Colchester, Connecticut Climate
United States
Pop. 4,781 Elev. 146 m / 479 ft
TZ: America/New_York (UTC-4) ·
Summers in Colchester are warm, with July highs around 85°F (29°C), while winters are frigid with January lows of 22°F (-6°C). Humidity pushes the summer feels-like temperature to 93°F (34°C), while wind chill can drive winter lows to 13°F (-11°C). Expect around 59 rainy days annually (37.7 in / 957 mm total), with snow on 7 days and 30 in (767 mm) of annual accumulation. The city averages 126 sunny days per year and around 31 thunderstorm days. Ocean water temperatures reach 73°F (23°C) in summer.
| Temperature | 85°F (29°C) high | 22°F (-6°C) low |
| Feels like | 93°F (34°C) high | 13°F (-10°C) low |
| Rain | 59 days | 37.7 in (957 mm) /yr |
| Snow | 7 days | 30.2 in (767 mm) /yr |
| Sky | 126 sunny | 31 stormy |
| Wind | 3.2 mph (1.4 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Jun, Jul, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
42
Jan 64
Feb 58
Mar 68
Apr 74
May 64
Jun 61
Jul 46
Aug 53
Sep 43
Oct 49
Nov 53
Dec Humidity (%)
56
Jan 58
Feb 56
Mar 55
Apr 71
May 69
Jun 71
Jul 64
Aug 71
Sep 67
Oct 62
Nov 60
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 31 mi Bradley International Airport (BDL)
Ski resort 22 mi Powder Ridge Ski Area
National park 58 mi Connecticut River Greenway State Park
Mountain peak
(5,089 ft) 181 mi Mount Lincoln
Hospital 8 mi Middlesex Health Marlborough Medical Center
Hiking trail 3 mi
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 35°F 2°C | 22°F -6°C | 1.3 in 32 mm | 4.0 in101 mm | 16 |
| February | 39°F 4°C | 26°F -4°C | 1.6 in 40 mm | 15.9 in405 mm | 6 |
| March | 52°F 11°C | 35°F 2°C | 4.6 in 117 mm | 0.1 in1 mm | 9 |
| April | 61°F 16°C | 44°F 7°C | 3.7 in 94 mm | 0.5 in13 mm | 6 |
| May | 67°F 19°C | 52°F 11°C | 7.9 in 200 mm | — | 3 |
| June | 79°F 26°C | 62°F 17°C | 2.0 in 51 mm | — | 10 |
| July | 85°F 29°C | 68°F 20°C | 3.6 in 92 mm | — | 9 |
| August | 81°F 27°C | 60°F 16°C | 2.5 in 62 mm | — | 15 |
| September | 76°F 24°C | 57°F 14°C | 2.5 in 64 mm | — | 10 |
| October | 63°F 17°C | 48°F 9°C | 3.6 in 91 mm | — | 18 |
| November | 51°F 11°C | 37°F 3°C | 2.1 in 55 mm | 0.0 in1 mm | 14 |
| December | 38°F 4°C | 25°F -4°C | 2.3 in 57 mm | 9.7 in246 mm | 10 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 16 | 1 |
| February | 6 | 1 |
| March | 9 | 2 |
| April | 6 | 3 |
| May | 3 | 7 |
| June | 10 | 3 |
| July | 9 | 5 |
| August | 15 | 2 |
| September | 10 | 2 |
| October | 18 | 2 |
| November | 14 | 2 |
| December | 10 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 45°F 7°C | 32°F 0°C |
| February | 38°F 3°C | 32°F 0°C |
| March | 42°F 6°C | 38°F 3°C |
| April | 49°F 9°C | 46°F 8°C |
| May | 56°F 13°C | 57°F 14°C |
| June | 65°F 18°C | 66°F 19°C |
| July | 72°F 22°C | 76°F 25°C |
| August | 73°F 23°C | 71°F 22°C |
| September | 71°F 21°C | 65°F 18°C |
| October | 69°F 21°C | 57°F 14°C |
| November | 60°F 15°C | 43°F 6°C |
| December | 50°F 10°C | 33°F 1°C |