ERA5 almanac comparison — 8 years of real data
Aspen vs Big Sur: weather in July
Aspen edges out Big Sur for sun in July: 43% clear historically versus 25% (8-year ERA5 average, a 18-point gap). Aspen also sees measurably more rain than Big Sur this month (22% vs 0% of days). Both are viable — Aspen is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific July. For this
week’s actual forecast, each destination links to its live page below.
Aspen
CO
- Clear days, July
- 43%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early July (1st–15th)
- 43%
- Late July (16th–end)
- 43%
- Rain frequency
- 22% of days
Big Sur
CA
- Clear days, July
- 25%
- Sample size
- n=248 days
- Avg high
- 69°F
- Early July (1st–15th)
- 29%
- Late July (16th–end)
- 22%
- Rain frequency
- 0% of days
Compare Aspen vs Big Sur 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.