Temperature
Cold by day, cold at night.
45°Ftypical December high
Typical range
December climate
December in Martha's Vineyard
United States · Northeast US
Cold weather and wind on exposed beaches are the main limitations.
Some tradeoffs
Daytime high
45°F
Lows around 37°F
Rain
Several rainy days
Sun
6 h/day
Air feel
Very dry
Sea temp
47°F
Too cold for swimming
Wind
16 mph
Windy
When to visit
Month-by-month fit
Best
Precipitation
Several rainy days. About 11 wet days, the highest monthly average.
35%wet-day frequency
AmountWet-day chance
Sunshine
A mix of sunshine and cloud.
5.8 hDecember sunshine
Heat & humidity by month
Humidity is rarely noticeable in the cool air.
Very dryDecember Heat feel
Easy airHumid air
Hourly temperature pattern
In December, afternoons feel about 29° and nights feel near 26°.
FreezingVery coldColdCoolComfortableNight hours
Clear sky
Mostly cloudy skies this month.
40%December Clear sky
Clear skyCloud
Wind pattern
Wind can affect exposed beach comfort.
16 mphDecember Windy
Sea temperature
47°FDecember sea temp
More detailIncludes daypart comfort
Typical December day
December late afternoons are around 41°F, and early evening stays near 41°F.
Avg temp Typical range
Morning39°F
Rain18%
Cloud59%
Humid airLow
Sun intensityLow
Midday41°F
Rain17%
Cloud63%
Humid airLow
Sun intensityLow
Late afternoon41°F
Rain17%
Cloud63%
Humid airLow
Sun intensityMinimal
Best windowEarly evening41°F
Rain18%
Cloud60%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 39 | 30 | 4.5 | 11 | 6.4 | 72 | 42 |
| Feb | 38 | 30 | 3.8 | 10 | 7.2 | 72 | 40 |
| Mar | 42 | 35 | 4.6 | 11 | 8.3 | 73 | 39 |
| Apr | 48 | 43 | 4.3 | 11 | 9.4 | 77 | 43 |
| May | 56 | 52 | 3.8 | 11 | 10.3 | 83 | 49 |
| Jun | 65 | 61 | 3.3 | 9 | 11.4 | 85 | 58 |
| Jul | 72 | 68 | 2.9 | 8 | 11.9 | 86 | 66 |
| Aug | 72 | 69 | 3.2 | 8 | 11.1 | 84 | 68 |
| Sep | 68 | 64 | 4.0 | 8 | 9.5 | 80 | 65 |
| Oct | 60 | 55 | 4.9 | 10 | 8.1 | 75 | 59 |
| Nov | 52 | 45 | 3.8 | 9 | 6.5 | 72 | 53 |
| Dec | 45 | 37 | 4.9 | 11 | 5.8 | 72 | 47 |
Similar climates
Similar
Similar travel styleNantucketUnited StatesSimilar travel styleEast HamptonUnited StatesSimilar travel styleFire IslandUnited StatesSimilar travel styleLong Beach IslandUnited States
Want a side-by-side climate view? Compare Martha's Vineyard with Nantucket.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology