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 MapMonthly Climate Chart
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
Water Temperatures
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 |