Onset, Massachusetts Climate
United States
Pop. 1,573 Elev. 5 m / 16 ft
TZ: America/New_York (UTC-4) ·
Onset sees mild summers peaking at 80°F (27°C) in July, and cold winters that bottom out around 24°F (-4°C) in January. Humidity pushes the summer feels-like temperature to 85°F (29°C), while wind chill can drive winter lows to 15°F (-9°C). Precipitation occurs on roughly 57 days per year (33.9 in / 861 mm total), with snow on 6 days and 29 in (731 mm) of annual accumulation. The city averages 123 sunny days per year and around 20 thunderstorm days. Ocean water temperatures reach 72°F (22°C) in summer.
| Temperature | 80°F (27°C) high | 24°F (-4°C) low |
| Feels like | 85°F (29°C) high | 15°F (-9°C) low |
| Rain | 57 days | 33.9 in (861 mm) /yr |
| Snow | 6 days | 28.8 in (731 mm) /yr |
| Sky | 123 sunny | 20 stormy |
| Wind | 3.8 mph (1.7 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jun, Jul, Aug, Sep
Sky & Air by Month
Cloud cover (%)
43
Jan 61
Feb 62
Mar 65
Apr 74
May 62
Jun 59
Jul 44
Aug 56
Sep 46
Oct 47
Nov 54
Dec Humidity (%)
58
Jan 61
Feb 65
Mar 63
Apr 74
May 73
Jun 78
Jul 71
Aug 78
Sep 73
Oct 66
Nov 64
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 16 mi New Bedford Regional Airport (EWB)
Ski resort 39 mi St. Moritz Park
National park 109 mi Connecticut River Greenway State Park
Mountain peak
(5,460 ft) 176 mi Boott Spur
Hospital 3 mi Tobey Hospital
Hiking trail 3 mi American Perimeter Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 36°F 2°C | 24°F -4°C | 1.4 in 36 mm | 4.6 in117 mm | 16 |
| February | 39°F 4°C | 27°F -3°C | 1.6 in 41 mm | 15.4 in390 mm | 8 |
| March | 49°F 9°C | 36°F 2°C | 4.4 in 111 mm | 0.1 in2 mm | 8 |
| April | 57°F 14°C | 44°F 7°C | 4.2 in 106 mm | 0.1 in3 mm | 7 |
| May | 64°F 18°C | 53°F 12°C | 4.5 in 115 mm | — | 5 |
| June | 76°F 24°C | 63°F 17°C | 1.6 in 40 mm | — | 9 |
| July | 80°F 27°C | 69°F 20°C | 3.0 in 76 mm | — | 8 |
| August | 76°F 25°C | 63°F 17°C | 1.8 in 46 mm | — | 14 |
| September | 72°F 22°C | 60°F 15°C | 1.8 in 45 mm | — | 9 |
| October | 62°F 17°C | 51°F 10°C | 4.3 in 110 mm | — | 16 |
| November | 51°F 11°C | 39°F 4°C | 2.3 in 57 mm | 0.0 in0 mm | 13 |
| December | 40°F 5°C | 27°F -3°C | 3.0 in 77 mm | 8.6 in218 mm | 10 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 16 | 2 |
| February | 8 | 1 |
| March | 8 | 1 |
| April | 7 | 3 |
| May | 5 | 4 |
| June | 9 | 0 |
| July | 8 | 1 |
| August | 14 | 0 |
| September | 9 | 2 |
| October | 16 | 2 |
| November | 13 | 2 |
| December | 10 | 2 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 43°F 6°C | 33°F 0°C |
| February | 37°F 3°C | 32°F 0°C |
| March | 42°F 6°C | 41°F 5°C |
| April | 50°F 10°C | 49°F 9°C |
| May | 59°F 15°C | 59°F 15°C |
| June | 70°F 21°C | 69°F 20°C |
| July | 72°F 22°C | 76°F 24°C |
| August | 72°F 22°C | 71°F 22°C |
| September | 70°F 21°C | 67°F 19°C |
| October | 68°F 20°C | 57°F 14°C |
| November | 58°F 14°C | 44°F 7°C |
| December | 48°F 9°C | 34°F 1°C |