Water Temperature of the Rock River in Byron, IL

Current Water Temperature

33.1°F

Measurement Time: Wednesday, December 31, 2025, 4:15 PM CST

Temperature Locations

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Local Points of Interest

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

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

19°F
Overcast
Overcast
6.6°F
20.8°F
62%
NNW 11.6 mph
15.9 mph
7°F
14.8°F
0 in
25%
9 mi
1016 mbar
0

Five Day Weather Forecast

Moderate or heavy snow showers
Wed
H: 37°F
L: 21°F
Overcast
Thu
H: 23°F
L: 12°F
Cloudy
Fri
H: 28°F
L: 20°F
Cloudy
Sat
H: 30°F
L: 21°F
Partly Cloudy
Sun
H: 24°F
L: 15°F

Air Quality

AQI: 2 - Moderate
PM2.5: 2.45 μg/m3
PM10: 2.65 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 3.15 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 69 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

Wednesday, December 31, 2025

Weather Forecast

Moderate or heavy snow showers
36.5°F
21.4°F
29.8°F
89%
0.1 in
88%
5%
16.1 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 8.13 μg/m3
PM10: 8.6 μg/m3
Carbon Monoxide: 180.49 μg/m3
Nitrogen Dioxide: 5.75 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 67.32 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

Thursday, January 1, 2026

Weather Forecast

Overcast
22.5°F
11.7°F
17.6°F
63%
0 in
0%
0%
10.7 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 2.97 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 168.13 μg/m3
Nitrogen Dioxide: 4.79 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 68.24 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:00 AM
Sunset: 4:36 PM
Daylight: 9 hrs 11 mins
Moonrise: 2:30 PM
Moon Transit: 10:45 PM
Moonset: 5:52 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

9:48 AM - 12:18 AM
12:00 AM - 12:00 AM

Minor Periods

2:00 PM - 3:30 PM
5:22 AM - 6:52 AM

Action Rating: 2 out of 5

Friday, January 2, 2026

Weather Forecast

Cloudy
28°F
19.6°F
23.5°F
76%
0 in
0%
0%
7.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 9.05 μg/m3
PM10: 9.46 μg/m3
Carbon Monoxide: 191.73 μg/m3
Nitrogen Dioxide: 13.47 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 48.2 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:01 AM
Sunset: 4:37 PM
Daylight: 9 hrs 12 mins
Moonrise: 3:37 PM
Moon Transit: 11:52 PM
Moonset: 7:03 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

10:55 AM - 1:25 PM
12:00 AM - 12:00 AM

Minor Periods

3:07 PM - 4:37 PM
6:33 AM - 8:03 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Cloudy
30°F
20.5°F
24.6°F
80%
0 in
0%
0%
6.7 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 10.27 μg/m3
PM10: 10.52 μg/m3
Carbon Monoxide: 190.58 μg/m3
Nitrogen Dioxide: 11.29 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 55.56 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:01 AM
Sunset: 4:38 PM
Daylight: 9 hrs 13 mins
Moonrise: 4:54 PM
Moon Transit: 12:00 AM
Moonset: 8:01 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 2:30 PM

Minor Periods

4:24 PM - 5:54 PM
7:31 AM - 9:01 AM

Action Rating: 5 out of 5

Sunday, January 4, 2026

Weather Forecast

Partly Cloudy
24.1°F
15°F
19.9°F
79%
0 in
0%
0%
7.4 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 16.91 μg/m3
PM10: 17.83 μg/m3
Carbon Monoxide: 354.56 μg/m3
Nitrogen Dioxide: 30.45 μg/m3
Sulphur Dioxide: 2.98 μg/m3
Ozone: 25.31 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:02 AM
Sunset: 4:39 PM
Daylight: 9 hrs 14 mins
Moonrise: 6:14 PM
Moon Transit: 12:55 AM
Moonset: 8:45 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:25 AM - 2:55 AM
1:01 PM - 3:31 PM

Minor Periods

5:44 PM - 7:14 PM
8:15 AM - 9:45 AM

Action Rating: 3 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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