Weather for Byron, Illinois
Current Weather
66.9°F
Moderate rain
65.3°F
66.9°F
95%
ESE 12.8 mph
19.3 mph
66.9°F
65.6°F
0.11 in
100%
6 mi
1007 mbar
0
Five Day Weather Forecast
Sat
H: 69°F
L: 66°F
Sun
H: 74°F
L: 61°F
Mon
H: 78°F
L: 55°F
Tue
H: 80°F
L: 57°F
Wed
H: 80°F
L: 63°F
Air Quality
AQI:
2 - Moderate
PM2.5:
2.5 μg/m3
PM10:
2.6 μg/m3
Carbon Monoxide: 133 μg/m3
Nitrogen Dioxide: 8.4 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 71 μg/m3
Nitrogen Dioxide: 8.4 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 71 μg/m3
Astronomical
Sunrise: 5:50 AM
Sun Transit: 1:03 PM
Sunset: 8:16 PM
Daylight: 14 hrs 26 mins
Sun Transit: 1:03 PM
Sunset: 8:16 PM
Daylight: 14 hrs 26 mins
Moonrise: 9:44 PM
Moon Transit: 3:03 AM
Moonset: 8:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%
Moon Transit: 3:03 AM
Moonset: 8:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%
Best Times for Fishing or Hunting
Major Periods
2:33 AM - 5:03 AM3:00 PM - 5:30 PM
Minor Periods
9:14 PM - 10:44 PM8:23 AM - 9:53 AM
Action Rating: 2 out of 5
Hydrologic Outlook issued July 31 at 2:19PM CDT by NWS Chicago IL
Effective: Fri July 31, 2026, 2:19 PM
Expires: Sat August 1, 2026, 4:00 AM
ESFLOT A slow moving weather system will bring widespread showers, some heavy, to the area through Saturday. Rainfall may cause ponding in poor drainage areas, rises on area streams, and localized flooding. The most likely areas for flooding include urban areas and areas that received rainfall earlier this week. Conditions will be favorable for rainfall rates in excess of 1 inch per hour in isolated areas. The exact locations expected to receive the heaviest rainfall remains uncertain at this time. This outlook means that elevated water levels and potential impacts are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories.
Saturday, August 1, 2026
Weather Forecast
Patchy rain nearby
69.1°F
65.6°F
66.7°F
95%
1.34 in
93%
0%
15.7 mph
0.6
Air Quality
AQI:
1 - Good
PM2.5:
3.13 μg/m3
PM10:
3.2 μg/m3
Carbon Monoxide: 140.54 μg/m3
Nitrogen Dioxide: 4.57 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 70.5 μg/m3
Nitrogen Dioxide: 4.57 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 70.5 μg/m3
Astronomical
Sunrise: 5:50 AM
Sun Transit: 1:03 PM
Sunset: 8:16 PM
Daylight: 14 hrs 26 mins
Sun Transit: 1:03 PM
Sunset: 8:16 PM
Daylight: 14 hrs 26 mins
Moonrise: 9:44 PM
Moon Transit: 3:03 AM
Moonset: 8:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%
Moon Transit: 3:03 AM
Moonset: 8:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%
Best Times for Fishing or Hunting
Major Periods
2:33 AM - 5:03 AM3:00 PM - 5:30 PM
Minor Periods
9:14 PM - 10:44 PM8:23 AM - 9:53 AM
Action Rating: 2 out of 5
Sunday, August 2, 2026
Weather Forecast
Overcast
73.8°F
60.7°F
66.8°F
88%
0.02 in
52%
0%
15.2 mph
5.5
Air Quality
AQI:
1 - Good
PM2.5:
2.34 μg/m3
PM10:
2.44 μg/m3
Carbon Monoxide: 134.29 μg/m3
Nitrogen Dioxide: 3.12 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 58.13 μg/m3
Nitrogen Dioxide: 3.12 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 58.13 μg/m3
