ERA5 almanac comparison — 8 years of real data
Outer Banks vs St. Barthélemy: weather in May
St. Barthélemy edges out Outer Banks for sun in May: 21% clear historically versus 16% (8-year ERA5 average, a 5-point gap). Both are viable — St. Barthélemy is the safer bet.
Outer Banks
NC
- Clear days, May
- 16%
- Sample size
- n=248 days
- Avg high
- 70°F
- Early May (1st–15th)
- 5%
- Late May (16th–end)
- 27%
- Rain frequency
- 35% of days
St. Barthélemy
St Barthelemy
- Clear days, May
- 21%
- Sample size
- n=248 days
- Avg high
- 81°F
- Early May (1st–15th)
- 18%
- Late May (16th–end)
- 24%
- Rain frequency
- 32% of days
Frequently asked
Is Outer Banks or St. Barthélemy warmer in May?
St. Barthélemy runs warmer by day in May. Outer Banks averages highs of 70°F (highs n=248 days); St. Barthélemy averages highs of 81°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Outer Banks or St. Barthélemy in May?
Days with measurable rain: Outer Banks 35%, St. Barthélemy 32% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in May, Outer Banks or St. Barthélemy?
St. Barthélemy edges out Outer Banks for sun in May: 21% clear historically versus 16% (8-year ERA5 average, a 5-point gap). Both are viable — St. Barthélemy is the safer bet.
Compare Outer Banks vs St. Barthélemy 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.