Water Temperature of the Rock River in Byron, IL

Current Water Temperature

64.9°F

Measurement Time: Monday, September 21, 2026, 4:15 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

59°F
Slight Chance Rain Showers
Slight Chance Rain Showers
86%
ENE 15 mph
55°F

Weather Forecast

Slight Chance Rain Showers
Today
61°F - Slight Chance Rain Showers
Slight Chance Rain Showers
Tonight
50°F - Slight Chance Rain Showers
Slight Chance Rain Showers then Partly Sunny
Tuesday
63°F - Slight Chance Rain Showers then Partly Sunny
Mostly Clear
Tuesday Night
46°F - Mostly Clear
Mostly Sunny
Wednesday
67°F - Mostly Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy
Mostly Sunny
Thursday
67°F - Mostly Sunny
Partly Cloudy
Thursday Night
48°F - Partly Cloudy
Partly Sunny
Friday
68°F - Partly Sunny
Mostly Cloudy
Friday Night
47°F - Mostly Cloudy
Partly Sunny
Saturday
68°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 Partly Sunny
Sunday
71°F - Slight Chance Rain Showers then Partly Sunny
Partly Cloudy then Slight Chance Rain Showers
Sunday Night
52°F - Partly Cloudy then Slight Chance Rain Showers

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:50 AM
Sunset: 6:56 PM
Daylight: 12 hrs 12 mins
Moonrise: 4:41 PM
Moon Transit: 9:23 PM
Moonset: 1:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:35 AM - 11:05 AM
8:53 PM - 11:23 PM

Minor Periods

4:11 PM - 5:41 PM
12:37 AM - 2:07 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: 6:44 AM
Sun Transit: 12:50 AM
Sunset: 6:56 PM
Daylight: 12 hrs 12 mins
Moonrise: 4:41 PM
Moon Transit: 9:23 PM
Moonset: 1:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:35 AM - 11:05 AM
8:53 PM - 11:23 PM

Minor Periods

4:11 PM - 5:41 PM
12:37 AM - 2:07 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: 6:44 AM
Sun Transit: 12:50 AM
Sunset: 6:56 PM
Daylight: 12 hrs 12 mins
Moonrise: 4:41 PM
Moon Transit: 9:23 PM
Moonset: 1:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:35 AM - 11:05 AM
8:53 PM - 11:23 PM

Minor Periods

4:11 PM - 5:41 PM
12:37 AM - 2:07 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

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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