ERA5 almanac comparison — 8 years of real data
Bar Harbor vs Hilton Head: weather in October
Hilton Head is the clear winner for sun in October: 45% of days historically clear versus just 2% in Bar Harbor — a 43-point gap across 8 years of ERA5 data. This isn't close.
Bar Harbor
ME
- Clear days, October
- 2%
- Sample size
- n=248 days
- Avg high
- 58°F
- Early October (1st–15th)
- 4%
- Late October (16th–end)
- 0%
- Rain frequency
- 34% of days
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
Frequently asked
Is Bar Harbor or Hilton Head warmer in October?
Hilton Head runs warmer by day in October. Bar Harbor averages highs of 58°F (highs n=248 days); Hilton Head averages highs of 77°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Bar Harbor or Hilton Head in October?
Days with measurable rain: Bar Harbor 34%, Hilton Head 24% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Bar Harbor or Hilton Head?
Hilton Head is the clear winner for sun in October: 45% of days historically clear versus just 2% in Bar Harbor — a 43-point gap across 8 years of ERA5 data. This isn't close.
Compare Bar Harbor vs Hilton Head 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.