ERA5 almanac comparison — 8 years of real data
Big Sur vs Telluride: weather in September
Big Sur edges out Telluride for sun in September: 35% clear historically versus 11% (8-year ERA5 average, a 24-point gap). Telluride also sees measurably more rain than Big Sur this month (32% vs 4% of days). Both are viable — Big Sur is the safer bet.
Big Sur
CA
- Clear days, September
- 35%
- Sample size
- n=240 days
- Avg high
- 72°F
- Early September (1st–15th)
- 40%
- Late September (16th–end)
- 30%
- Rain frequency
- 4% of days
Telluride
CO
- Clear days, September
- 11%
- Sample size
- n=240 days
- Avg high
- 66°F
- Early September (1st–15th)
- 20%
- Late September (16th–end)
- 2%
- Rain frequency
- 32% of days
Frequently asked
Is Big Sur or Telluride warmer in September?
Big Sur runs warmer by day in September. Big Sur averages highs of 72°F (highs n=240 days); Telluride averages highs of 66°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Big Sur or Telluride in September?
Telluride is measurably wetter than Big Sur. Days with measurable rain: Big Sur 4%, Telluride 32% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Big Sur or Telluride?
Big Sur edges out Telluride for sun in September: 35% clear historically versus 11% (8-year ERA5 average, a 24-point gap). Telluride also sees measurably more rain than Big Sur this month (32% vs 4% of days). Both are viable — Big Sur is the safer bet.
Compare Big Sur vs Telluride 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 forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.