ERA5 almanac comparison — 8 years of real data
Fort Lauderdale vs Key West: weather in December
Key West edges out Fort Lauderdale for sun in December: 41% clear historically versus 27% (8-year ERA5 average, a 14-point gap). Both are viable — Key West is the safer bet.
Fort Lauderdale
FL
- Clear days, December
- 27%
- Sample size
- n=248 days
- Avg high
- 77°F
- Early December (1st–15th)
- 33%
- Late December (16th–end)
- 22%
- Rain frequency
- 39% of days
Key West
FL
- Clear days, December
- 41%
- Sample size
- n=248 days
- Avg high
- 75°F
- Early December (1st–15th)
- 48%
- Late December (16th–end)
- 35%
- Rain frequency
- 26% of days
Frequently asked
Is Fort Lauderdale or Key West warmer in December?
Fort Lauderdale runs warmer by day in December. Fort Lauderdale averages highs of 77°F (highs n=248 days); Key West averages highs of 75°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Fort Lauderdale or Key West in December?
Days with measurable rain: Fort Lauderdale 39%, Key West 26% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Fort Lauderdale or Key West?
Key West edges out Fort Lauderdale for sun in December: 41% clear historically versus 27% (8-year ERA5 average, a 14-point gap). Both are viable — Key West is the safer bet.
Compare Fort Lauderdale vs Key West 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.