Water Temperature of the Rock River in Byron, IL

Current Water Temperature

75.2°F

Measurement Time: Wednesday, September 9, 2026, 2:15 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

71°F
Rain Showers Likely
Rain Showers Likely
97%
WSW 10 mph
70°F

Weather Forecast

Rain Showers Likely then Mostly Cloudy
Today
80°F - Rain Showers Likely then Mostly Cloudy
Partly Cloudy
Tonight
59°F - Partly Cloudy
Mostly Sunny
Thursday
78°F - Mostly Sunny
Mostly Clear
Thursday Night
51°F - Mostly Clear
Sunny
Friday
81°F - Sunny
Mostly Clear then Chance Showers And Thunderstorms
Friday Night
59°F - Mostly Clear then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday
82°F - Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Saturday Night
58°F - Slight Chance Showers And Thunderstorms
Chance Rain Showers
Sunday
80°F - Chance Rain Showers
Chance Showers And Thunderstorms
Sunday Night
64°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday
86°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Monday Night
63°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Rain Showers Likely
Tuesday
78°F - Rain Showers Likely
Chance Rain Showers
Tuesday Night
56°F - Chance Rain Showers

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: 6:31 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

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

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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 8:16 AM
Moon Transit: 2:03 PM
Moonset: 7:41 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
1:33 PM - 4:03 PM

Minor Periods

7:11 PM - 8:41 PM
7:46 AM - 9:16 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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 8:16 AM
Moon Transit: 2:03 PM
Moonset: 7:41 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
1:33 PM - 4:03 PM

Minor Periods

7:11 PM - 8:41 PM
7:46 AM - 9:16 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: 6:35 AM
Sun Transit: 12:52 AM
Sunset: 7:10 PM
Daylight: 12 hrs 34 mins
Moonrise: 9:24 AM
Moon Transit: 2:48 PM
Moonset: 8:04 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:18 PM - 4:48 PM

Minor Periods

7:34 PM - 9:04 PM
8:54 AM - 10:24 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: 6:35 AM
Sun Transit: 12:52 AM
Sunset: 7:10 PM
Daylight: 12 hrs 34 mins
Moonrise: 9:24 AM
Moon Transit: 2:48 PM
Moonset: 8:04 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:18 PM - 4:48 PM

Minor Periods

7:34 PM - 9:04 PM
8:54 AM - 10:24 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: 6:36 AM
Sun Transit: 12:52 AM
Sunset: 7:08 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:33 AM
Moon Transit: 3:34 PM
Moonset: 8:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:04 PM - 5:34 PM

Minor Periods

7:59 PM - 9:29 PM
10:03 AM - 11:33 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: 6:36 AM
Sun Transit: 12:52 AM
Sunset: 7:08 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:33 AM
Moon Transit: 3:34 PM
Moonset: 8:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:04 PM - 5:34 PM

Minor Periods

7:59 PM - 9:29 PM
10:03 AM - 11:33 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: 6:37 AM
Sun Transit: 12:52 AM
Sunset: 7:06 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:40 AM
Moon Transit: 4:22 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
3:52 PM - 6:22 PM

Minor Periods

8:28 PM - 9:58 PM
11:10 AM - 12:40 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: 6:37 AM
Sun Transit: 12:52 AM
Sunset: 7:06 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:40 AM
Moon Transit: 4:22 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
3:52 PM - 6:22 PM

Minor Periods

8:28 PM - 9:58 PM
11:10 AM - 12:40 AM

Action Rating: 2 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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