Water Temperature of the Rock River in Byron, IL

Current Water Temperature

69.6°F

Measurement Time: Monday, September 14, 2026, 6:15 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

70°F
Partly Sunny
Partly Sunny
51%
SSE 10 mph
51°F

Weather Forecast

Slight Chance Rain Showers
This Afternoon
73°F - Slight Chance Rain Showers
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Tonight
65°F - Slight Chance Rain Showers then Chance Showers And Thunderstorms
Showers And Thunderstorms Likely
Tuesday
79°F - Showers And Thunderstorms Likely
Chance Rain Showers
Tuesday Night
56°F - Chance Rain Showers
Rain Showers Likely
Wednesday
74°F - Rain Showers Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Wednesday Night
62°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers And Thunderstorms
Thursday
79°F - Showers And Thunderstorms
Mostly Cloudy then Chance Rain Showers
Thursday Night
60°F - Mostly Cloudy then Chance Rain Showers
Chance Rain Showers
Friday
80°F - Chance Rain Showers
Rain Showers Likely
Friday Night
62°F - Rain Showers Likely
Showers And Thunderstorms Likely
Saturday
78°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Saturday Night
57°F - Showers And Thunderstorms Likely
Chance Showers And Thunderstorms
Sunday
75°F - Chance Showers And Thunderstorms
Chance Rain Showers
Sunday Night
56°F - Chance Rain Showers

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: 6:36 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

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: 6:38 AM
Sun Transit: 12:51 AM
Sunset: 7:05 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:45 AM
Moon Transit: 5:11 PM
Moonset: 9:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
4:41 PM - 7:11 PM

Minor Periods

9:04 PM - 10:34 PM
12:15 AM - 1:45 PM

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: 6:38 AM
Sun Transit: 12:51 AM
Sunset: 7:05 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:45 AM
Moon Transit: 5:11 PM
Moonset: 9:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
4:41 PM - 7:11 PM

Minor Periods

9:04 PM - 10:34 PM
12:15 AM - 1:45 PM

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: 6:40 AM
Sun Transit: 12:51 AM
Sunset: 7:03 PM
Daylight: 12 hrs 23 mins
Moonrise: 1:46 PM
Moon Transit: 6:02 PM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
5:32 PM - 8:02 PM

Minor Periods

9:47 PM - 11:17 PM
1:16 PM - 2:46 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: 6:40 AM
Sun Transit: 12:51 AM
Sunset: 7:03 PM
Daylight: 12 hrs 23 mins
Moonrise: 1:46 PM
Moon Transit: 6:02 PM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
5:32 PM - 8:02 PM

Minor Periods

9:47 PM - 11:17 PM
1:16 PM - 2:46 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: 6:41 AM
Sun Transit: 12:51 AM
Sunset: 7:01 PM
Daylight: 12 hrs 21 mins
Moonrise: 2:42 PM
Moon Transit: 6:54 PM
Moonset: 11:07 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:04 AM - 8:34 AM
6:24 PM - 8:54 PM

Minor Periods

12:00 AM - 12:00 AM
2:12 PM - 3:42 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: 6:41 AM
Sun Transit: 12:51 AM
Sunset: 7:01 PM
Daylight: 12 hrs 21 mins
Moonrise: 2:42 PM
Moon Transit: 6:54 PM
Moonset: 11:07 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:04 AM - 8:34 AM
6:24 PM - 8:54 PM

Minor Periods

12:00 AM - 12:00 AM
2:12 PM - 3:42 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: 6:42 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

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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