Water Temperature of the Rock River in Byron, IL

Current Water Temperature

57.7°F 14.3°C
Cold Thermal Gear Required
57.7°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Thursday, November 5, 2026, 2:15 PM CST

Temperature Locations

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Local Points of Interest

River Park East; Hamas Park; Sunshine Park; Byron Forest Preserve District

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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

46.1°F
Overcast
Conditions: Overcast
Humidity: 76%
Feels Like: 40.1°F
Wind: N 13.4 mph
Wind Gusts: 22.4 mph
Pressure: 29.99 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Patchy rain nearby
Thu
H: 53°F
L: 44°F
Sunny
Fri
H: 47°F
L: 34°F
Sunny
Sat
H: 50°F
L: 31°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
1 μg/m³
Good
PM10
1 μg/m³
Good
Ozone (O3)
57 μg/m³
Photochemical
NO2
4.2 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
134 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 11m daylight
Sunrise 6:35 AM
Solar Noon 11:40 AM
Sunset 4:46 PM
Moon
Waning Crescent • 11%
Moonrise 2:48 AM
Transit 8:53 AM
Moonset 2:49 PM

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
8:45 PM - 11:15 PM

Minor Periods

2:18 AM - 3:48 AM
2:19 PM - 3:49 PM
Action Rating:
Fair Action 2/5
Thursday, November 5, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 48.3°F
Average Humidity: 80%
Chance of Rain: 62%
Wind: 14.3 mph
UV Index: 0.2

Astronomical

Sun
10h 11m daylight
Sunrise 6:35 AM
Solar Noon 11:40 AM
Sunset 4:46 PM
Moon
Waning Crescent • 11%
Moonrise 2:48 AM
Transit 8:53 AM
Moonset 2:49 PM

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
8:45 PM - 11:15 PM

Minor Periods

2:18 AM - 3:48 AM
2:19 PM - 3:49 PM
Action Rating:
Fair Action 2/5
Friday, November 6, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 40.4°F
Average Humidity: 63%
Chance of Rain: 6%
Wind: 12.8 mph
UV Index: 2.4

Astronomical

Sun
10h 8m daylight
Sunrise 6:37 AM
Solar Noon 11:40 AM
Sunset 4:45 PM
Moon
Waning Crescent • 5%
Moonrise 3:55 AM
Transit 9:37 AM
Moonset 3:10 PM

Best Times for Fishing or Hunting

Major Periods

9:07 AM - 11:37 AM
9:30 PM - 12:00 AM

Minor Periods

3:25 AM - 4:55 AM
2:40 PM - 4:10 PM
Action Rating:
Fair Action 2/5
Saturday, November 7, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 39.3°F
Average Humidity: 68%
Chance of Rain: 8%
Wind: 8.3 mph
UV Index: 2.4

Astronomical

Sun
10h 6m daylight
Sunrise 6:38 AM
Solar Noon 11:40 AM
Sunset 4:44 PM
Moon
Waning Crescent • 1%
Moonrise 5:02 AM
Transit 10:21 AM
Moonset 3:33 PM

Best Times for Fishing or Hunting

Major Periods

9:51 AM - 12:21 PM
10:14 PM - 12:44 AM

Minor Periods

4:32 AM - 6:02 AM
3:03 PM - 4:33 PM
Action Rating:
Good Action 3/5
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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