ERA5 almanac comparison — 8 years of real data
Aruba vs Charleston: weather in October
Charleston is the clear winner for sun in October: 45% of days historically clear versus just 14% in Aruba — a 31-point gap across 8 years of ERA5 data. This isn't close.
Aruba
Aruba
- Clear days, October
- 14%
- Sample size
- n=248 days
- Avg high
- 88°F
- Early October (1st–15th)
- 17%
- Late October (16th–end)
- 12%
- Rain frequency
- 37% of days
Charleston
SC
- Clear days, October
- 45%
- Sample size
- n=248 days
- Avg high
- 76°F
- Early October (1st–15th)
- 47%
- Late October (16th–end)
- 43%
- Rain frequency
- 24% of days
Frequently asked
Is Aruba or Charleston warmer in October?
Aruba runs warmer by day in October. Aruba averages highs of 88°F (highs n=248 days); Charleston averages highs of 76°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Aruba or Charleston in October?
Days with measurable rain: Aruba 37%, Charleston 24% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Aruba or Charleston?
Charleston is the clear winner for sun in October: 45% of days historically clear versus just 14% in Aruba — a 31-point gap across 8 years of ERA5 data. This isn't close.
Compare Aruba vs Charleston 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.