ERA5 almanac comparison — 8 years of real data
Hudson Valley vs Nassau: weather in October
Essentially a tie in October: Hudson Valley is 11% clear historically, Nassau is 14% clear (8-year ERA5 average) — within the noise. Avg high 64°F vs 84°F. Nassau also sees measurably more rain than Hudson Valley this month (59% vs 31% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Hudson Valley
NY
- Clear days, October
- 11%
- Sample size
- n=248 days
- Avg high
- 64°F
- Early October (1st–15th)
- 18%
- Late October (16th–end)
- 5%
- Rain frequency
- 31% of days
Nassau
BS
- Clear days, October
- 14%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early October (1st–15th)
- 8%
- Late October (16th–end)
- 20%
- Rain frequency
- 59% of days
Compare Hudson Valley vs Nassau 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.