ERA5 almanac comparison — 8 years of real data
Aruba vs Charleston: weather in January
Aruba edges out Charleston for sun in January: 24% clear historically versus 1% (8-year ERA5 average, a 23-point gap). Aruba also sees measurably more rain than Charleston this month (47% vs 31% of days). Both are viable — Aruba is the safer bet.
Aruba
Aruba
- Clear days, January
- 24%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early January (1st–15th)
- 22%
- Late January (16th–end)
- 25%
- Rain frequency
- 47% of days
Charleston
SC
- Clear days, January
- 1%
- Sample size
- n=248 days
- Avg high
- 57°F
- Early January (1st–15th)
- 2%
- Late January (16th–end)
- 0%
- Rain frequency
- 31% of days
Frequently asked
Is Aruba or Charleston warmer in January?
Aruba runs warmer by day in January. Aruba averages highs of 84°F (highs n=248 days); Charleston averages highs of 57°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Aruba or Charleston in January?
Aruba is measurably wetter than Charleston. Days with measurable rain: Aruba 47%, Charleston 31% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in January, Aruba or Charleston?
Aruba edges out Charleston for sun in January: 24% clear historically versus 1% (8-year ERA5 average, a 23-point gap). Aruba also sees measurably more rain than Charleston this month (47% vs 31% of days). Both are viable — Aruba is the safer bet.
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.