Water Temperature of the Rock River in Byron, IL

Current Water Temperature

57.4°F

Measurement Time: Thursday, May 7, 2026, 4:15 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

44.1°F
Clear
Clear
40°F
49.4°F
65%
N 6.9 mph
14.6 mph
48.3°F
22.2°F
0 in
0%
9 mi
1011 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 61°F
L: 31°F
Sunny
Fri
H: 64°F
L: 38°F
Partly Cloudy
Sat
H: 66°F
L: 47°F
Sunny
Sun
H: 59°F
L: 43°F
Sunny
Mon
H: 60°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 12.15 μg/m3
PM10: 13.85 μg/m3
Carbon Monoxide: 193.85 μg/m3
Nitrogen Dioxide: 15.45 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:53 AM
Sunset: 8:03 PM
Daylight: 14 hrs 18 mins
Moonrise: 1:00 AM
Moon Transit: 5:22 AM
Moonset: 9:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
5:23 PM - 7:53 PM

Minor Periods

9:20 AM - 10:50 AM
12:30 AM - 2:00 AM

Action Rating: 3 out of 5

Frost Advisory issued May 7 at 12:48PM CDT until May 8 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu May 7, 2026, 12:48 PM
Expires: Thu May 7, 2026, 11:15 PM

* WHAT...Temperatures dropping into the lower to middle 30s will result in frost formation. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From 1 AM to 8 AM CDT Friday. * 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 7 at 7:18PM CDT until May 8 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu May 7, 2026, 7:18 PM
Expires: Fri May 8, 2026, 3:30 AM

* WHAT...Temperatures dropping into the lower to middle 30s will result in frost formation. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From 1 AM to 8 AM CDT Friday. * 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.
Thursday, May 7, 2026

Weather Forecast

Sunny
61.3°F
31.1°F
48.2°F
48%
0 in
0%
0%
17.9 mph
5.1


Air Quality

AQI: 1 - Good
PM2.5: 6.22 μg/m3
PM10: 6.83 μg/m3
Carbon Monoxide: 151.89 μg/m3
Nitrogen Dioxide: 7.78 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 66.56 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:53 AM
Sunset: 8:03 PM
Daylight: 14 hrs 18 mins
Moonrise: 1:00 AM
Moon Transit: 5:22 AM
Moonset: 9:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
5:23 PM - 7:53 PM

Minor Periods

9:20 AM - 10:50 AM
12:30 AM - 2:00 AM

Action Rating: 3 out of 5

Friday, May 8, 2026

Weather Forecast

Sunny
64.4°F
37.8°F
52.4°F
54%
0 in
0%
0%
8.7 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 13.82 μg/m3
PM10: 15.76 μg/m3
Carbon Monoxide: 165.97 μg/m3
Nitrogen Dioxide: 8.89 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 72.28 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:53 AM
Sunset: 8:04 PM
Daylight: 14 hrs 20 mins
Moonrise: 1:34 AM
Moon Transit: 6:11 AM
Moonset: 10:55 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%

Best Times for Fishing or Hunting

Major Periods

5:41 AM - 8:11 AM
6:10 PM - 8:40 PM

Minor Periods

10:25 AM - 11:55 AM
1:04 AM - 2:34 AM

Action Rating: 3 out of 5

Saturday, May 9, 2026

Weather Forecast

Partly Cloudy
66.3°F
46.8°F
56.3°F
69%
0 in
0%
0%
11.6 mph
6.5


Air Quality

AQI: 2 - Moderate
PM2.5: 16.76 μg/m3
PM10: 18.75 μg/m3
Carbon Monoxide: 153.69 μg/m3
Nitrogen Dioxide: 10.97 μg/m3
Sulphur Dioxide: 1.92 μg/m3
Ozone: 73.44 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:53 AM
Sunset: 8:05 PM
Daylight: 14 hrs 23 mins
Moonrise: 2:03 AM
Moon Transit: 6:57 AM
Moonset: 12:01 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%

Best Times for Fishing or Hunting

Major Periods

6:27 AM - 8:57 AM
6:56 PM - 9:26 PM

Minor Periods

11:31 AM - 1:01 PM
1:33 AM - 3:03 AM

Action Rating: 2 out of 5

Sunday, May 10, 2026

Weather Forecast

Sunny
59.2°F
42.9°F
51.7°F
62%
0 in
0%
0%
15.9 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 6.97 μg/m3
PM10: 7.4 μg/m3
Carbon Monoxide: 150.67 μg/m3
Nitrogen Dioxide: 8.31 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 67 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
59.9°F
38°F
49.3°F
59%
0 in
0%
0%
11.9 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 2.97 μg/m3
PM10: 3.07 μg/m3
Carbon Monoxide: 157.93 μg/m3
Nitrogen Dioxide: 7.81 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 59.62 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

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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