ERA5 almanac comparison — 8 years of real data
30A / Seaside vs Naples: weather in January
Naples is the clear winner for sun in January: 35% of days historically clear versus just 1% in 30A / Seaside — a 34-point gap across 8 years of ERA5 data. This isn't close.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific January. For this
week’s actual forecast, each destination links to its live page below.
30A / Seaside
FL
- Clear days, January
- 1%
- Sample size
- n=248 days
- Avg high
- 61°F
- Early January (1st–15th)
- 2%
- Late January (16th–end)
- 1%
- Rain frequency
- 35% of days
Naples
FL
- Clear days, January
- 35%
- Sample size
- n=248 days
- Avg high
- 73°F
- Early January (1st–15th)
- 32%
- Late January (16th–end)
- 37%
- Rain frequency
- 25% of days
Compare 30A / Seaside vs Naples 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.