Water Temperature of the Rock River in Byron, IL

Current Water Temperature

73.9°F

Measurement Time: Sunday, August 30, 2026, 6:15 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

74°F

Conditions: Slight Chance Showers And Thunderstorms

Humidity: 75%

Wind: S 10 mph

Dew Point: 66°F

Weather Forecast

Overnight
71°F - Slight Chance Showers And Thunderstorms

Monday
88°F - Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms

Monday Night
73°F - Slight Chance Showers And Thunderstorms

Tuesday
90°F - Slight Chance Showers And Thunderstorms

Tuesday Night
73°F - Partly Cloudy

Wednesday
91°F - Mostly Sunny

Wednesday Night
71°F - Slight Chance Showers And Thunderstorms

Thursday
86°F - Chance Showers And Thunderstorms

Thursday Night
68°F - Slight Chance Showers And Thunderstorms

Friday
85°F - Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms

Friday Night
65°F - Partly Cloudy then Slight Chance Showers And Thunderstorms

Saturday
85°F - Slight Chance Showers And Thunderstorms then Mostly Sunny

Saturday Night
62°F - Partly Cloudy

Sunday
83°F - Mostly Sunny

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:57 AM
Sunset: 7:32 PM
Daylight: 13 hrs 10 mins

Moonrise: 8:55 PM
Moon Transit: 3:13 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:13 PM - 5:43 PM

Minor Periods

8:25 PM - 9:55 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:22 AM
Sun Transit: 12:57 AM
Sunset: 7:32 PM
Daylight: 13 hrs 10 mins

Moonrise: 8:55 PM
Moon Transit: 3:13 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:13 PM - 5:43 PM

Minor Periods

8:25 PM - 9:55 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:22 AM
Sun Transit: 12:57 AM
Sunset: 7:32 PM
Daylight: 13 hrs 10 mins

Moonrise: 8:55 PM
Moon Transit: 3:13 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:13 PM - 5:43 PM

Minor Periods

8:25 PM - 9:55 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:22 AM
Sun Transit: 12:57 AM
Sunset: 7:32 PM
Daylight: 13 hrs 10 mins

Moonrise: 8:55 PM
Moon Transit: 3:13 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:13 PM - 5:43 PM

Minor Periods

8:25 PM - 9:55 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:23 AM
Sun Transit: 12:56 AM
Sunset: 7:30 PM
Daylight: 13 hrs 7 mins

Moonrise: 9:23 PM
Moon Transit: 4:02 AM
Moonset: 11:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
4:03 PM - 6:33 PM

Minor Periods

8:53 PM - 10:23 PM
10:53 AM - 12:23 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:23 AM
Sun Transit: 12:56 AM
Sunset: 7:30 PM
Daylight: 13 hrs 7 mins

Moonrise: 9:23 PM
Moon Transit: 4:02 AM
Moonset: 11:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
4:03 PM - 6:33 PM

Minor Periods

8:53 PM - 10:23 PM
10:53 AM - 12:23 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:24 AM
Sun Transit: 12:56 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins

Moonrise: 9:58 PM
Moon Transit: 4:54 AM
Moonset: 12:39 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
4:58 PM - 7:28 PM

Minor Periods

9:28 PM - 10:58 PM
12:09 AM - 1:39 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:24 AM
Sun Transit: 12:56 AM
Sunset: 7:29 PM
Daylight: 13 hrs 5 mins

Moonrise: 9:58 PM
Moon Transit: 4:54 AM
Moonset: 12:39 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
4:58 PM - 7:28 PM

Minor Periods

9:28 PM - 10:58 PM
12:09 AM - 1:39 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:25 AM
Sun Transit: 12:56 AM
Sunset: 7:27 PM
Daylight: 13 hrs 2 mins

Moonrise: 10:42 PM
Moon Transit: 5:50 AM
Moonset: 1:54 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:20 AM - 7:50 AM
5:56 PM - 8:26 PM

Minor Periods

10:12 PM - 11:42 PM
1:24 PM - 2:54 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:25 AM
Sun Transit: 12:56 AM
Sunset: 7:27 PM
Daylight: 13 hrs 2 mins

Moonrise: 10:42 PM
Moon Transit: 5:50 AM
Moonset: 1:54 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:20 AM - 7:50 AM
5:56 PM - 8:26 PM

Minor Periods

10:12 PM - 11:42 PM
1:24 PM - 2:54 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:26 AM
Sun Transit: 12:55 AM
Sunset: 7:25 PM
Daylight: 12 hrs 59 mins

Moonrise: 11:38 PM
Moon Transit: 6:51 AM
Moonset: 3:05 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
6:58 PM - 9:28 PM

Minor Periods

12:00 AM - 12:00 AM
2:35 PM - 4:05 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:26 AM
Sun Transit: 12:55 AM
Sunset: 7:25 PM
Daylight: 12 hrs 59 mins

Moonrise: 11:38 PM
Moon Transit: 6:51 AM
Moonset: 3:05 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
6:58 PM - 9:28 PM

Minor Periods

12:00 AM - 12:00 AM
2:35 PM - 4:05 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins

Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:27 AM
Sun Transit: 12:55 AM
Sunset: 7:24 PM
Daylight: 12 hrs 57 mins

Moonrise: 12:38 AM
Moon Transit: 7:53 AM
Moonset: 4:07 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
8:01 PM - 10:31 PM

Minor Periods

3:37 PM - 5:07 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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

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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