Colchester, Illinois Climate

United States

Pop. 1,337 Elev. 214 m / 702 ft TZ: America/Chicago (UTC-5) ·

Dry and warm, Colchester sees July highs of 89°F (32°C) and cold January lows of 17°F (-8°C). Humidity pushes the summer feels-like temperature to 103°F (39°C), while wind chill can drive winter lows to 9°F (-13°C). Expect around 40 rainy days annually (25.4 in / 646 mm total), with snow on 5 days and 30 in (757 mm) of annual accumulation. The city averages 130 sunny days per year and around 28 thunderstorm days. Nearby lake water reaches 80°F (27°C) in summer.

Temperature 89°F (32°C) high 17°F (-8°C) low
Feels like 103°F (40°C) high 9°F (-13°C) low
Rain 40 days 25.4 in (646 mm) /yr
Snow 5 days 29.8 in (757 mm) /yr
Sky 130 sunny 28 stormy
Wind 2.5 mph (1.1 m/s) avg

Looking for a place with a climate like Colchester? Explore and filter 150,000+ cities worldwide.

Explore on the Map

Monthly Climate Chart

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

Sky & Air by Month

Cloud cover (%)
48
Jan
59
Feb
50
Mar
67
Apr
53
May
52
Jun
65
Jul
49
Aug
41
Sep
44
Oct
50
Nov
68
Dec
Humidity (%)
63
Jan
64
Feb
57
Mar
61
Apr
57
May
64
Jun
69
Jul
68
Aug
54
Sep
58
Oct
64
Nov
77
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

Cities with Similar Climate

Find similar cities on the map →

Nearby Cities

Nearby

Commercial airport 30 mi Southeast Iowa Regional Airport (BRL)
Ski resort 131 mi Hidden Valley
National park 180 mi Pikes Peak State Park
Hospital 7 mi McDonough District Hospital
Hiking trail 57 mi

Interested in Colchester?

Hotels
Flights
Real Estate
Insurance
Connectivity

Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 33°F 1°C 17°F -8°C 0.3 in 9 mm 5.0 in126 mm 12
February 38°F 3°C 22°F -5°C 0.1 in 4 mm 3.9 in100 mm 8
March 61°F 16°C 38°F 3°C 3.5 in 88 mm 5.0 in127 mm 13
April 66°F 19°C 46°F 8°C 4.4 in 111 mm 0.0 in0 mm 6
May 75°F 24°C 53°F 12°C 2.6 in 67 mm 13
June 87°F 30°C 67°F 19°C 3.0 in 77 mm 10
July 89°F 32°C 72°F 22°C 4.3 in 109 mm 8
August 84°F 29°C 65°F 18°C 2.0 in 51 mm 14
September 84°F 29°C 59°F 15°C 0.8 in 21 mm 13
October 72°F 22°C 51°F 11°C 1.3 in 33 mm 14
November 54°F 12°C 37°F 3°C 1.4 in 35 mm 8.0 in203 mm 12
December 38°F 3°C 22°F -6°C 1.6 in 41 mm 7.9 in201 mm 7

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 12 0
February 8 0
March 13 4
April 6 5
May 13 2
June 10 2
July 8 6
August 14 3
September 13 2
October 14 1
November 12 2
December 7 1

Water Temperatures Data

↑ See chart
Month Lake Avg High
January 32°F 0°C
February 32°F 0°C
March 40°F 5°C
April 52°F 11°C
May 61°F 16°C
June 72°F 22°C
July 80°F 27°C
August 76°F 25°C
September 69°F 21°C
October 62°F 17°C
November 45°F 7°C
December 32°F 0°C