Water Temperature of the Rock River in Byron, IL

Current Water Temperature

64.4°F

Measurement Time: Saturday, September 26, 2026, 3:15 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

54°F
Mostly Cloudy
Mostly Cloudy
84%
E 5 mph
50°F

Weather Forecast

Mostly Cloudy then Slight Chance Rain Showers
Tonight
48°F - Mostly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers then Mostly Sunny
Sunday
70°F - Slight Chance Rain Showers then Mostly Sunny
Partly Cloudy
Sunday Night
50°F - Partly Cloudy
Sunny
Monday
72°F - Sunny
Mostly Clear
Monday Night
51°F - Mostly Clear
Partly Sunny
Tuesday
74°F - Partly Sunny
Showers And Thunderstorms Likely
Tuesday Night
60°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday
71°F - Showers And Thunderstorms Likely
Chance Rain Showers
Wednesday Night
60°F - Chance Rain Showers
Rain Showers Likely
Thursday
71°F - Rain Showers Likely
Showers And Thunderstorms Likely
Thursday Night
55°F - Showers And Thunderstorms Likely
Chance Showers And Thunderstorms
Friday
67°F - Chance Showers And Thunderstorms
Slight Chance Rain Showers
Friday Night
52°F - Slight Chance Rain Showers
Slight Chance Rain Showers
Saturday
67°F - Slight Chance Rain Showers

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

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: 6:52 AM
Sun Transit: 12:47 AM
Sunset: 6:42 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:48 AM
Moonset: 10:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
2:52 PM - 5:22 PM

Minor Periods

7:29 PM - 8:59 PM
9:56 AM - 11:26 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: 6:52 AM
Sun Transit: 12:47 AM
Sunset: 6:42 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:48 AM
Moonset: 10:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
2:52 PM - 5:22 PM

Minor Periods

7:29 PM - 8:59 PM
9:56 AM - 11:26 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: 6:53 AM
Sun Transit: 12:46 AM
Sunset: 6:40 PM
Daylight: 11 hrs 47 mins
Moonrise: 8:41 PM
Moon Transit: 3:45 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
3:50 PM - 6:20 PM

Minor Periods

8:11 PM - 9:41 PM
11:13 AM - 12:43 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: 6:53 AM
Sun Transit: 12:46 AM
Sunset: 6:40 PM
Daylight: 11 hrs 47 mins
Moonrise: 8:41 PM
Moon Transit: 3:45 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
3:50 PM - 6:20 PM

Minor Periods

8:11 PM - 9:41 PM
11:13 AM - 12:43 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: 6:54 AM
Sun Transit: 12:46 AM
Sunset: 6:39 PM
Daylight: 11 hrs 44 mins
Moonrise: 9:34 PM
Moon Transit: 4:45 AM
Moonset: 12:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
4:52 PM - 7:22 PM

Minor Periods

9:04 PM - 10:34 PM
12:27 AM - 1:57 PM

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: 6:54 AM
Sun Transit: 12:46 AM
Sunset: 6:39 PM
Daylight: 11 hrs 44 mins
Moonrise: 9:34 PM
Moon Transit: 4:45 AM
Moonset: 12:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
4:52 PM - 7:22 PM

Minor Periods

9:04 PM - 10:34 PM
12:27 AM - 1:57 PM

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: 6:55 AM
Sun Transit: 12:46 AM
Sunset: 6:37 PM
Daylight: 11 hrs 42 mins
Moonrise: 10:39 PM
Moon Transit: 5:47 AM
Moonset: 2:02 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
5:55 PM - 8:25 PM

Minor Periods

10:09 PM - 11:39 PM
1:32 PM - 3:02 PM

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: 6:55 AM
Sun Transit: 12:46 AM
Sunset: 6:37 PM
Daylight: 11 hrs 42 mins
Moonrise: 10:39 PM
Moon Transit: 5:47 AM
Moonset: 2:02 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
5:55 PM - 8:25 PM

Minor Periods

10:09 PM - 11:39 PM
1:32 PM - 3:02 PM

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: 6:56 AM
Sun Transit: 12:45 AM
Sunset: 6:35 PM
Daylight: 11 hrs 39 mins
Moonrise: 11:51 PM
Moon Transit: 6:50 AM
Moonset: 2:56 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:20 AM - 8:50 AM
6:56 PM - 9:26 PM

Minor Periods

12:00 AM - 12:00 AM
2:26 PM - 3:56 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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