ERA5 almanac comparison — 8 years of real data
Naples vs St. Augustine: weather in December
Naples is the clear winner for sun in December: 45% of days historically clear versus just 13% in St. Augustine — a 32-point gap across 8 years of ERA5 data. This isn't close.
Naples
FL
- Clear days, December
- 45%
- Sample size
- n=248 days
- Avg high
- 77°F
- Early December (1st–15th)
- 53%
- Late December (16th–end)
- 38%
- Rain frequency
- 21% of days
St. Augustine
FL
- Clear days, December
- 13%
- Sample size
- n=248 days
- Avg high
- 67°F
- Early December (1st–15th)
- 13%
- Late December (16th–end)
- 13%
- Rain frequency
- 25% of days
Frequently asked
Is Naples or St. Augustine warmer in December?
Naples runs warmer by day in December. Naples averages highs of 77°F (highs n=248 days); St. Augustine averages highs of 67°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Naples or St. Augustine in December?
Days with measurable rain: Naples 21%, St. Augustine 25% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Naples or St. Augustine?
Naples is the clear winner for sun in December: 45% of days historically clear versus just 13% in St. Augustine — a 32-point gap across 8 years of ERA5 data. This isn't close.
Compare Naples vs St. Augustine 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.