ERA5 almanac comparison — 8 years of real data
Fort Lauderdale vs Jacksonville: weather in September
Jacksonville edges out Fort Lauderdale for sun in September: 22% clear historically versus 6% (8-year ERA5 average, a 16-point gap). Fort Lauderdale also sees measurably more rain than Jacksonville this month (80% vs 58% of days). Both are viable — Jacksonville is the safer bet.
Fort Lauderdale
FL
- Clear days, September
- 6%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early September (1st–15th)
- 3%
- Late September (16th–end)
- 8%
- Rain frequency
- 80% of days
Jacksonville
FL
- Clear days, September
- 22%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early September (1st–15th)
- 17%
- Late September (16th–end)
- 27%
- Rain frequency
- 58% of days
Frequently asked
Is Fort Lauderdale or Jacksonville warmer in September?
Equally warm by day in September. Fort Lauderdale averages highs of 86°F (highs n=240 days); Jacksonville averages highs of 86°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Fort Lauderdale or Jacksonville in September?
Fort Lauderdale is measurably wetter than Jacksonville. Days with measurable rain: Fort Lauderdale 80%, Jacksonville 58% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Fort Lauderdale or Jacksonville?
Jacksonville edges out Fort Lauderdale for sun in September: 22% clear historically versus 6% (8-year ERA5 average, a 16-point gap). Fort Lauderdale also sees measurably more rain than Jacksonville this month (80% vs 58% of days). Both are viable — Jacksonville is the safer bet.
Compare Fort Lauderdale vs Jacksonville 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.