Water Temperature of the Rock River in Byron, IL

Current Water Temperature

63.9°F

Measurement Time: Tuesday, September 22, 2026, 7:15 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

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

60°F
Chance Rain Showers
Chance Rain Showers
75%
ENE 10 mph
52°F

Weather Forecast

Chance Rain Showers
This Afternoon
60°F - Chance Rain Showers
Slight Chance Rain Showers then Mostly Cloudy
Tonight
53°F - Slight Chance Rain Showers then Mostly Cloudy
Partly Sunny
Wednesday
66°F - Partly Sunny
Partly Cloudy
Wednesday Night
48°F - Partly Cloudy
Partly Sunny
Thursday
67°F - Partly Sunny
Mostly Cloudy
Thursday Night
50°F - Mostly Cloudy
Partly Sunny
Friday
66°F - Partly Sunny
Mostly Cloudy
Friday Night
47°F - Mostly Cloudy
Partly Sunny
Saturday
64°F - Partly Sunny
Mostly Cloudy then Slight Chance Rain Showers
Saturday Night
49°F - Mostly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers then Mostly Cloudy
Sunday
67°F - Slight Chance Rain Showers then Mostly Cloudy
Mostly Cloudy
Sunday Night
52°F - Mostly Cloudy
Partly Sunny
Monday
72°F - Partly Sunny
Partly Cloudy then Slight Chance Rain Showers
Monday Night
54°F - Partly Cloudy then Slight Chance Rain Showers

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:49 AM
Sunset: 6:54 PM
Daylight: 12 hrs 9 mins
Moonrise: 5:08 PM
Moon Transit: 10:09 PM
Moonset: 2:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:22 AM - 11:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:38 PM - 6:08 PM
1:43 AM - 3:13 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: 6:45 AM
Sun Transit: 12:49 AM
Sunset: 6:54 PM
Daylight: 12 hrs 9 mins
Moonrise: 5:08 PM
Moon Transit: 10:09 PM
Moonset: 2:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:22 AM - 11:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:38 PM - 6:08 PM
1:43 AM - 3:13 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: 6:45 AM
Sun Transit: 12:49 AM
Sunset: 6:54 PM
Daylight: 12 hrs 9 mins
Moonrise: 5:08 PM
Moon Transit: 10:09 PM
Moonset: 2:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:22 AM - 11:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:38 PM - 6:08 PM
1:43 AM - 3:13 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: 6:46 AM
Sun Transit: 12:49 AM
Sunset: 6:52 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:32 PM
Moon Transit: 10:54 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:08 AM - 12:38 AM
12:00 AM - 12:00 AM

Minor Periods

5:02 PM - 6:32 PM
2:49 AM - 4:19 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: 6:46 AM
Sun Transit: 12:49 AM
Sunset: 6:52 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:32 PM
Moon Transit: 10:54 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:08 AM - 12:38 AM
12:00 AM - 12:00 AM

Minor Periods

5:02 PM - 6:32 PM
2:49 AM - 4:19 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: 6:47 AM
Sun Transit: 12:48 AM
Sunset: 6:51 PM
Daylight: 12 hrs 4 mins
Moonrise: 5:53 PM
Moon Transit: 11:38 PM
Moonset: 4:27 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

10:52 AM - 1:22 PM
12:00 AM - 12:00 AM

Minor Periods

5:23 PM - 6:53 PM
3:57 AM - 5:27 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: 6:47 AM
Sun Transit: 12:48 AM
Sunset: 6:51 PM
Daylight: 12 hrs 4 mins
Moonrise: 5:53 PM
Moon Transit: 11:38 PM
Moonset: 4:27 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

10:52 AM - 1:22 PM
12:00 AM - 12:00 AM

Minor Periods

5:23 PM - 6:53 PM
3:57 AM - 5:27 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: 6:48 AM
Sun Transit: 12:48 AM
Sunset: 6:49 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:14 PM
Moon Transit: 12:00 AM
Moonset: 5:34 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:44 PM - 7:14 PM
5:04 AM - 6:34 AM

Action Rating: 5 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: 6:48 AM
Sun Transit: 12:48 AM
Sunset: 6:49 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:14 PM
Moon Transit: 12:00 AM
Moonset: 5:34 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:44 PM - 7:14 PM
5:04 AM - 6:34 AM

Action Rating: 5 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: 6:49 AM
Sun Transit: 12:48 AM
Sunset: 6:47 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:36 PM
Moon Transit: 7:33 AM
Moonset: 6:44 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:06 PM - 7:36 PM
6:14 AM - 7:44 AM

Action Rating: 5 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: 6:49 AM
Sun Transit: 12:48 AM
Sunset: 6:47 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:36 PM
Moon Transit: 7:33 AM
Moonset: 6:44 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:06 PM - 7:36 PM
6:14 AM - 7:44 AM

Action Rating: 5 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: 6:50 AM
Sun Transit: 12:47 AM
Sunset: 6:46 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:59 PM
Moon Transit: 1:08 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
1:08 PM - 3:38 PM

Minor Periods

6:29 PM - 7:59 PM
7:25 AM - 8:55 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: 6:50 AM
Sun Transit: 12:47 AM
Sunset: 6:46 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:59 PM
Moon Transit: 1:08 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
1:08 PM - 3:38 PM

Minor Periods

6:29 PM - 7:59 PM
7:25 AM - 8:55 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: 6:51 AM
Sun Transit: 12:47 AM
Sunset: 6:44 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:26 PM
Moon Transit: 1:56 AM
Moonset: 9:09 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
1:58 PM - 4:28 PM

Minor Periods

6:56 PM - 8:26 PM
8:39 AM - 10:09 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: 6:51 AM
Sun Transit: 12:47 AM
Sunset: 6:44 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:26 PM
Moon Transit: 1:56 AM
Moonset: 9:09 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
1:58 PM - 4:28 PM

Minor Periods

6:56 PM - 8:26 PM
8:39 AM - 10:09 AM

Action Rating: 4 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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