ERA5 almanac comparison — 8 years of real data
Outer Banks vs St. Barthélemy: weather in December
St. Barthélemy edges out Outer Banks for sun in December: 18% clear historically versus 0% (8-year ERA5 average, a 18-point gap). Both are viable — St. Barthélemy is the safer bet.
Outer Banks
NC
- Clear days, December
- 0%
- Sample size
- n=248 days
- Avg high
- 57°F
- Early December (1st–15th)
- 0%
- Late December (16th–end)
- 0%
- Rain frequency
- 27% of days
St. Barthélemy
St Barthelemy
- Clear days, December
- 18%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early December (1st–15th)
- 10%
- Late December (16th–end)
- 25%
- Rain frequency
- 41% of days
Frequently asked
Is Outer Banks or St. Barthélemy warmer in December?
St. Barthélemy runs warmer by day in December. Outer Banks averages highs of 57°F (highs n=248 days); St. Barthélemy averages highs of 80°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Outer Banks or St. Barthélemy in December?
Days with measurable rain: Outer Banks 27%, St. Barthélemy 41% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Outer Banks or St. Barthélemy?
St. Barthélemy edges out Outer Banks for sun in December: 18% clear historically versus 0% (8-year ERA5 average, a 18-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.