Byron, Illinois Climate

United States

Pop. 3,648 Elev. 223 m / 732 ft TZ: America/Chicago (UTC-5) ·

Byron has a dry climate with warm summers reaching 85°F (29°C) in July and cold winters averaging 14°F (-10°C) in January. Humidity pushes the summer feels-like temperature to 94°F (34°C), while wind chill can drive winter lows to 5°F (-15°C). Rain falls on about 41 days per year (31.6 in / 803 mm total), with snow on 6 days and 36 in (907 mm) of annual accumulation. The city averages 120 sunny days per year and around 31 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.

Temperature 85°F (30°C) high 14°F (-10°C) low
Feels like 94°F (34°C) high 5°F (-15°C) low
Rain 41 days 31.6 in (803 mm) /yr
Snow 6 days 35.7 in (907 mm) /yr
Sky 120 sunny 31 stormy
Wind 2.4 mph (1.1 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Apr, May, Sep, Oct

Sky & Air by Month

Cloud cover (%)
53
Jan
63
Feb
55
Mar
67
Apr
58
May
53
Jun
59
Jul
52
Aug
39
Sep
46
Oct
56
Nov
76
Dec
Humidity (%)
60
Jan
65
Feb
60
Mar
60
Apr
60
May
63
Jun
72
Jul
73
Aug
68
Sep
67
Oct
67
Nov
75
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 9 mi Chicago Rockford International Airport (RFD)
Ski resort 49 mi
National park 90 mi Historic Pullman Foundation Exhibit Hall
Hospital 13 mi UW Health Women and Children's Hospital
Hiking trail 11 mi Forest Ridge

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 30°F -1°C 14°F -10°C 0.4 in 10 mm 2.2 in56 mm 13
February 33°F 1°C 17°F -8°C 0.2 in 6 mm 7.8 in198 mm 6
March 56°F 13°C 33°F 1°C 3.1 in 80 mm 8.1 in206 mm 9
April 61°F 16°C 42°F 5°C 3.1 in 79 mm 0.1 in2 mm 4
May 70°F 21°C 50°F 10°C 3.0 in 77 mm 12
June 84°F 29°C 64°F 18°C 4.6 in 118 mm 10
July 85°F 30°C 69°F 20°C 6.2 in 157 mm 8
August 80°F 27°C 62°F 17°C 4.9 in 123 mm 14
September 78°F 25°C 56°F 13°C 2.0 in 52 mm 17
October 66°F 19°C 48°F 9°C 1.5 in 39 mm 12
November 49°F 9°C 34°F 1°C 0.9 in 23 mm 10.5 in267 mm 11
December 33°F 1°C 18°F -8°C 1.5 in 39 mm 7.0 in178 mm 4

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 13 0
February 6 0
March 9 4
April 4 2
May 12 1
June 10 4
July 8 6
August 14 7
September 17 5
October 12 1
November 11 0
December 4 1

Water Temperatures Data

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Month Lake Avg High
January 32°F 0°C
February 32°F 0°C
March 38°F 3°C
April 49°F 9°C
May 58°F 15°C
June 70°F 21°C
July 77°F 25°C
August 74°F 23°C
September 67°F 19°C
October 59°F 15°C
November 42°F 6°C
December 32°F 0°C