Water Temperature of the Rock River in Byron, IL

Current Water Temperature

78.4°F

Measurement Time: Saturday, September 5, 2026, 11:15 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

63°F
Patchy Fog
Patchy Fog
100%
NE 5 mph
63°F

Weather Forecast

Patchy Fog
Overnight
60°F - Patchy Fog
Patchy Fog then Mostly Sunny
Sunday
82°F - Patchy Fog then Mostly Sunny
Mostly Clear
Sunday Night
56°F - Mostly Clear
Sunny
Labor Day
81°F - Sunny
Partly Cloudy
Monday Night
59°F - Partly Cloudy
Mostly Sunny
Tuesday
86°F - Mostly Sunny
Mostly Cloudy then Showers And Thunderstorms Likely
Tuesday Night
71°F - Mostly Cloudy then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Wednesday
86°F - Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Partly Cloudy
Wednesday Night
58°F - Partly Cloudy
Mostly Sunny
Thursday
80°F - Mostly Sunny
Mostly Clear
Thursday Night
55°F - Mostly Clear
Sunny
Friday
82°F - Sunny
Mostly Clear
Friday Night
58°F - Mostly Clear
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Saturday
84°F - Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 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: 6:28 AM
Sun Transit: 12:55 AM
Sunset: 7:22 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:47 AM
Moon Transit: 8:56 AM
Moonset: 4:58 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:03 PM - 11:33 PM

Minor Periods

4:28 PM - 5:58 PM
12:17 AM - 1:47 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: 6:29 AM
Sun Transit: 12:54 AM
Sunset: 7:20 PM
Daylight: 12 hrs 51 mins
Moonrise: 2:02 AM
Moon Transit: 9:56 AM
Moonset: 5:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

5:07 PM - 6:37 PM
1:32 AM - 3:02 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: 6:29 AM
Sun Transit: 12:54 AM
Sunset: 7:20 PM
Daylight: 12 hrs 51 mins
Moonrise: 2:02 AM
Moon Transit: 9:56 AM
Moonset: 5:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

5:07 PM - 6:37 PM
1:32 AM - 3:02 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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:18 PM
Daylight: 12 hrs 48 mins
Moonrise: 3:21 AM
Moon Transit: 10:52 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

5:39 PM - 7:09 PM
2:51 AM - 4:21 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: 6:30 AM
Sun Transit: 12:54 AM
Sunset: 7:18 PM
Daylight: 12 hrs 48 mins
Moonrise: 3:21 AM
Moon Transit: 10:52 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:22 AM - 12:52 AM

Minor Periods

5:39 PM - 7:09 PM
2:51 AM - 4:21 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

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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