ERA5 almanac comparison — 8 years of real data
Cancún vs Kiawah Island: weather in June
Kiawah Island edges out Cancún for sun in June: 22% clear historically versus 10% (8-year ERA5 average, a 12-point gap). Both are viable — Kiawah Island is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific June. For this
week’s actual forecast, each destination links to its live page below.
Cancún
MX
- Clear days, June
- 10%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early June (1st–15th)
- 11%
- Late June (16th–end)
- 8%
- Rain frequency
- 62% of days
Kiawah Island
SC
- Clear days, June
- 22%
- Sample size
- n=240 days
- Avg high
- 84°F
- Early June (1st–15th)
- 21%
- Late June (16th–end)
- 22%
- Rain frequency
- 54% of days
Compare Cancún vs Kiawah Island 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.