Water Temperature of the Rock River in Byron, IL

Current Water Temperature

33.3°F

Measurement Time: Sunday, January 4, 2026, 1:15 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

30°F
Overcast
Overcast
19.6°F
31.5°F
75%
SSE 13.4 mph
21.5 mph
22.5°F
29.5°F
0 in
100%
9 mi
1015 mbar
0

Five Day Weather Forecast

Partly Cloudy
Sun
H: 33°F
L: 20°F
Mist
Mon
H: 34°F
L: 29°F
Overcast
Tue
H: 36°F
L: 30°F
Overcast
Wed
H: 33°F
L: 31°F
Partly Cloudy
Thu
H: 49°F
L: 37°F

Air Quality

AQI: 2 - Moderate
PM2.5: 9.15 μg/m3
PM10: 9.25 μg/m3
Carbon Monoxide: 211.85 μg/m3
Nitrogen Dioxide: 10.65 μg/m3
Sulphur Dioxide: 4.05 μg/m3
Ozone: 42 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

Sunday, January 4, 2026

Weather Forecast

Partly Cloudy
32.9°F
20.1°F
27.3°F
79%
0 in
0%
0%
13.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 13.43 μg/m3
PM10: 14.18 μg/m3
Carbon Monoxide: 199.93 μg/m3
Nitrogen Dioxide: 8.79 μg/m3
Sulphur Dioxide: 2.51 μg/m3
Ozone: 55.92 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

Monday, January 5, 2026

Weather Forecast

Mist
33.6°F
28.9°F
30.6°F
94%
0 in
0%
0%
13.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 11.21 μg/m3
PM10: 11.39 μg/m3
Carbon Monoxide: 224.73 μg/m3
Nitrogen Dioxide: 10.63 μg/m3
Sulphur Dioxide: 2.88 μg/m3
Ozone: 35.2 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:02 AM
Sunset: 4:40 PM
Daylight: 9 hrs 15 mins
Moonrise: 7:31 PM
Moon Transit: 1:53 AM
Moonset: 9:18 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:23 AM - 3:53 AM
1:56 PM - 4:26 PM

Minor Periods

7:01 PM - 8:31 PM
8:48 AM - 10:18 AM

Action Rating: 4 out of 5

Tuesday, January 6, 2026

Weather Forecast

Overcast
36.3°F
30.4°F
32.8°F
97%
0 in
0%
0%
9.6 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 19.78 μg/m3
PM10: 19.87 μg/m3
Carbon Monoxide: 285.73 μg/m3
Nitrogen Dioxide: 18.74 μg/m3
Sulphur Dioxide: 3.26 μg/m3
Ozone: 14.56 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:03 AM
Sunset: 4:41 PM
Daylight: 9 hrs 16 mins
Moonrise: 8:45 PM
Moon Transit: 2:45 AM
Moonset: 9:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:15 AM - 4:45 AM
2:45 PM - 5:15 PM

Minor Periods

8:15 PM - 9:45 PM
9:15 AM - 10:45 AM

Action Rating: 2 out of 5

Wednesday, January 7, 2026

Weather Forecast

Overcast
33.3°F
31.3°F
33.1°F
94%
0 in
0%
0%
10.7 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 22.24 μg/m3
PM10: 22.35 μg/m3
Carbon Monoxide: 326.63 μg/m3
Nitrogen Dioxide: 14.93 μg/m3
Sulphur Dioxide: 2.38 μg/m3
Ozone: 16.6 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:03 AM
Sunset: 4:42 PM
Daylight: 9 hrs 17 mins
Moonrise: 9:53 PM
Moon Transit: 3:32 AM
Moonset: 10:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:02 AM - 5:32 AM
3:31 PM - 6:01 PM

Minor Periods

9:23 PM - 10:53 PM
9:38 AM - 11:08 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Partly Cloudy
48.5°F
36.5°F
40.8°F
75%
0 in
0%
0%
7.4 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.14 μg/m3
PM10: 18.23 μg/m3
Carbon Monoxide: 286.47 μg/m3
Nitrogen Dioxide: 11.72 μg/m3
Sulphur Dioxide: 4.47 μg/m3
Ozone: 28.15 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:03 AM
Sunset: 4:43 PM
Daylight: 9 hrs 18 mins
Moonrise: 10:59 PM
Moon Transit: 4:16 AM
Moonset: 10:28 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

3:46 AM - 6:16 AM
4:13 PM - 6:43 PM

Minor Periods

10:29 PM - 11:59 PM
9:58 AM - 11:28 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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