Water Temperature of the Rock River in Byron, IL

Current Water Temperature

37.0°F

Measurement Time: Saturday, December 27, 2025, 11:15 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

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 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

42°F
Mostly cloudy
Conditions: Mostly cloudy
Humidity: 94%
Heat Index: 42°F
Feels Like: 35.6°F
Wind: ESE 6.2 mph
Wind Gusts: 14 mph
Wind Chill: 35.6°F
Air Pressure: 1010.13 millibars
Dew Point: 35.6°F
Chance of Precipitation: 0%
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 1 mi
UV Index: 0

Five Day Weather Forecast

Overcast
Sat
H: 44°F
L: 36°F
Heavy rain
Sun
H: 40°F
L: 35°F
Moderate or heavy snow showers
Mon
H: 23°F
L: 14°F
Partly Cloudy
Tue
H: 27°F
L: 12°F
Partly Cloudy
Wed
H: 23°F
L: 13°F

Air Quality

AQI: 1 - Good
PM2.5: 11.75 μg/m3
PM10: 11.85 μg/m3
Carbon Monoxide: 223.85 μg/m3
Nitrogen Dioxide: 12.85 μg/m3
Sulphur Dioxide: 9.65 μg/m3
Ozone: 29 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 11:58 AM
Sunset: 4:32 PM
Daylight: 9 hrs 8 mins
Moonrise: 11:33 AM
Moon Transit: 3:23 AM
Moonset: 12:27 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
2:53 AM - 5:23 AM

Minor Periods

11:03 AM - 12:33 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued December 27 at 3:54AM CST until December 27 at 12:00PM CST by NWS Quad Cities IA IL

Effective: Sat December 27, 2025, 3:54 AM
Expires: Sat December 27, 2025, 12:00 PM

* WHAT...Visibility one quarter mile or less at times in dense fog. * WHERE...Portions of north central, northwest, and west central Illinois, east central, northeast, and southeast Iowa, and northeast Missouri. * WHEN...Until noon CST today. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Saturday, December 27, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 38.8°F
Average Humidity: 97%
Chance of Rain: 0%
Wind: 12.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 11.27 μg/m3
PM10: 11.36 μg/m3
Carbon Monoxide: 268.01 μg/m3
Nitrogen Dioxide: 14.3 μg/m3
Sulphur Dioxide: 3.26 μg/m3
Ozone: 21.6 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 11:58 AM
Sunset: 4:32 PM
Daylight: 9 hrs 8 mins
Moonrise: 11:33 AM
Moon Transit: 3:23 AM
Moonset: 12:27 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
2:53 AM - 5:23 AM

Minor Periods

11:03 AM - 12:33 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 37.3°F
Average Humidity: 97%
Chance of Rain: 85%
Wind: 23 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 9.83 μg/m3
PM10: 9.89 μg/m3
Carbon Monoxide: 234.69 μg/m3
Nitrogen Dioxide: 11.24 μg/m3
Sulphur Dioxide: 4.69 μg/m3
Ozone: 31.12 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 11:58 AM
Sunset: 4:33 PM
Daylight: 9 hrs 8 mins
Moonrise: 11:56 AM
Moon Transit: 6:47 PM
Moonset: 12:39 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

5:59 AM - 8:29 AM
6:17 PM - 8:47 PM

Minor Periods

11:26 AM - 12:56 AM
12:09 AM - 1:39 AM

Action Rating: 2 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 20.3°F
Average Humidity: 71%
Chance of Rain: 65%
Wind: 24.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.51 μg/m3
PM10: 2.61 μg/m3
Carbon Monoxide: 182.13 μg/m3
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 62.08 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:00 AM
Sunset: 4:34 PM
Daylight: 9 hrs 9 mins
Moonrise: 12:22 AM
Moon Transit: 7:39 PM
Moonset: 1:53 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
7:09 PM - 9:39 PM

Minor Periods

11:52 AM - 1:22 PM
1:23 AM - 2:53 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 19°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 16.1 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.69 μg/m3
PM10: 2.96 μg/m3
Carbon Monoxide: 156.68 μg/m3
Nitrogen Dioxide: 4.29 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 70.36 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:00 AM
Sunset: 4:35 PM
Daylight: 9 hrs 10 mins
Moonrise: 12:54 AM
Moon Transit: 8:36 PM
Moonset: 3:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

7:43 AM - 10:13 AM
8:06 PM - 10:36 PM

Minor Periods

12:24 AM - 1:54 PM
2:42 AM - 4:12 AM

Action Rating: 3 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 21.2°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 16.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.5 μg/m3
PM10: 4.75 μg/m3
Carbon Monoxide: 174.4 μg/m3
Nitrogen Dioxide: 5.45 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 61.31 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:00 AM
Sunset: 4:35 PM
Daylight: 9 hrs 10 mins
Moonrise: 1:35 PM
Moon Transit: 9:39 PM
Moonset: 4:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

8:43 AM - 11:13 AM
9:09 PM - 11:39 PM

Minor Periods

1:05 PM - 2:35 PM
4:03 AM - 5:33 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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