ERA5 almanac comparison — 8 years of real data
Cartagena vs Palm Beach: weather in September
Palm Beach edges out Cartagena for sun in September: 6% clear historically versus 1% (8-year ERA5 average, a 5-point gap). Both are viable — Palm Beach is the safer bet.
Cartagena
Colombia
- Clear days, September
- 1%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early September (1st–15th)
- 2%
- Late September (16th–end)
- 0%
- Rain frequency
- 77% of days
Palm Beach
FL
- Clear days, September
- 6%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early September (1st–15th)
- 5%
- Late September (16th–end)
- 8%
- Rain frequency
- 79% of days
Frequently asked
Is Cartagena or Palm Beach warmer in September?
Equally warm by day in September. Cartagena averages highs of 86°F (highs n=240 days); Palm Beach averages highs of 86°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Cartagena or Palm Beach in September?
Days with measurable rain: Cartagena 77%, Palm Beach 79% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Cartagena or Palm Beach?
Palm Beach edges out Cartagena for sun in September: 6% clear historically versus 1% (8-year ERA5 average, a 5-point gap). Both are viable — Palm Beach is the safer bet.
Compare Cartagena vs Palm Beach 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.