Water Temperature of the Rock River in Byron, IL

Current Water Temperature

32.5°F

Measurement Time: Saturday, December 13, 2025, 5:15 AM CST

Temperature Locations

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Local Points of Interest

River Park East; Hamas Park; Sunshine Park; Byron Forest Preserve District

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Rock River

Station Name: ROCK RIVER AT BYRON, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 679 feet / 207 meters

Nearest Address:
State Rte 72
Byron, IL 61010
Ogle County

GPS Coordinates: 42.12218889, -89.2553639

Nearby Water Temperatures

Mississippi River, Fulton, IL (48.7 mi)
Mississippi River, Fulton, IL (48.9 mi)
Beaver Slough, Clinton, IA (52.2 mi)
Fox River, McHenry, IL (53.2 mi)
Mississippi River, Camanche, IA (56.4 mi)
Illinois River, Utica, IL (56.9 mi)
Sugar River, Verona, WI (59.0 mi)
Mississippi River, Bellevue, IA (60.5 mi)
Badger Mill Creek, Verona, WI (60.8 mi)
Swan Creek, Fitchburg, WI (60.9 mi)
Illinois River, Marseilles, IL (61.7 mi)
Fox River, Burlington, WI (62.5 mi)
Lake Monona, Madison, WI (65.4 mi)
Eagle Spring Lake, Mukwonago, WI (65.6 mi)
Illinois River, Seneca, IL (65.7 mi)

Weather for Byron, Illinois

Current Weather

6.1°F
Overcast
Conditions: Overcast
Humidity: 57%
Feels Like: -9.1°F
Wind: NW 11 mph
Wind Gusts: 14.1 mph
Pressure: 30.28 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.9

Five Day Weather Forecast

Sunny
Sat
H: 11°F
L: -2°F
Sunny
Sun
H: 15°F
L: -1°F
Sunny
Mon
H: 29°F
L: 2°F
Partly Cloudy
Tue
H: 34°F
L: 11°F
Overcast
Wed
H: 40°F
L: 34°F

Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 180.85 μg/m3
Nitrogen Dioxide: 5.55 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 11:51 AM
Sunset: 4:26 PM
Daylight: 9 hrs 9 mins
Moonrise: 1:12 AM
Moon Transit: 7:02 AM
Moonset: 12:43 AM
Moon Phase: Last Quarter
Moon Illumination: 29.7%

Best Times for Fishing or Hunting

Major Periods

6:32 AM - 9:02 AM
6:58 PM - 9:28 PM

Minor Periods

12:13 AM - 1:43 PM
12:42 AM - 2:12 AM

Action Rating: 2 out of 5

Saturday, December 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 7.8°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 13.6 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.64 μg/m3
PM10: 4.83 μg/m3
Carbon Monoxide: 187.61 μg/m3
Nitrogen Dioxide: 5.52 μg/m3
Sulphur Dioxide: 1.36 μg/m3
Ozone: 65.72 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 11:51 AM
Sunset: 4:26 PM
Daylight: 9 hrs 9 mins
Moonrise: 1:12 AM
Moon Transit: 7:02 AM
Moonset: 12:43 AM
Moon Phase: Last Quarter
Moon Illumination: 29.7%

Best Times for Fishing or Hunting

Major Periods

6:32 AM - 9:02 AM
6:58 PM - 9:28 PM

Minor Periods

12:13 AM - 1:43 PM
12:42 AM - 2:12 AM

Action Rating: 2 out of 5

Sunday, December 14, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 5.5°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 4.7 μg/m3
PM10: 4.96 μg/m3
Carbon Monoxide: 178.21 μg/m3
Nitrogen Dioxide: 6.17 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 71.28 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 11:51 AM
Sunset: 4:26 PM
Daylight: 9 hrs 8 mins
Moonrise: 2:14 AM
Moon Transit: 7:43 AM
Moonset: 1:03 PM
Moon Phase: Last Quarter
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
7:40 PM - 10:10 PM

Minor Periods

12:33 AM - 2:03 PM
1:44 AM - 3:14 AM

Action Rating: 3 out of 5

Monday, December 15, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 13.2°F
Average Humidity: 82%
Chance of Rain: 0%
Wind: 16.3 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 8.22 μg/m3
PM10: 8.55 μg/m3
Carbon Monoxide: 194.65 μg/m3
Nitrogen Dioxide: 8.69 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 65.44 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 11:52 AM
Sunset: 4:26 PM
Daylight: 9 hrs 8 mins
Moonrise: 3:17 AM
Moon Transit: 8:25 AM
Moonset: 1:25 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

7:55 AM - 10:25 AM
8:22 PM - 10:52 PM

Minor Periods

12:55 AM - 2:25 PM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Tuesday, December 16, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 24.3°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 15.4 mph
UV Index: 0.3

Air Quality

AQI: 2 - Moderate
PM2.5: 15.95 μg/m3
PM10: 16.39 μg/m3
Carbon Monoxide: 220 μg/m3
Nitrogen Dioxide: 16.63 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 41.44 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 11:52 AM
Sunset: 4:27 PM
Daylight: 9 hrs 7 mins
Moonrise: 4:21 AM
Moon Transit: 9:09 AM
Moonset: 1:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
9:08 PM - 11:38 PM

Minor Periods

1:21 PM - 2:51 PM
3:51 AM - 5:21 AM

Action Rating: 2 out of 5

Wednesday, December 17, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 37.2°F
Average Humidity: 99%
Chance of Rain: 0%
Wind: 17.2 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 15.4 μg/m3
PM10: 15.64 μg/m3
Carbon Monoxide: 237.6 μg/m3
Nitrogen Dioxide: 10.53 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 45.62 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 11:53 AM
Sunset: 4:27 PM
Daylight: 9 hrs 7 mins
Moonrise: 5:24 AM
Moon Transit: 9:56 AM
Moonset: 2:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

1:53 PM - 3:23 PM
4:54 AM - 6:24 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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