Water Temperature of the Rock River in Byron, IL

Current Water Temperature

75.9°F

Measurement Time: Wednesday, July 22, 2026, 10:15 PM CDT

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

53.1°F
Partly cloudy
Partly cloudy
53.8°F
52.9°F
93%
W 2.2 mph
4.7 mph
53.2°F
49.1°F
0 in
50%
9 mi
1023 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 82°F
L: 52°F
Sunny
Fri
H: 76°F
L: 58°F
Mist
Sat
H: 80°F
L: 59°F
Sunny
Sun
H: 90°F
L: 71°F
Sunny
Mon
H: 91°F
L: 68°F

Air Quality

AQI: 1 - Good
PM2.5: 7.5 μg/m3
PM10: 7.8 μg/m3
Carbon Monoxide: 233 μg/m3
Nitrogen Dioxide: 37.1 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 14 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:03 PM
Sunset: 8:25 PM
Daylight: 14 hrs 44 mins
Moonrise: 4:08 PM
Moon Transit: 8:37 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
8:07 PM - 10:37 PM

Minor Periods

3:38 PM - 5:08 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
82.4°F
52°F
65.8°F
65%
0 in
5%
0%
5.1 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 4.56 μg/m3
PM10: 4.78 μg/m3
Carbon Monoxide: 155.54 μg/m3
Nitrogen Dioxide: 15.91 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 63.04 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:03 PM
Sunset: 8:25 PM
Daylight: 14 hrs 44 mins
Moonrise: 4:08 PM
Moon Transit: 8:37 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
8:07 PM - 10:37 PM

Minor Periods

3:38 PM - 5:08 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
76.1°F
57.5°F
66.5°F
75%
0 in
10%
0%
8.9 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 5.24 μg/m3
PM10: 5.4 μg/m3
Carbon Monoxide: 147.75 μg/m3
Nitrogen Dioxide: 17.1 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 68.88 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:03 PM
Sunset: 8:24 PM
Daylight: 14 hrs 42 mins
Moonrise: 5:09 PM
Moon Transit: 9:27 PM
Moonset: 1:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:38 AM - 11:08 AM
8:57 PM - 11:27 PM

Minor Periods

4:39 PM - 6:09 PM
12:32 AM - 2:02 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Mist
79.6°F
58.8°F
69.1°F
91%
0.02 in
54%
0%
13.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 5.66 μg/m3
PM10: 6.2 μg/m3
Carbon Monoxide: 145.25 μg/m3
Nitrogen Dioxide: 8.25 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 76.46 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:03 PM
Sunset: 8:23 PM
Daylight: 14 hrs 40 mins
Moonrise: 6:06 PM
Moon Transit: 10:18 PM
Moonset: 1:42 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:28 AM - 11:58 AM
12:00 AM - 12:00 AM

Minor Periods

5:36 PM - 7:06 PM
1:12 AM - 2:42 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
89.5°F
71.2°F
80°F
81%
0.05 in
57%
0%
14.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.58 μg/m3
PM10: 6.07 μg/m3
Carbon Monoxide: 174.06 μg/m3
Nitrogen Dioxide: 9.26 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 83.08 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:03 PM
Sunset: 8:22 PM
Daylight: 14 hrs 38 mins
Moonrise: 6:55 PM
Moon Transit: 11:09 PM
Moonset: 2:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

10:20 AM - 12:50 AM
12:00 AM - 12:00 AM

Minor Periods

6:25 PM - 7:55 PM
2:01 AM - 3:31 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
91.2°F
67.7°F
80.8°F
74%
0.09 in
57%
0%
19 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 3.33 μg/m3
PM10: 3.53 μg/m3
Carbon Monoxide: 267.25 μg/m3
Nitrogen Dioxide: 9.58 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:03 PM
Sunset: 8:21 PM
Daylight: 14 hrs 36 mins
Moonrise: 7:36 PM
Moon Transit: 12:00 AM
Moonset: 3:27 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:11 AM - 1:41 PM

Minor Periods

7:06 PM - 8:36 PM
2:57 AM - 4:27 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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