Boston vs Martha's Vineyard: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 113 km apart · long-term climate normals (NASA POWER, 2001–2020)
Boston and Martha's Vineyard are virtually tied for annual sunshine — about 2,157 vs 2,196 hours a year. Martha's Vineyard has the higher Sunshine Score in 4 of 12 months, Boston in 3 (5 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Boston | Martha's Vineyard | |
|---|---|---|
| Sunshine hours / year | 2,157 | 2,196 |
| Sunniest month | July (74/100) | July (77/100) |
| Nov–Feb average score | 3/100 | 5/100 |
| Jun–Aug average score | 73/100 | 76/100 |
| Rain / year | 1,207 mm | 1,155 mm |
| Warmest sea | 20°C / 68°F | 21°C / 70°F |
| Peak midday UV | 7 (high) | 7 (high) |
Boston vs Martha's Vineyard month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Boston | Martha's Vineyard | Boston | Martha's Vineyard | Boston | Martha's Vineyard | Boston | Martha's Vineyard | |
| January | 0 | 0 | 1° | 3° | 80 | 90 | 4° | 6° |
| February | 0 | 0 | 2° | 3° | 86 | 84 | 4° | 4° |
| March | 0 | 0 | 6° | 5° | 110 | 109 | 5° | 5° |
| April | 30 | 12 | 13° | 10° | 107 | 103 | 8° | 8° |
| May | 68 | 38 | 19° | 14° | 95 | 86 | 13° | 12° |
| June | 71 | 75 | 24° | 20° | 113 | 92 | 18° | 17° |
| July | 74 | 77 | 28° | 24° | 94 | 79 | 19° | 21° |
| August | 74 | 77 | 28° | 24° | 93 | 78 | 20° | 21° |
| September | 74 | 74 | 24° | 21° | 92 | 96 | 19° | 20° |
| October | 52 | 47 | 17° | 16° | 123 | 118 | 15° | 17° |
| November | 12 | 18 | 10° | 11° | 98 | 105 | 10° | 13° |
| December | 0 | 0 | 4° | 7° | 116 | 115 | 6° | 8° |
The sunnier month by month: Jan even · Feb even · Mar even · Apr Boston · May Boston · Jun Martha's Vineyard · Jul Martha's Vineyard · Aug Martha's Vineyard · Sep even · Oct Boston · Nov Martha's Vineyard · Dec even.
When to pick which
- November–February: too close to call — Boston averages 3/100, Martha's Vineyard 5/100. Martha's Vineyard is the warmer, around 6°C daytime highs vs 4°C. See the winter sun ranking.
- March–May: Boston (average score 33/100 vs 17). Boston is the warmer, around 13°C daytime highs vs 10°C.
- June–August: Martha's Vineyard (average score 76/100 vs 73). Boston is the warmer, around 27°C daytime highs vs 23°C.
- September–October: too close to call — Boston averages 63/100, Martha's Vineyard 61/100. Boston is the warmer, around 21°C daytime highs vs 19°C.
Sea temperature
Martha's Vineyard's sea gets warmer: 21°C / 70°F at its peak vs 20°C. Swimmable water (21°C+): Boston never, Martha's Vineyard about 2 months a year. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Boston weather by month · Martha's Vineyard weather by month · Best time to visit United States.
More comparisons: Boston vs Providence/Warwick · Boston vs Manchester · Boston vs Portland · Martha's Vineyard vs Providence/Warwick · Martha's Vineyard vs Nantucket · Martha's Vineyard vs Hamilton · all head-to-heads