ERA5 almanac comparison — 8 years of real data
Park City vs San Antonio: weather in August
Essentially a tie in August: Park City is 41% clear historically, San Antonio is 45% clear (8-year ERA5 average) — within the noise. Avg high 78°F vs 97°F. Park City also sees measurably more rain than San Antonio this month (39% vs 24% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Park City
UT
- Clear days, August
- 41%
- Sample size
- n=248 days
- Avg high
- 78°F
- Early August (1st–15th)
- 42%
- Late August (16th–end)
- 41%
- Rain frequency
- 39% of days
San Antonio
TX
- Clear days, August
- 45%
- Sample size
- n=248 days
- Avg high
- 97°F
- Early August (1st–15th)
- 51%
- Late August (16th–end)
- 39%
- Rain frequency
- 24% of days
Compare Park City 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.