ERA5 almanac comparison — 8 years of real data
Hilton Head vs Hudson Valley: weather in October
Hilton Head is the clear winner for sun in October: 45% of days historically clear versus just 11% in Hudson Valley — a 34-point gap across 8 years of ERA5 data. This isn't close.
Hilton Head
SC
- Clear days, October
- 45%
- Sample size
- n=248 days
- Avg high
- 77°F
- Early October (1st–15th)
- 49%
- Late October (16th–end)
- 41%
- Rain frequency
- 24% of days
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
Frequently asked
Is Hilton Head or Hudson Valley warmer in October?
Hilton Head runs warmer by day in October. Hilton Head averages highs of 77°F (highs n=248 days); Hudson Valley averages highs of 64°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Hilton Head or Hudson Valley in October?
Days with measurable rain: Hilton Head 24%, Hudson Valley 31% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Hilton Head or Hudson Valley?
Hilton Head is the clear winner for sun in October: 45% of days historically clear versus just 11% in Hudson Valley — a 34-point gap across 8 years of ERA5 data. This isn't close.
Compare Hilton Head vs Hudson Valley 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.