Water Temperature of the Rock River in Byron, IL
Current Water Temperature
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 DistrictStation 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

Humidity: 44%
Feels Like: 47.5°F
Wind: NW 13.4 mph
Wind Gusts: 16 mph
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 1
Five Day Weather Forecast

Thu
H: 57°F
L: 33°F

Fri
H: 56°F
L: 28°F

Sat
H: 58°F
L: 33°F

Sun
H: 56°F
L: 47°F

Mon
H: 61°F
L: 44°F
Air Quality
Nitrogen Dioxide: 11.55 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 46 μg/m3
Astronomical
Sun Transit: 12:41 AM
Sunset: 6:03 PM
Daylight: 10 hrs 43 mins
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 AM1:44 PM - 4:14 PM
Minor Periods
6:16 PM - 7:46 PM9:08 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.
Weather Forecast
Average Temperature: 43.3°F
Average Humidity: 65%
Wind: 13.6 mph
UV Index: 0.6
Air Quality
Nitrogen Dioxide: 5.33 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 54.24 μg/m3
Astronomical
Sun Transit: 12:41 AM
Sunset: 6:03 PM
Daylight: 10 hrs 43 mins
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 AM1:44 PM - 4:14 PM
Minor Periods
6:16 PM - 7:46 PM9:08 AM - 10:38 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 40.8°F
Average Humidity: 67%
Wind: 7.4 mph
UV Index: 0.7
Air Quality
Nitrogen Dioxide: 14.05 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 45.96 μg/m3
Astronomical
Sun Transit: 12:41 AM
Sunset: 6:01 PM
Daylight: 10 hrs 41 mins
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 AM2:33 PM - 5:03 PM
Minor Periods
6:51 PM - 8:21 PM10:11 AM - 11:41 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 44.7°F
Average Humidity: 70%
Wind: 10.7 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 17.39 μg/m3
Sulphur Dioxide: 4.52 μg/m3
Ozone: 45.64 μg/m3
Astronomical
Sun Transit: 12:41 AM
Sunset: 6:00 PM
Daylight: 10 hrs 38 mins
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 AM3:24 PM - 5:54 PM
Minor Periods
7:35 PM - 9:05 PM11:11 AM - 12:41 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 50.5°F
Average Humidity: 74%
Wind: 14.3 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 16.25 μg/m3
Sulphur Dioxide: 9.41 μg/m3
Ozone: 44.52 μg/m3
Astronomical
Sun Transit: 12:40 AM
Sunset: 5:58 PM
Daylight: 10 hrs 35 mins
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 AM4:16 PM - 6:46 PM
Minor Periods
8:28 PM - 9:58 PM12:06 AM - 1:36 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 51.6°F
Average Humidity: 63%
Wind: 16.8 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 17.3 μg/m3
Sulphur Dioxide: 9.7 μg/m3
Ozone: 42 μg/m3
Astronomical
Sun Transit: 12:40 AM
Sunset: 5:57 PM
Daylight: 10 hrs 33 mins
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 AM5:08 PM - 7:38 PM
Minor Periods
9:28 PM - 10:58 PM12:52 AM - 2:22 PM
Action Rating: 3 out of 5