ERA5 almanac comparison — 8 years of real data
Las Vegas vs San Antonio: weather in November
Essentially a tie in November: Las Vegas is 34% clear historically, San Antonio is 33% clear (8-year ERA5 average) — within the noise. Avg high 68°F vs 72°F. San Antonio also sees measurably more rain than Las Vegas this month (30% vs 6% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Las Vegas
NV
- Clear days, November
- 34%
- Sample size
- n=240 days
- Avg high
- 68°F
- Early November (1st–15th)
- 57%
- Late November (16th–end)
- 10%
- Rain frequency
- 6% of days
San Antonio
TX
- Clear days, November
- 33%
- Sample size
- n=240 days
- Avg high
- 72°F
- Early November (1st–15th)
- 39%
- Late November (16th–end)
- 27%
- Rain frequency
- 30% of days
Compare Las Vegas vs San 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.