Water Temperature of the Rock River in Byron, IL

Current Water Temperature

72.0°F

Measurement Time: Sunday, June 28, 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

75.9°F
Partly cloudy
Partly cloudy
80.6°F
79.6°F
91%
S 11.4 mph
20.8 mph
75.2°F
72.7°F
0 in
50%
8 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 98°F
L: 75°F
Sunny
Tue
H: 89°F
L: 72°F
Sunny
Wed
H: 90°F
L: 73°F
Sunny
Thu
H: 90°F
L: 73°F
Sunny
Fri
H: 90°F
L: 69°F

Air Quality

PM2.5: 4.7 μg/m3
PM10: 5.3 μg/m3
Carbon Monoxide: 131 μg/m3
Nitrogen Dioxide: 7.7 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 48 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:00 PM
Sunset: 8:37 PM
Daylight: 15 hrs 14 mins
Moonrise: 8:57 PM
Moon Transit: 12:23 AM
Moonset: 4:37 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:25 AM - 2:55 PM

Minor Periods

8:27 PM - 9:57 PM
4:07 AM - 5:37 AM

Action Rating: 5 out of 5

Heat Advisory issued June 28 at 6:29PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Effective: Sun June 28, 2026, 6:29 PM
Expires: Mon June 29, 2026, 4:30 AM

* WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/ Wednesday. * 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Heat Advisory issued June 28 at 4:41PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Effective: Sun June 28, 2026, 4:41 PM
Expires: Mon June 29, 2026, 2:45 AM

* WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/ Wednesday. * 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.


Heat Advisory issued June 28 at 9:11PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Effective: Sun June 28, 2026, 9:11 PM
Expires: Mon June 29, 2026, 7:15 AM

* WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/ Wednesday. * 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Heat Advisory issued June 29 at 2:02AM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Effective: Mon June 29, 2026, 2:02 AM
Expires: Mon June 29, 2026, 12:15 PM

* WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From noon CDT /1 PM EDT/ today to 10 PM CDT /11 PM EDT/ Wednesday. * 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Monday, June 29, 2026

Weather Forecast

Sunny
98.2°F
74.7°F
83.8°F
79%
0 in
9%
0%
16.6 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 5.49 μg/m3
PM10: 6.4 μg/m3
Carbon Monoxide: 124 μg/m3
Nitrogen Dioxide: 3.75 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 73.83 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:00 PM
Sunset: 8:37 PM
Daylight: 15 hrs 14 mins
Moonrise: 8:57 PM
Moon Transit: 12:23 AM
Moonset: 4:37 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:25 AM - 2:55 PM

Minor Periods

8:27 PM - 9:57 PM
4:07 AM - 5:37 AM

Action Rating: 5 out of 5

Tuesday, June 30, 2026

Weather Forecast

Sunny
89.1°F
72.4°F
80.9°F
81%
0 in
9%
0%
17 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 11.72 μg/m3
PM10: 18.03 μg/m3
Carbon Monoxide: 121.33 μg/m3
Nitrogen Dioxide: 2.93 μg/m3
Sulphur Dioxide: 1.16 μg/m3
Ozone: 73.92 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:00 PM
Sunset: 8:37 PM
Daylight: 15 hrs 13 mins
Moonrise: 9:36 PM
Moon Transit: 1:14 AM
Moonset: 5:35 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
1:15 PM - 3:45 PM

Minor Periods

9:06 PM - 10:36 PM
5:05 AM - 6:35 AM

Action Rating: 5 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
89.7°F
73.3°F
81.2°F
82%
0 in
9%
0%
14.5 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 10.83 μg/m3
PM10: 16.54 μg/m3
Carbon Monoxide: 135.64 μg/m3
Nitrogen Dioxide: 3.23 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 77.42 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 13 mins
Moonrise: 10:08 PM
Moon Transit: 2:04 AM
Moonset: 6:39 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:34 AM - 4:04 AM
2:04 PM - 4:34 PM

Minor Periods

9:38 PM - 11:08 PM
6:09 AM - 7:39 AM

Action Rating: 3 out of 5

Thursday, July 2, 2026

Weather Forecast

Sunny
90.1°F
73.1°F
81.6°F
79%
0.01 in
23%
0%
12.3 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 4.99 μg/m3
PM10: 5.94 μg/m3
Carbon Monoxide: 206.4 μg/m3
Nitrogen Dioxide: 3.83 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 80.25 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 12 mins
Moonrise: 10:35 PM
Moon Transit: 2:52 AM
Moonset: 7:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:22 AM - 4:52 AM
2:51 PM - 5:21 PM

Minor Periods

10:05 PM - 11:35 PM
7:13 AM - 8:43 AM

Action Rating: 2 out of 5

Friday, July 3, 2026

Weather Forecast

Sunny
89.8°F
69°F
79.8°F
80%
0 in
9%
0%
11.2 mph
8


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 11 mins
Moonrise: 10:57 PM
Moon Transit: 3:37 AM
Moonset: 8:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
3:35 PM - 6:05 PM

Minor Periods

10:27 PM - 11:57 PM
8:19 AM - 9:49 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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