Water Temperature of the Rock River in Byron, IL

Current Water Temperature

77.9°F

Measurement Time: Sunday, July 26, 2026, 8:15 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

85.8°F
Partly Cloudy
Partly Cloudy
97.7°F
97.2°F
77%
SSW 6 mph
7 mph
85.8°F
77.7°F
0 in
32%
6 mi
1011 mbar
8.5

Five Day Weather Forecast

Sunny
Sun
H: 95°F
L: 72°F
Sunny
Mon
H: 89°F
L: 69°F
Sunny
Tue
H: 83°F
L: 63°F
Sunny
Wed
H: 82°F
L: 59°F
Sunny
Thu
H: 83°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 6.5 μg/m3
PM10: 7.1 μg/m3
Carbon Monoxide: 143 μg/m3
Nitrogen Dioxide: 1.3 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 109 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

Heat Advisory issued July 26 at 3:18AM CDT until July 26 at 8:00PM CDT by NWS Chicago IL

Effective: Sun July 26, 2026, 3:18 AM
Expires: Sun July 26, 2026, 1:30 PM

* WHAT...Heat index values as high as 105 expected. * WHERE...Livingston, Boone, La Salle, Lee, Ogle, and Winnebago Counties. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Sunday, July 26, 2026

Weather Forecast

Sunny
95°F
72°F
81.2°F
81%
0 in
19%
0%
8.3 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 4.43 μg/m3
PM10: 4.75 μg/m3
Carbon Monoxide: 161.46 μg/m3
Nitrogen Dioxide: 7.96 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 69.29 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
89.4°F
68.8°F
79.4°F
81%
0.69 in
78%
0%
16.3 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 4.72 μg/m3
PM10: 5.66 μg/m3
Carbon Monoxide: 134.38 μg/m3
Nitrogen Dioxide: 6.63 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 78.75 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

Tuesday, July 28, 2026

Weather Forecast

Sunny
83°F
62.7°F
74.6°F
76%
0 in
9%
0%
13 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 2.93 μg/m3
PM10: 3.07 μg/m3
Carbon Monoxide: 132.75 μg/m3
Nitrogen Dioxide: 4.79 μg/m3
Sulphur Dioxide: 0.47 μg/m3
Ozone: 75.42 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:03 PM
Sunset: 8:20 PM
Daylight: 14 hrs 34 mins
Moonrise: 8:10 PM
Moon Transit: 12:00 AM
Moonset: 4:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:01 AM - 2:31 PM

Minor Periods

7:40 PM - 9:10 PM
3:59 AM - 5:29 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
82.1°F
58.7°F
70.1°F
63%
0 in
4%
0%
7.4 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 1.94 μg/m3
PM10: 2.04 μg/m3
Carbon Monoxide: 137.35 μg/m3
Nitrogen Dioxide: 5.75 μg/m3
Sulphur Dioxide: 0.43 μg/m3
Ozone: 61.71 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:03 PM
Sunset: 8:19 PM
Daylight: 14 hrs 32 mins
Moonrise: 8:39 PM
Moon Transit: 12:48 AM
Moonset: 5:34 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
12:48 AM - 3:18 PM

Minor Periods

8:09 PM - 9:39 PM
5:04 AM - 6:34 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
82.8°F
61.1°F
71.5°F
67%
0 in
5%
0%
7.8 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 2.05 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 179.75 μg/m3
Nitrogen Dioxide: 12.03 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 37.75 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:03 PM
Sunset: 8:18 PM
Daylight: 14 hrs 30 mins
Moonrise: 9:02 PM
Moon Transit: 1:35 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:05 AM - 3:35 AM
1:34 PM - 4:04 PM

Minor Periods

8:32 PM - 10:02 PM
6:11 AM - 7:41 AM

Action Rating: 5 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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