide: 4.46 μg/m3
Ozone: 116.48 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:01 PM
Daylight: 14 hrs 5 mins
Moon Transit: 1:47 AM
Moonset: 7:14 AM
Moon Phase: Full
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
1:17 AM - 3:47 AM1:56 PM - 4:26 PM
Minor Periods
8:25 PM - 9:55 PM6:44 AM - 8:14 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 75.6°F
Average Humidity: 89%
Wind: 12.1 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 22.9 μg/m3
Sulphur Dioxide: 4.8 μg/m3
Ozone: 97.46 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:59 PM
Daylight: 14 hrs 3 mins
Moon Transit: 2:35 AM
Moonset: 8:28 AM
Moon Phase: Waning Gibbous
Moon Illumination: 89.6%
Best Times for Fishing or Hunting
Major Periods
2:05 AM - 4:35 AM12:00 AM - 12:00 AM
Minor Periods
8:47 PM - 10:17 PM7:58 AM - 9:28 AM
Action Rating: 2 out of 5