ERA5 almanac comparison — 8 years of real data
Barbados vs St. Martin: weather in March
St. Martin edges out Barbados for sun in March: 28% clear historically versus 16% (8-year ERA5 average, a 12-point gap). Barbados also sees measurably more rain than St. Martin this month (47% vs 26% of days). Both are viable — St. Martin is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific March. For this
week’s actual forecast, each destination links to its live page below.
Barbados
BB
- Clear days, March
- 16%
- Sample size
- n=248 days
- Avg high
- 81°F
- Early March (1st–15th)
- 17%
- Late March (16th–end)
- 16%
- Rain frequency
- 47% of days
St. Martin
SX
- Clear days, March
- 28%
- Sample size
- n=248 days
- Avg high
- 75°F
- Early March (1st–15th)
- 34%
- Late March (16th–end)
- 23%
- Rain frequency
- 26% of days
Compare Barbados vs St. Martin 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 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.