Astronomical
Sunrise: 5:51 AM
Sun Transit: 1:03 PM
Sunset: 8:15 PM
Daylight: 14 hrs 24 mins
Sun Transit: 1:03 PM
Sunset: 8:15 PM
Daylight: 14 hrs 24 mins
Moonrise: 10:04 PM
Moon Transit: 3:46 AM
Moonset: 10:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%
Moon Transit: 3:46 AM
Moonset: 10:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%
Best Times for Fishing or Hunting
Major Periods
3:16 AM - 5:46 AM5:20 PM - 7:50 PM
Minor Periods
9:34 PM - 11:04 PM9:30 AM - 11:00 AM
Action Rating: 4 out of 5
Monday, August 3, 2026
Weather Forecast
Sunny
78.2°F
54.7°F
66.8°F
80%
0 in
13%
0%
6.3 mph
8.9
Air Quality
AQI:
1 - Good
PM2.5:
2.79 μg/m3
PM10:
2.88 μg/m3
Carbon Monoxide: 137.04 μg/m3
Nitrogen Dioxide: 5.6 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 55 μg/m3
Nitrogen Dioxide: 5.6 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 55 μg/m3
Astronomical
Sunrise: 5:52 AM
Sun Transit: 1:03 PM
Sunset: 8:14 PM
Daylight: 14 hrs 21 mins
Sun Transit: 1:03 PM
Sunset: 8:14 PM
Daylight: 14 hrs 21 mins
Moonrise: 10:26 PM
Moon Transit: 12:00 AM
Moonset: 11:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%
Moon Transit: 12:00 AM
Moonset: 11:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:00 AM - 12:00 AM
Minor Periods
9:56 PM - 11:26 PM10:38 AM - 12:08 AM
Action Rating: 2 out of 5
Tuesday, August 4, 2026
Weather Forecast
Sunny
79.8°F
56.8°F
68.6°F
80%
0 in
13%
0%
7.4 mph
9.1
Air Quality
AQI:
1 - Good
PM2.5:
6.9 μg/m3
PM10:
7 μg/m3
Carbon Monoxide: 176.85 μg/m3
Nitrogen Dioxide: 13.55 μg/m3
Sulphur Dioxide: 1.88 μg/m3
Ozone: 64.33 μg/m3
Nitrogen Dioxide: 13.55 μg/m3
Sulphur Dioxide: 1.88 μg/m3
Ozone: 64.33 μg/m3
Astronomical
Sunrise: 5:53 AM
Sun Transit: 1:03 PM
Sunset: 8:12 PM
Daylight: 14 hrs 19 mins
Sun Transit: 1:03 PM
Sunset: 8:12 PM
Daylight: 14 hrs 19 mins
Moonrise: 10:51 PM
Moon Transit: 5:15 AM
Moonset: 12:19 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%
Moon Transit: 5:15 AM
Moonset: 12:19 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%
Best Times for Fishing or Hunting
Major Periods
4:45 AM - 7:15 AM5:15 PM - 7:45 PM
Minor Periods
10:21 PM - 11:51 PM11:49 AM - 1:19 PM
Action Rating: 3 out of 5
Wednesday, August 5, 2026
Weather Forecast
Sunny
80.1°F
62.8°F
71.5°F
83%
0.02 in
36%
0%
8.7 mph
7
Air Quality
AQI:
2 - Moderate
PM2.5:
17.93 μg/m3
PM10:
18.1 μg/m3
Carbon Monoxide: 404.88 μg/m3
Nitrogen Dioxide: 48.44 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 7.75 μg/m3
Nitrogen Dioxide: 48.44 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 7.75 μg/m3
Astronomical
Sunrise: 5:54 AM
Sun Transit: 1:03 PM
Sunset: 8:11 PM
Daylight: 14 hrs 17 mins
Sun Transit: 1:03 PM
Sunset: 8:11 PM
Daylight: 14 hrs 17 mins
Moonrise: 11:20 PM
Moon Transit: 6:04 AM
Moonset: 1:32 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%
Moon Transit: 6:04 AM
Moonset: 1:32 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%
Best Times for Fishing or Hunting
Major Periods
5:34 AM - 8:04 AM6:06 PM - 8:36 PM
Minor Periods
12:00 AM - 12:00 AM1:02 PM - 2:32 PM
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.