ERA5 almanac comparison — 8 years of real data
Cartagena vs Palm Beach: weather in May
Palm Beach edges out Cartagena for sun in May: 20% clear historically versus 5% (8-year ERA5 average, a 15-point gap). Cartagena also sees measurably more rain than Palm Beach this month (72% vs 55% of days). Both are viable — Palm Beach is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific May. For this
week’s actual forecast, each destination links to its live page below.
Cartagena
CO
- Clear days, May
- 5%
- Sample size
- n=248 days
- Avg high
- 87°F
- Early May (1st–15th)
- 8%
- Late May (16th–end)
- 2%
- Rain frequency
- 72% of days
Palm Beach
FL
- Clear days, May
- 20%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early May (1st–15th)
- 26%
- Late May (16th–end)
- 15%
- Rain frequency
- 55% of days
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 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.