ERA5 almanac comparison — 8 years of real data
Denver vs Sarasota: weather in September
Denver is the clear winner for sun in September: 74% of days historically clear versus just 11% in Sarasota — a 63-point gap across 8 years of ERA5 data. Sarasota also sees measurably more rain than Denver this month (67% vs 15% of days). This isn't close.
Denver
CO
- Clear days, September
- 74%
- Sample size
- n=240 days
- Avg high
- 84°F
- Early September (1st–15th)
- 70%
- Late September (16th–end)
- 78%
- Rain frequency
- 15% of days
Sarasota
FL
- Clear days, September
- 11%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early September (1st–15th)
- 6%
- Late September (16th–end)
- 16%
- Rain frequency
- 67% of days
Frequently asked
Is Denver or Sarasota warmer in September?
Sarasota runs warmer by day in September. Denver averages highs of 84°F (highs n=240 days); Sarasota averages highs of 86°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Denver or Sarasota in September?
Sarasota is measurably wetter than Denver. Days with measurable rain: Denver 15%, Sarasota 67% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Denver or Sarasota?
Denver is the clear winner for sun in September: 74% of days historically clear versus just 11% in Sarasota — a 63-point gap across 8 years of ERA5 data. Sarasota also sees measurably more rain than Denver this month (67% vs 15% of days). This isn't close.
Compare Denver vs Sarasota 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.