Water Temperature of the Rock River in Byron, IL

Current Water Temperature

79.3°F

Measurement Time: Monday, July 20, 2026, 9:15 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

73.9°F
Overcast
Overcast
77.9°F
75.7°F
87%
W 14.3 mph
26.2 mph
70.7°F
67.2°F
0 in
100%
9 mi
1006 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 85°F
L: 60°F
Sunny
Wed
H: 70°F
L: 48°F
Sunny
Thu
H: 73°F
L: 51°F
Sunny
Fri
H: 74°F
L: 58°F
Mist
Sat
H: 76°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 2.7 μg/m3
PM10: 3.1 μg/m3
Carbon Monoxide: 121 μg/m3
Nitrogen Dioxide: 5.5 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:03 PM
Sunset: 8:27 PM
Daylight: 14 hrs 48 mins
Moonrise: 1:58 PM
Moon Transit: 7:03 PM
Moonset: 12:36 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
6:33 PM - 9:03 PM

Minor Periods

1:28 PM - 2:58 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Severe Thunderstorm Watch issued July 20 at 7:01PM CDT until July 20 at 11:00PM CDT by NWS Quad Cities IA IL

Effective: Mon July 20, 2026, 7:01 PM
Expires: Mon July 20, 2026, 11:00 PM

SEVERE THUNDERSTORM WATCH 504 REMAINS VALID UNTIL 11 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 8 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS HENRY IL MERCER IN WEST CENTRAL ILLINOIS HANCOCK HENDERSON MCDONOUGH WARREN IN MISSOURI THIS WATCH INCLUDES 2 COUNTIES IN NORTHEAST MISSOURI CLARK SCOTLAND THIS INCLUDES THE CITIES OF ALEDO, CARTHAGE, GENESEO, HENNEPIN, KAHOKA, MACOMB, MEMPHIS, MONMOUTH, OQUAWKA, AND PRINCETON.


Severe Thunderstorm Watch issued July 20 at 5:59PM CDT until July 20 at 11:00PM CDT by NWS Quad Cities IA IL

Effective: Mon July 20, 2026, 5:59 PM
Expires: Mon July 20, 2026, 11:00 PM

SEVERE THUNDERSTORM WATCH 504 REMAINS VALID UNTIL 11 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 10 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS HENRY IL MERCER ROCK ISLAND WHITESIDE IN WEST CENTRAL ILLINOIS HANCOCK HENDERSON MCDONOUGH WARREN IN IOWA THIS WATCH INCLUDES 2 COUNTIES IN EAST CENTRAL IOWA CLINTON SCOTT IN MISSOURI THIS WATCH INCLUDES 2 COUNTIES IN NORTHEAST MISSOURI CLARK SCOTLAND THIS INCLUDES THE CITIES OF ALEDO, BETTENDORF, CARTHAGE, CLINTON, CREDIT ISLAND, DAVENPORT, GENESEO, HENNEPIN, KAHOKA, MACOMB, MEMPHIS, MOLINE, MONMOUTH, OQUAWKA, PRINCETON, ROCK ISLAND, AND STERLING.


Severe Thunderstorm Watch issued July 20 at 5:39PM CDT until July 20 at 11:00PM CDT by NWS Quad Cities IA IL

Effective: Mon July 20, 2026, 5:39 PM
Expires: Mon July 20, 2026, 11:00 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 504 IN EFFECT UNTIL 11 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 10 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS HENRY IL MERCER ROCK ISLAND WHITESIDE IN WEST CENTRAL ILLINOIS HANCOCK HENDERSON MCDONOUGH WARREN IN IOWA THIS WATCH INCLUDES 2 COUNTIES IN EAST CENTRAL IOWA CLINTON SCOTT IN MISSOURI THIS WATCH INCLUDES 2 COUNTIES IN NORTHEAST MISSOURI CLARK SCOTLAND THIS INCLUDES THE CITIES OF ALEDO, BETTENDORF, CARTHAGE, CLINTON, CREDIT ISLAND, DAVENPORT, GENESEO, HENNEPIN, KAHOKA, MACOMB, MEMPHIS, MOLINE, MONMOUTH, OQUAWKA, PRINCETON, ROCK ISLAND, AND STERLING.
Tuesday, July 21, 2026

Weather Forecast

Sunny
85.1°F
59.9°F
72°F
80%
0.01 in
29%
0%
17.4 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 2.32 μg/m3
PM10: 2.45 μg/m3
Carbon Monoxide: 131.67 μg/m3
Nitrogen Dioxide: 3.27 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 74.33 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:03 PM
Sunset: 8:27 PM
Daylight: 14 hrs 48 mins
Moonrise: 1:58 PM
Moon Transit: 7:03 PM
Moonset: 12:36 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
6:33 PM - 9:03 PM

Minor Periods

1:28 PM - 2:58 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
69.6°F
47.7°F
59.8°F
72%
0 in
8%
0%
11.6 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 2.07 μg/m3
PM10: 2.13 μg/m3
Carbon Monoxide: 126.13 μg/m3
Nitrogen Dioxide: 4.13 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 66.04 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 1:03 PM
Sunset: 8:26 PM
Daylight: 14 hrs 46 mins
Moonrise: 3:04 PM
Moon Transit: 7:49 PM
Moonset: 12:00 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

7:02 AM - 9:32 AM
7:19 PM - 9:49 PM

Minor Periods

2:34 PM - 4:04 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
72.8°F
51.1°F
62.9°F
69%
0 in
7%
0%
5.8 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 3.28 μg/m3
PM10: 3.44 μg/m3
Carbon Monoxide: 127.58 μg/m3
Nitrogen Dioxide: 13.33 μg/m3
Sulphur Dioxide: 0.42 μg/m3
Ozone: 56.04 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:03 PM
Sunset: 8:25 PM
Daylight: 14 hrs 44 mins
Moonrise: 4:08 PM
Moon Transit: 8:37 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
8:07 PM - 10:37 PM

Minor Periods

3:38 PM - 5:08 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
74.1°F
58.4°F
65.9°F
75%
0 in
18%
0%
6.5 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 144.74 μg/m3
Nitrogen Dioxide: 15.74 μg/m3
Sulphur Dioxide: 0.65 μg/m3
Ozone: 66.63 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:03 PM
Sunset: 8:24 PM
Daylight: 14 hrs 42 mins
Moonrise: 5:09 PM
Moon Transit: 9:27 PM
Moonset: 1:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:38 AM - 11:08 AM
8:57 PM - 11:27 PM

Minor Periods

4:39 PM - 6:09 PM
12:32 AM - 2:02 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Mist
76.4°F
56.6°F
67.1°F
85%
0 in
21%
0%
9.6 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 5.8 μg/m3
PM10: 5.99 μg/m3
Carbon Monoxide: 218.75 μg/m3
Nitrogen Dioxide: 20.73 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 44.38 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:03 PM
Sunset: 8:23 PM
Daylight: 14 hrs 40 mins
Moonrise: 6:06 PM
Moon Transit: 10:18 PM
Moonset: 1:42 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:28 AM - 11:58 AM
12:00 AM - 12:00 AM

Minor Periods

5:36 PM - 7:06 PM
1:12 AM - 2:42 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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