ERA5 almanac comparison — 8 years of real data
Cartagena vs Costa Rica — Manuel Antonio: weather in April
Essentially a tie in April: Cartagena is 10% clear historically, Costa Rica — Manuel Antonio is 8% clear (8-year ERA5 average) — within the noise. Avg high 90°F vs 86°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific April. For this
week’s actual forecast, each destination links to its live page below.
Cartagena
CO
- Clear days, April
- 10%
- Sample size
- n=240 days
- Avg high
- 90°F
- Early April (1st–15th)
- 12%
- Late April (16th–end)
- 8%
- Rain frequency
- 50% of days
Costa Rica — Manuel Antonio
CR
- Clear days, April
- 8%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early April (1st–15th)
- 14%
- Late April (16th–end)
- 3%
- Rain frequency
- 63% of days
Compare Cartagena vs Costa Rica — Manuel Antonio 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.