Water Temperature of the Rock River in Byron, IL

Current Water Temperature

67.5°F

Measurement Time: Friday, September 18, 2026, 10:15 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

65°F
Showers And Thunderstorms
Showers And Thunderstorms
93%
E 10 mph
62°F

Weather Forecast

Showers And Thunderstorms
Overnight
63°F - Showers And Thunderstorms
Showers And Thunderstorms then Showers And Thunderstorms Likely
Saturday
78°F - Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms
Saturday Night
60°F - Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Sunday
69°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Rain Showers
Sunday Night
53°F - Chance Rain Showers
Chance Rain Showers
Monday
64°F - Chance Rain Showers
Slight Chance Rain Showers
Monday Night
47°F - Slight Chance Rain Showers
Slight Chance Rain Showers then Partly Sunny
Tuesday
63°F - Slight Chance Rain Showers then Partly Sunny
Partly Cloudy
Tuesday Night
46°F - Partly Cloudy
Mostly Sunny
Wednesday
66°F - Mostly Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy
Mostly Sunny
Thursday
68°F - Mostly Sunny
Partly Cloudy
Thursday Night
48°F - Partly Cloudy
Mostly Sunny
Friday
71°F - Mostly Sunny

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:50 AM
Sunset: 6:59 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:29 PM
Moon Transit: 7:45 PM
Moonset: 12:07 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
7:15 PM - 9:45 PM

Minor Periods

2:59 PM - 4:29 PM
12:00 AM - 12:00 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: 6:42 AM
Sun Transit: 12:50 AM
Sunset: 6:59 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:29 PM
Moon Transit: 7:45 PM
Moonset: 12:07 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
7:15 PM - 9:45 PM

Minor Periods

2:59 PM - 4:29 PM
12:00 AM - 12:00 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: 6:42 AM
Sun Transit: 12:50 AM
Sunset: 6:59 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:29 PM
Moon Transit: 7:45 PM
Moonset: 12:07 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
7:15 PM - 9:45 PM

Minor Periods

2:59 PM - 4:29 PM
12:00 AM - 12:00 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: 6:42 AM
Sun Transit: 12:50 AM
Sunset: 6:59 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:29 PM
Moon Transit: 7:45 PM
Moonset: 12:07 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
7:15 PM - 9:45 PM

Minor Periods

2:59 PM - 4:29 PM
12:00 AM - 12:00 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: 6:43 AM
Sun Transit: 12:50 AM
Sunset: 6:58 PM
Daylight: 12 hrs 15 mins
Moonrise: 4:08 PM
Moon Transit: 8:35 PM
Moonset: 12:05 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:46 AM - 10:16 AM
8:05 PM - 10:35 PM

Minor Periods

3:38 PM - 5:08 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: 6:43 AM
Sun Transit: 12:50 AM
Sunset: 6:58 PM
Daylight: 12 hrs 15 mins
Moonrise: 4:08 PM
Moon Transit: 8:35 PM
Moonset: 12:05 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:46 AM - 10:16 AM
8:05 PM - 10:35 PM

Minor Periods

3:38 PM - 5:08 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: 6:44 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

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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