ERA5 almanac comparison — 8 years of real data
Aruba vs Nantucket: weather in July
Essentially a tie in July: Aruba is 22% clear historically, Nantucket is 24% clear (8-year ERA5 average) — within the noise. Avg high 87°F vs 72°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific July. For this
week’s actual forecast, each destination links to its live page below.
Aruba
AW
- Clear days, July
- 22%
- Sample size
- n=248 days
- Avg high
- 87°F
- Early July (1st–15th)
- 18%
- Late July (16th–end)
- 25%
Nantucket
MA
- Clear days, July
- 24%
- Sample size
- n=248 days
- Avg high
- 72°F
- Early July (1st–15th)
- 10%
- Late July (16th–end)
- 37%
Compare Aruba vs Nantucket 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.