Water Temperature of the Rock River in Byron, IL

Current Water Temperature

54.3°F

Measurement Time: Thursday, October 23, 2025, 9:15 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 / 207 meters

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 (59.0 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

52°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 44%
Feels Like: 47.5°F
Wind: NW 13.4 mph
Wind Gusts: 16 mph
Pressure: 30.14 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 1

Five Day Weather Forecast

Sunny
Thu
H: 57°F
L: 33°F
Sunny
Fri
H: 56°F
L: 28°F
Partly Cloudy
Sat
H: 58°F
L: 33°F
Overcast
Sun
H: 56°F
L: 47°F
Sunny
Mon
H: 61°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 5.65 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 168.85 μg/m3
Nitrogen Dioxide: 11.55 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 12:41 AM
Sunset: 6:03 PM
Daylight: 10 hrs 43 mins
Moonrise: 9:38 AM
Moon Transit: 2:14 PM
Moonset: 6:46 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

1:27 AM - 3:57 AM
1:44 PM - 4:14 PM

Minor Periods

6:16 PM - 7:46 PM
9:08 AM - 10:38 AM

Action Rating: 4 out of 5

Freeze Warning issued October 23 at 3:07AM CDT until October 24 at 8:00AM CDT by NWS Chicago IL

Effective: Thu October 23, 2025, 3:07 AM
Expires: Thu October 23, 2025, 1:15 PM

* WHAT...For the Frost Advisory, temperatures as low as 30 will result in frost formation. For the Freeze Warning, sub-freezing temperatures as low as 27 expected. * WHERE...Livingston, Ford, Iroquois, Boone, De Kalb, La Salle, Lee, Ogle, Winnebago, Grundy, and Kankakee Counties. * WHEN...For the Frost Advisory, until 9 AM CDT this morning. For the Freeze Warning, from 1 AM to 8 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. 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 October 23 at 3:07AM CDT until October 23 at 9:00AM CDT by NWS Chicago IL

Effective: Thu October 23, 2025, 3:07 AM
Expires: Thu October 23, 2025, 1:15 PM

* WHAT...For the Frost Advisory, temperatures as low as 30 will result in frost formation. For the Freeze Warning, sub-freezing temperatures as low as 27 expected. * WHERE...Livingston, Ford, Iroquois, Boone, De Kalb, La Salle, Lee, Ogle, Winnebago, Grundy, and Kankakee Counties. * WHEN...For the Frost Advisory, until 9 AM CDT this morning. For the Freeze Warning, from 1 AM to 8 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. 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.


Freeze Warning issued October 23 at 8:59AM CDT until October 24 at 8:00AM CDT by NWS Chicago IL

Effective: Thu October 23, 2025, 8:59 AM
Expires: Thu October 23, 2025, 7:00 PM

* WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Livingston, Ford, Iroquois, Boone, De Kalb, La Salle, Lee, Ogle, Winnebago, Grundy, and Kankakee Counties. * WHEN...From 1 AM to 8 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. 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.


Freeze Warning issued October 23 at 9:03AM CDT until October 24 at 9:00AM CDT by NWS Quad Cities IA IL

Effective: Thu October 23, 2025, 9:03 AM
Expires: Thu October 23, 2025, 5:15 PM

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of northwest Illinois and east central and northeast Iowa. * WHEN...From midnight tonight to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued October 23 at 9:36AM CDT until October 24 at 9:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu October 23, 2025, 9:36 AM
Expires: Thu October 23, 2025, 5:45 PM

* WHAT...Sub-freezing temperatures from 26 to 32 degrees expected. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From 2 AM to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued October 23 at 9:03AM CDT until October 24 at 9:00AM CDT by NWS Quad Cities IA IL

Effective: Thu October 23, 2025, 9:03 AM
Expires: Thu October 23, 2025, 5:15 PM

* WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Portions of north central, northwest, and west central Illinois and east central and southeast Iowa. * WHEN...From midnight tonight to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued October 23 at 3:07AM CDT until October 24 at 8:00AM CDT by NWS Chicago IL

