Water Temperature of the Rock River in Byron, IL

Current Water Temperature

68.2°F

Measurement Time: Sunday, May 17, 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

73°F
Overcast
Overcast
76.8°F
76.7°F
69%
S 16.3 mph
25.9 mph
72.8°F
61.8°F
0 in
100%
9 mi
1008 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 90°F
L: 66°F
Moderate rain
Tue
H: 67°F
L: 48°F
Sunny
Wed
H: 60°F
L: 42°F
Sunny
Thu
H: 67°F
L: 40°F
Moderate rain
Fri
H: 56°F
L: 47°F

Air Quality

AQI: 1 - Good
PM2.5: 4.05 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 144.85 μg/m3
Nitrogen Dioxide: 5.15 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 61 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 12:53 AM
Sunset: 8:14 PM
Daylight: 14 hrs 41 mins
Moonrise: 6:38 AM
Moon Transit: 2:54 PM
Moonset: 11:10 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:56 AM - 4:26 AM
2:24 PM - 4:54 PM

Minor Periods

12:00 AM - 12:00 AM
6:08 AM - 7:38 AM

Action Rating: 3 out of 5

Monday, May 18, 2026

Weather Forecast

Patchy rain nearby
89.8°F
65.7°F
76.1°F
72%
0.18 in
89%
0%
22.1 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 5.24 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 142.29 μg/m3
Nitrogen Dioxide: 4.34 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 76.68 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 12:53 AM
Sunset: 8:14 PM
Daylight: 14 hrs 41 mins
Moonrise: 6:38 AM
Moon Transit: 2:54 PM
Moonset: 11:10 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:56 AM - 4:26 AM
2:24 PM - 4:54 PM

Minor Periods

12:00 AM - 12:00 AM
6:08 AM - 7:38 AM

Action Rating: 3 out of 5

Tuesday, May 19, 2026

Weather Forecast

Moderate rain
67.3°F
48.2°F
62.4°F
86%
0.61 in
89%
0%
18.8 mph
4.1


Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 141.93 μg/m3
Nitrogen Dioxide: 3.75 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 64.8 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:53 AM
Sunset: 8:15 PM
Daylight: 14 hrs 43 mins
Moonrise: 7:47 AM
Moon Transit: 4:00 PM
Moonset: 12:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

3:03 AM - 5:33 AM
3:30 PM - 6:00 PM

Minor Periods

7:17 AM - 8:47 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, May 20, 2026

Weather Forecast

Sunny
60.4°F
42.3°F
50.9°F
68%
0 in
0%
0%
11 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 1.89 μg/m3
PM10: 1.96 μg/m3
Carbon Monoxide: 125.25 μg/m3
Nitrogen Dioxide: 2.94 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 67.76 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 12:53 AM
Sunset: 8:16 PM
Daylight: 14 hrs 45 mins
Moonrise: 9:04 AM
Moon Transit: 5:01 PM
Moonset: 12:05 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

4:07 AM - 6:37 AM
4:31 PM - 7:01 PM

Minor Periods

8:34 AM - 10:04 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Sunny
67°F
40.3°F
53.6°F
66%
0 in
0%
0%
11.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.54 μg/m3
PM10: 3.66 μg/m3
Carbon Monoxide: 131.64 μg/m3
Nitrogen Dioxide: 6.59 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 72.6 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:53 AM
Sunset: 8:17 PM
Daylight: 14 hrs 47 mins
Moonrise: 10:23 AM
Moon Transit: 5:58 PM
Moonset: 12:47 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

5:06 AM - 7:36 AM
5:28 PM - 7:58 PM

Minor Periods

9:53 AM - 11:23 AM
12:17 AM - 1:47 AM

Action Rating: 4 out of 5

Friday, May 22, 2026

Weather Forecast

Moderate rain
56.2°F
46.9°F
51.5°F
81%
0.38 in
82%
0%
17.9 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 8.12 μg/m3
PM10: 8.22 μg/m3
Carbon Monoxide: 170.87 μg/m3
Nitrogen Dioxide: 14.11 μg/m3
Sulphur Dioxide: 3.03 μg/m3
Ozone: 56.62 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

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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