ERA5 almanac comparison — 8 years of real data
Costa Rica — Guanacaste vs Mexico City: weather in November
Mexico City is the clear winner for sun in November: 52% of days historically clear versus just 18% in Costa Rica — Guanacaste — a 34-point gap across 8 years of ERA5 data. Costa Rica — Guanacaste also sees measurably more rain than Mexico City this month (62% vs 11% of days). This isn't close.
Costa Rica — Guanacaste
CR
- Clear days, November
- 18%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early November (1st–15th)
- 10%
- Late November (16th–end)
- 25%
- Rain frequency
- 62% of days
Mexico City
MX
- Clear days, November
- 52%
- Sample size
- n=240 days
- Avg high
- 74°F
- Early November (1st–15th)
- 58%
- Late November (16th–end)
- 47%
- Rain frequency
- 11% of days
Compare Costa Rica — Guanacaste vs Mexico City 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.