Glastonbury, Connecticut Climate
United States
Pop. 31,876 Elev. 19 m / 62 ft
TZ: America/New_York (UTC-4) ·
Glastonbury sees warm summers peaking at 85°F (29°C) in July, and frigid winters that bottom out around 20°F (-7°C) in January. Humidity pushes the summer feels-like temperature to 94°F (34°C), while wind chill can drive winter lows to 12°F (-11°C). Precipitation occurs on roughly 61 days per year (38.6 in / 980 mm total), with snow on 8 days and 36 in (917 mm) of annual accumulation. The city averages 116 sunny days per year and around 35 thunderstorm days. Ocean water temperatures reach 75°F (24°C) in summer.
| Temperature | 85°F (30°C) high | 20°F (-7°C) low |
| Feels like | 94°F (34°C) high | 12°F (-11°C) low |
| Rain | 61 days | 38.6 in (980 mm) /yr |
| Snow | 8 days | 36.1 in (917 mm) /yr |
| Sky | 116 sunny | 35 stormy |
| Wind | 2.7 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Jun, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
44
Jan 65
Feb 59
Mar 68
Apr 76
May 64
Jun 60
Jul 46
Aug 53
Sep 44
Oct 51
Nov 55
Dec Humidity (%)
57
Jan 61
Feb 55
Mar 53
Apr 71
May 70
Jun 72
Jul 65
Aug 72
Sep 68
Oct 64
Nov 60
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 16 mi Bradley International Airport (BDL)
Ski resort 13 mi Winding Trails Recreation Area
National park 48 mi Connecticut River Greenway State Park
Mountain peak
(5,089 ft) 175 mi Mount Lincoln
Hospital 5 mi Connecticut State Veterans Home and Hospital
Hiking trail 2 mi
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 35°F 1°C | 20°F -7°C | 1.1 in 27 mm | 5.2 in132 mm | 14 |
| February | 37°F 3°C | 23°F -5°C | 1.5 in 38 mm | 16.6 in420 mm | 5 |
| March | 53°F 12°C | 34°F 1°C | 4.1 in 105 mm | 0.1 in2 mm | 9 |
| April | 62°F 17°C | 43°F 6°C | 3.2 in 81 mm | 3.5 in89 mm | 5 |
| May | 68°F 20°C | 52°F 11°C | 8.3 in 211 mm | — | 3 |
| June | 80°F 26°C | 61°F 16°C | 2.5 in 64 mm | — | 9 |
| July | 85°F 30°C | 67°F 20°C | 4.3 in 108 mm | — | 10 |
| August | 81°F 27°C | 59°F 15°C | 2.6 in 66 mm | — | 15 |
| September | 76°F 24°C | 55°F 13°C | 2.9 in 74 mm | — | 10 |
| October | 63°F 17°C | 46°F 8°C | 3.8 in 96 mm | — | 17 |
| November | 50°F 10°C | 35°F 2°C | 2.2 in 55 mm | 0.1 in3 mm | 12 |
| December | 37°F 3°C | 24°F -5°C | 2.2 in 56 mm | 10.7 in271 mm | 7 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 1 |
| February | 5 | 1 |
| March | 9 | 2 |
| April | 5 | 1 |
| May | 3 | 7 |
| June | 9 | 3 |
| July | 10 | 8 |
| August | 15 | 2 |
| September | 10 | 3 |
| October | 17 | 4 |
| November | 12 | 2 |
| December | 7 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 44°F 7°C | 32°F 0°C |
| February | 37°F 3°C | 32°F 0°C |
| March | 41°F 5°C | 38°F 3°C |
| April | 50°F 10°C | 46°F 8°C |
| May | 56°F 13°C | 57°F 14°C |
| June | 67°F 19°C | 66°F 19°C |
| July | 75°F 24°C | 76°F 25°C |
| August | 75°F 24°C | 71°F 22°C |
| September | 72°F 22°C | 65°F 18°C |
| October | 70°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 |