ERA5 almanac comparison — 8 years of real data
Martha's Vineyard vs Savannah: weather in May
Savannah is the clear winner for sun in May: 37% of days historically clear versus just 3% in Martha's Vineyard — a 34-point gap across 8 years of ERA5 data. This isn't close.
Martha's Vineyard
MA
- Clear days, May
- 3%
- Sample size
- n=248 days
- Avg high
- 62°F
- Early May (1st–15th)
- 1%
- Late May (16th–end)
- 4%
- Rain frequency
- 35% of days
Savannah
GA
- Clear days, May
- 37%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early May (1st–15th)
- 42%
- Late May (16th–end)
- 32%
- Rain frequency
- 41% of days
Frequently asked
Is Martha's Vineyard or Savannah warmer in May?
Savannah runs warmer by day in May. Martha's Vineyard averages highs of 62°F (highs n=248 days); Savannah averages highs of 84°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Martha's Vineyard or Savannah in May?
Days with measurable rain: Martha's Vineyard 35%, Savannah 41% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in May, Martha's Vineyard or Savannah?
Savannah is the clear winner for sun in May: 37% of days historically clear versus just 3% in Martha's Vineyard — a 34-point gap across 8 years of ERA5 data. This isn't close.
Compare Martha's Vineyard vs Savannah in another month
All percentages are historical averages from the ERA5 reanalysis via Open-Meteo, 8 full years (2018–2025). “Clear” means avg high ≥ 72 °F, precipitation < 1 mm, and a non-precipitation weather code. This is history, not a forecast. The live forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.