Water Temperature of the Rock River in Byron, IL

Current Water Temperature

80.6°F

Measurement Time: Friday, September 4, 2026, 11:15 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

71°F
Patchy Fog
Patchy Fog
100%
0 mph
71°F

Weather Forecast

Patchy Fog
Overnight
70°F - Patchy Fog
Patchy Fog then Mostly Sunny
Saturday
88°F - Patchy Fog then Mostly Sunny
Partly Cloudy
Saturday Night
60°F - Partly Cloudy
Mostly Sunny
Sunday
82°F - Mostly Sunny
Partly Cloudy
Sunday Night
57°F - Partly Cloudy
Mostly Sunny
Labor Day
82°F - Mostly Sunny
Partly Cloudy
Monday Night
60°F - Partly Cloudy
Mostly Sunny
Tuesday
88°F - Mostly Sunny
Partly Cloudy then Chance Showers And Thunderstorms
Tuesday Night
71°F - Partly Cloudy then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Wednesday
87°F - Chance Showers And Thunderstorms
Partly Cloudy then Slight Chance Rain Showers
Wednesday Night
58°F - Partly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers then Mostly Sunny
Thursday
81°F - Slight Chance Rain Showers then Mostly Sunny
Partly Cloudy
Thursday Night
57°F - Partly Cloudy
Mostly Sunny
Friday
84°F - Mostly Sunny

Astronomical

Sunrise: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins
Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins
Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins
Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins
Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:29 AM
Sun Transit: 12:54 AM
Sunset: 7:20 PM
Daylight: 12 hrs 51 mins
Moonrise: 2:02 AM
Moon Transit: 9:56 AM
Moonset: 5:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

5:07 PM - 6:37 PM
1:32 AM - 3:02 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:29 AM
Sun Transit: 12:54 AM
Sunset: 7:20 PM
Daylight: 12 hrs 51 mins
Moonrise: 2:02 AM
Moon Transit: 9:56 AM
Moonset: 5:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

5:07 PM - 6:37 PM
1:32 AM - 3:02 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:18 PM
Daylight: 12 hrs 48 mins
Moonrise: 3:21 AM
Moon Transit: 10:52 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

5:39 PM - 7:09 PM
2:51 AM - 4:21 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:18 PM
Daylight: 12 hrs 48 mins
Moonrise: 3:21 AM
Moon Transit: 10:52 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

5:39 PM - 7:09 PM
2:51 AM - 4:21 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:31 AM
Sun Transit: 12:54 AM
Sunset: 7:17 PM
Daylight: 12 hrs 45 mins
Moonrise: 4:39 AM
Moon Transit: 11:44 AM
Moonset: 6:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:14 AM - 1:44 PM

Minor Periods

6:06 PM - 7:36 PM
4:09 AM - 5:39 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:31 AM
Sun Transit: 12:54 AM
Sunset: 7:17 PM
Daylight: 12 hrs 45 mins
Moonrise: 4:39 AM
Moon Transit: 11:44 AM
Moonset: 6:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:14 AM - 1:44 PM

Minor Periods

6:06 PM - 7:36 PM
4:09 AM - 5:39 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:32 AM
Sun Transit: 12:53 AM
Sunset: 7:15 PM
Daylight: 12 hrs 43 mins
Moonrise: 5:53 AM
Moon Transit: 12:32 AM
Moonset: 6:58 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:02 AM - 2:32 PM

Minor Periods

6:28 PM - 7:58 PM
5:23 AM - 6:53 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:32 AM
Sun Transit: 12:53 AM
Sunset: 7:15 PM
Daylight: 12 hrs 43 mins
Moonrise: 5:53 AM
Moon Transit: 12:32 AM
Moonset: 6:58 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:02 AM - 2:32 PM

Minor Periods

6:28 PM - 7:58 PM
5:23 AM - 6:53 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 40 mins
Moonrise: 7:05 AM
Moon Transit: 1:18 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:48 AM - 3:18 PM

Minor Periods

6:49 PM - 8:19 PM
6:35 AM - 8:05 AM

Action Rating: 5 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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