ERA5 almanac comparison — 8 years of real data

Kiawah Island vs Punta Mita: weather in August

Essentially a tie in August: Kiawah Island is 10% clear historically, Punta Mita is 6% clear (8-year ERA5 average) — within the noise. Avg high 85°F vs 87°F. Punta Mita also sees measurably more rain than Kiawah Island this month (82% vs 64% of days). 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 August. For this week’s actual forecast, each destination links to its live page below.

Kiawah Island

Clear days, August: 10%
Sample size: n=248 days
Avg high: 85°F
Early August (1st–15th): 8%
Late August (16th–end): 12%
Rain frequency: 64% of days

Punta Mita

Clear days, August: 6%
Sample size: n=248 days
Avg high: 87°F
Early August (1st–15th): 7%
Late August (16th–end): 6%
Rain frequency: 82% of days

Compare Kiawah Island vs Punta Mita 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.