Water Temperature of the Rock River in Byron, IL

Current Water Temperature

65.8°F

Measurement Time: Friday, May 22, 2026, 9:15 AM 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

71.1°F
Overcast
Overcast
71.1°F
76.1°F
39%
E 14.1 mph
16.2 mph
75.4°F
49.4°F
0 in
100%
9 mi
1017 mbar
3.9

Five Day Weather Forecast

Sunny
Fri
H: 77°F
L: 49°F
Patchy rain nearby
Sat
H: 73°F
L: 56°F
Patchy rain nearby
Sun
H: 76°F
L: 59°F
Sunny
Mon
H: 82°F
L: 57°F
Sunny
Tue
H: 85°F
L: 62°F

Air Quality

AQI: 2 - Moderate
PM2.5: 5.85 μg/m3
PM10: 5.95 μg/m3
Carbon Monoxide: 158.85 μg/m3
Nitrogen Dioxide: 9.25 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:53 AM
Sunset: 8:18 PM
Daylight: 14 hrs 49 mins
Moonrise: 11:38 AM
Moon Transit: 6:48 PM
Moonset: 1:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

6:00 AM - 8:30 AM
6:18 PM - 8:48 PM

Minor Periods

11:08 AM - 12:38 AM
12:49 AM - 2:19 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Sunny
76.6°F
49.1°F
61.8°F
56%
0 in
0%
0%
15.2 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 5.07 μg/m3
PM10: 5.23 μg/m3
Carbon Monoxide: 144.81 μg/m3
Nitrogen Dioxide: 8.27 μg/m3
Sulphur Dioxide: 2.51 μg/m3
Ozone: 68.16 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:53 AM
Sunset: 8:18 PM
Daylight: 14 hrs 49 mins
Moonrise: 11:38 AM
Moon Transit: 6:48 PM
Moonset: 1:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

6:00 AM - 8:30 AM
6:18 PM - 8:48 PM

Minor Periods

11:08 AM - 12:38 AM
12:49 AM - 2:19 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Patchy rain nearby
72.8°F
55.9°F
63.1°F
76%
0 in
69%
0%
8.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 159.09 μg/m3
Nitrogen Dioxide: 8.04 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 66.36 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 12:53 AM
Sunset: 8:19 PM
Daylight: 14 hrs 51 mins
Moonrise: 12:50 AM
Moon Transit: 7:34 PM
Moonset: 1:45 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

6:48 AM - 9:18 AM
7:04 PM - 9:34 PM

Minor Periods

12:20 AM - 1:50 PM
1:15 AM - 2:45 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
76.3°F
58.9°F
67.1°F
68%
0.13 in
81%
0%
9.4 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 8.51 μg/m3
PM10: 9.23 μg/m3
Carbon Monoxide: 168.85 μg/m3
Nitrogen Dioxide: 12.26 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 68.36 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 12:53 AM
Sunset: 8:20 PM
Daylight: 14 hrs 52 mins
Moonrise: 1:57 PM
Moon Transit: 8:18 PM
Moonset: 2:07 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

7:32 AM - 10:02 AM
7:48 PM - 10:18 PM

Minor Periods

1:27 PM - 2:57 PM
1:37 AM - 3:07 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Sunny
82.2°F
56.7°F
69.5°F
66%
0 in
0%
0%
13.6 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 8.89 μg/m3
PM10: 9.9 μg/m3
Carbon Monoxide: 171.65 μg/m3
Nitrogen Dioxide: 12.33 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 77.52 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:54 AM
Sunset: 8:21 PM
Daylight: 14 hrs 54 mins
Moonrise: 3:03 PM
Moon Transit: 9:00 PM
Moonset: 2:27 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

8:15 AM - 10:45 AM
8:30 PM - 11:00 PM

Minor Periods

2:33 PM - 4:03 PM
1:57 AM - 3:27 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
85.3°F
62.1°F
73.6°F
70%
0 in
0%
0%
7.6 mph
8.4


Air Quality

AQI: 2 - Moderate
PM2.5: 15.99 μg/m3
PM10: 16.63 μg/m3
Carbon Monoxide: 203.31 μg/m3
Nitrogen Dioxide: 15.24 μg/m3
Sulphur Dioxide: 4.5 μg/m3
Ozone: 76.77 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:54 AM
Sunset: 8:22 PM
Daylight: 14 hrs 55 mins
Moonrise: 4:07 PM
Moon Transit: 9:41 PM
Moonset: 2:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

8:57 AM - 11:27 AM
9:11 PM - 11:41 PM

Minor Periods

3:37 PM - 5:07 PM
2:17 AM - 3:47 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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