Water Temperature of the Rock River in Byron, IL

Current Water Temperature

79.5°F

Measurement Time: Wednesday, July 1, 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

75.9°F
Clear
Clear
80.1°F
80.8°F
91%
SW 11 mph
21 mph
76.5°F
72.4°F
0 in
25%
9 mi
1016 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 99°F
L: 76°F
Sunny
Fri
H: 87°F
L: 68°F
Patchy rain nearby
Sat
H: 88°F
L: 72°F
Fog
Sun
H: 85°F
L: 64°F
Sunny
Mon
H: 81°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 3.8 μg/m3
PM10: 4.5 μg/m3
Carbon Monoxide: 122 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 12 mins
Moonrise: 10:35 PM
Moon Transit: 2:52 AM
Moonset: 7:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:22 AM - 4:52 AM
2:51 PM - 5:21 PM

Minor Periods

10:05 PM - 11:35 PM
7:13 AM - 8:43 AM

Action Rating: 2 out of 5

Extreme Heat Warning issued July 1 at 3:09PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Effective: Wed July 1, 2026, 3:09 PM
Expires: Thu July 2, 2026, 1:15 AM

* WHAT...Dangerously hot conditions with peak afternoon heat index values of 100 to 105 degrees expected. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until midnight CDT /1 AM EDT/ Thursday Night. * IMPACTS...Heat related illnesses increase during heat waves. * ADDITIONAL DETAILS...Dangerous heat is expected to persist through Thursday. Thunderstorms may begin to bring some relief from the heat for portions of northern Illinois by Thursday afternoon or evening.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Extreme Heat Warning issued July 2 at 3:03AM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Effective: Thu July 2, 2026, 3:03 AM
Expires: Thu July 2, 2026, 1:15 PM

* WHAT...Dangerously hot conditions with peak heat index values up to 105 degrees. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until midnight CDT /1 AM EDT/ tonight. * IMPACTS...Heat related illnesses increase during heat waves.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Thursday, July 2, 2026

Weather Forecast

Sunny
99.3°F
76.1°F
84.4°F
74%
0.02 in
36%
0%
15.9 mph
10.1


Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 6.84 μg/m3
Carbon Monoxide: 119.38 μg/m3
Nitrogen Dioxide: 4.42 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 73.21 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 12 mins
Moonrise: 10:35 PM
Moon Transit: 2:52 AM
Moonset: 7:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:22 AM - 4:52 AM
2:51 PM - 5:21 PM

Minor Periods

10:05 PM - 11:35 PM
7:13 AM - 8:43 AM

Action Rating: 2 out of 5

Friday, July 3, 2026

Weather Forecast

Sunny
87.1°F
68.2°F
77.5°F
86%
0.19 in
73%
0%
13 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 4.08 μg/m3
PM10: 4.68 μg/m3
Carbon Monoxide: 129.25 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 65.58 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 11 mins
Moonrise: 10:57 PM
Moon Transit: 3:37 AM
Moonset: 8:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
3:35 PM - 6:05 PM

Minor Periods

10:27 PM - 11:57 PM
8:19 AM - 9:49 AM

Action Rating: 3 out of 5

Saturday, July 4, 2026

Weather Forecast

Patchy rain nearby
88.2°F
71.7°F
79.8°F
85%
0.26 in
78%
0%
13.4 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 4.14 μg/m3
PM10: 4.57 μg/m3
Carbon Monoxide: 132.04 μg/m3
Nitrogen Dioxide: 5.82 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 74.29 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:01 PM
Sunset: 8:37 PM
Daylight: 15 hrs 10 mins
Moonrise: 11:18 PM
Moon Transit: 4:21 AM
Moonset: 9:55 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.6%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
4:18 PM - 6:48 PM

Minor Periods

12:00 AM - 12:00 AM
9:25 AM - 10:55 AM

Action Rating: 2 out of 5

Sunday, July 5, 2026

Weather Forecast

Fog
84.8°F
64.1°F
74.5°F
89%
0.9 in
88%
0%
11.9 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 2.74 μg/m3
PM10: 3.05 μg/m3
Carbon Monoxide: 134.46 μg/m3
Nitrogen Dioxide: 5.52 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 66.33 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 1:01 PM
Sunset: 8:36 PM
Daylight: 15 hrs 9 mins
Moonrise: 12:18 AM
Moon Transit: 5:03 AM
Moonset: 11:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.8%

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
5:01 PM - 7:31 PM

Minor Periods

10:31 AM - 12:01 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 6, 2026

Weather Forecast

Sunny
80.9°F
55.5°F
70.5°F
86%
0.21 in
74%
0%
7.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.74 μg/m3
PM10: 3.84 μg/m3
Carbon Monoxide: 212.38 μg/m3
Nitrogen Dioxide: 14.33 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 38.13 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:01 PM
Sunset: 8:36 PM
Daylight: 15 hrs 8 mins
Moonrise: 12:38 AM
Moon Transit: 12:15 AM
Moonset: 12:08 AM
Moon Phase: Last Quarter
Moon Illumination: 48.6%

Best Times for Fishing or Hunting

Major Periods

11:45 AM - 2:15 PM
11:45 AM - 2:15 PM

Minor Periods

11:38 AM - 1:08 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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