Effective: Thu October 23, 2025, 3:07 AM
Expires: Thu October 23, 2025, 1:15 PM

* WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...In Illinois, DuPage, Eastern Will, Kane, Kendall, McHenry, Northern Will, and Southern Will Counties. In Indiana, Benton, Jasper, and Newton Counties. * WHEN...From 1 AM CDT /2 AM EDT/ to 8 AM CDT /9 AM EDT/ Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued October 23 at 8:59AM CDT until October 24 at 8:00AM CDT by NWS Chicago IL

Effective: Thu October 23, 2025, 8:59 AM
Expires: Thu October 23, 2025, 7:00 PM

* WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...In Illinois, DuPage, Eastern Will, Kane, Kendall, McHenry, Northern Will, and Southern Will Counties. In Indiana, Benton, Jasper, and Newton Counties. * WHEN...From 1 AM CDT /2 AM EDT/ to 8 AM CDT /9 AM EDT/ Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Thursday, October 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 43.3°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 13.6 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 3.87 μg/m3
PM10: 3.99 μg/m3
Carbon Monoxide: 150.37 μg/m3
Nitrogen Dioxide: 5.33 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 54.24 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 12:41 AM
Sunset: 6:03 PM
Daylight: 10 hrs 43 mins
Moonrise: 9:38 AM
Moon Transit: 2:14 PM
Moonset: 6:46 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

1:27 AM - 3:57 AM
1:44 PM - 4:14 PM

Minor Periods

6:16 PM - 7:46 PM
9:08 AM - 10:38 AM

Action Rating: 4 out of 5

Friday, October 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 40.8°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 7.61 μg/m3
PM10: 7.87 μg/m3
Carbon Monoxide: 164.81 μg/m3
Nitrogen Dioxide: 14.05 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 45.96 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:41 AM
Sunset: 6:01 PM
Daylight: 10 hrs 41 mins
Moonrise: 10:41 AM
Moon Transit: 3:03 PM
Moonset: 7:21 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

2:14 AM - 4:44 AM
2:33 PM - 5:03 PM

Minor Periods

6:51 PM - 8:21 PM
10:11 AM - 11:41 AM

Action Rating: 2 out of 5

Saturday, October 25, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 44.7°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 12.11 μg/m3
PM10: 12.33 μg/m3
Carbon Monoxide: 215.37 μg/m3
Nitrogen Dioxide: 17.39 μg/m3
Sulphur Dioxide: 4.52 μg/m3
Ozone: 45.64 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:41 AM
Sunset: 6:00 PM
Daylight: 10 hrs 38 mins
Moonrise: 11:41 AM
Moon Transit: 3:54 PM
Moonset: 8:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
3:24 PM - 5:54 PM

Minor Periods

7:35 PM - 9:05 PM
11:11 AM - 12:41 AM

Action Rating: 3 out of 5

Sunday, October 26, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 50.5°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 14.3 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 11.53 μg/m3
PM10: 11.66 μg/m3
Carbon Monoxide: 208.25 μg/m3
Nitrogen Dioxide: 16.25 μg/m3
Sulphur Dioxide: 9.41 μg/m3
Ozone: 44.52 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:40 AM
Sunset: 5:58 PM
Daylight: 10 hrs 35 mins
Moonrise: 12:36 AM
Moon Transit: 4:46 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 20.5%

Best Times for Fishing or Hunting

Major Periods

3:56 AM - 6:26 AM
4:16 PM - 6:46 PM

Minor Periods

8:28 PM - 9:58 PM
12:06 AM - 1:36 PM

Action Rating: 2 out of 5

Monday, October 27, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 51.6°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 16.8 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 12.95 μg/m3
PM10: 13.03 μg/m3
Carbon Monoxide: 236.31 μg/m3
Nitrogen Dioxide: 17.3 μg/m3
Sulphur Dioxide: 9.7 μg/m3
Ozone: 42 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 12:40 AM
Sunset: 5:57 PM
Daylight: 10 hrs 33 mins
Moonrise: 1:22 PM
Moon Transit: 5:38 PM
Moonset: 9:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
5:08 PM - 7:38 PM

Minor Periods

9:28 PM - 10:58 PM
12:52 AM - 2:22 PM

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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