Water Temperature of the Rock River in Byron, IL

Current Water Temperature

60.4°F

Measurement Time: Sunday, May 10, 2026, 7:15 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

62.1°F
Partly cloudy
Partly cloudy
62.1°F
65.7°F
23%
NW 12.8 mph
14.7 mph
65.7°F
22.7°F
0 in
50%
9 mi
1020 mbar
6.6

Five Day Weather Forecast

Sunny
Sun
H: 68°F
L: 39°F
Sunny
Mon
H: 63°F
L: 39°F
Patchy rain nearby
Tue
H: 71°F
L: 46°F
Sunny
Wed
H: 61°F
L: 46°F
Sunny
Thu
H: 68°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 3.25 μg/m3
PM10: 3.65 μg/m3
Carbon Monoxide: 146.85 μg/m3
Nitrogen Dioxide: 3.15 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 93 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:53 AM
Sunset: 8:06 PM
Daylight: 14 hrs 25 mins
Moonrise: 2:28 AM
Moon Transit: 7:42 AM
Moonset: 1:08 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:12 AM - 9:42 AM
7:41 PM - 10:11 PM

Minor Periods

12:38 AM - 2:08 PM
1:58 AM - 3:28 AM

Action Rating: 3 out of 5

Frost Advisory issued May 10 at 11:57AM CDT until May 11 at 8:00AM CDT by NWS Quad Cities IA IL

Effective: Sun May 10, 2026, 11:57 AM
Expires: Sun May 10, 2026, 10:00 PM

* WHAT...Temperatures in the mid to upper 30s may result in frost formation. * WHERE...In Illinois, Jo Daviess and Stephenson Counties. In Iowa, Buchanan, Delaware, and Dubuque Counties. * WHEN...From 2 AM to 8 AM CDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Frost Advisory issued May 10 at 11:59AM CDT until May 11 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun May 10, 2026, 11:59 AM
Expires: Sun May 10, 2026, 8:00 PM

* WHAT...Temperatures as low as 30 will result in frost formation. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From midnight tonight to 8 AM CDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Sunday, May 10, 2026

Weather Forecast

Sunny
68.4°F
38.7°F
55.4°F
37%
0 in
0%
0%
13.6 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.72 μg/m3
PM10: 5.07 μg/m3
Carbon Monoxide: 146.01 μg/m3
Nitrogen Dioxide: 5.31 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 75.04 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:53 AM
Sunset: 8:06 PM
Daylight: 14 hrs 25 mins
Moonrise: 2:28 AM
Moon Transit: 7:42 AM
Moonset: 1:08 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:12 AM - 9:42 AM
7:41 PM - 10:11 PM

Minor Periods

12:38 AM - 2:08 PM
1:58 AM - 3:28 AM

Action Rating: 3 out of 5

Monday, May 11, 2026

Weather Forecast

Sunny
62.9°F
39.1°F
51.5°F
55%
0 in
0%
0%
11.4 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 7.26 μg/m3
PM10: 7.56 μg/m3
Carbon Monoxide: 157.45 μg/m3
Nitrogen Dioxide: 10.65 μg/m3
Sulphur Dioxide: 2.89 μg/m3
Ozone: 70.2 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:53 AM
Sunset: 8:07 PM
Daylight: 14 hrs 27 mins
Moonrise: 2:50 AM
Moon Transit: 8:27 AM
Moonset: 2:17 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

7:57 AM - 10:27 AM
8:25 PM - 10:55 PM

Minor Periods

1:47 PM - 3:17 PM
2:20 AM - 3:50 AM

Action Rating: 3 out of 5

Tuesday, May 12, 2026

Weather Forecast

Patchy rain nearby
71.4°F
45.7°F
57.4°F
68%
0.06 in
84%
0%
23.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.31 μg/m3
PM10: 5.69 μg/m3
Carbon Monoxide: 159.77 μg/m3
Nitrogen Dioxide: 7.92 μg/m3
Sulphur Dioxide: 3.19 μg/m3
Ozone: 81.72 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:53 AM
Sunset: 8:08 PM
Daylight: 14 hrs 29 mins
Moonrise: 3:10 AM
Moon Transit: 8:41 PM
Moonset: 3:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

8:11 PM - 10:41 PM
8:11 PM - 10:41 PM

Minor Periods

2:56 PM - 4:26 PM
2:40 AM - 4:10 AM

Action Rating: 4 out of 5

Wednesday, May 13, 2026

Weather Forecast

Sunny
61.4°F
46.1°F
54.2°F
68%
0 in
0%
0%
20.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 2.31 μg/m3
PM10: 2.39 μg/m3
Carbon Monoxide: 147.18 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 82.2 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:53 AM
Sunset: 8:09 PM
Daylight: 14 hrs 31 mins
Moonrise: 3:32 AM
Moon Transit: 12:00 AM
Moonset: 4:40 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

4:10 PM - 5:40 PM
3:02 AM - 4:32 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
67.5°F
41.2°F
54.5°F
63%
0 in
0%
0%
12.8 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 6.04 μg/m3
PM10: 6.32 μg/m3
Carbon Monoxide: 178.11 μg/m3
Nitrogen Dioxide: 14.9 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 59.69 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:53 AM
Sunset: 8:10 PM
Daylight: 14 hrs 33 mins
Moonrise: 3:56 AM
Moon Transit: 10:48 AM
Moonset: 5:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:18 AM - 12:48 AM

Minor Periods

5:27 PM - 6:57 PM
3:26 AM - 4:56 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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