ERA5 almanac comparison — 8 years of real data
Oaxaca vs San Francisco: weather in June
Essentially a tie in June: Oaxaca is 16% clear historically, San Francisco is 14% clear (8-year ERA5 average) — within the noise. Avg high 80°F vs 66°F. Oaxaca also sees measurably more rain than San Francisco this month (68% vs 1% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Oaxaca
MX
- Clear days, June
- 16%
- Sample size
- n=240 days
- Avg high
- 80°F
- Early June (1st–15th)
- 20%
- Late June (16th–end)
- 12%
- Rain frequency
- 68% of days
San Francisco
CA
- Clear days, June
- 14%
- Sample size
- n=240 days
- Avg high
- 66°F
- Early June (1st–15th)
- 18%
- Late June (16th–end)
- 10%
- Rain frequency
- 1% of days
Compare Oaxaca vs San Francisco 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.