ERA5 almanac comparison — 8 years of real data
Belize vs Cayman Islands: weather in August
Essentially a tie in August: Belize is 0% clear historically, Cayman Islands is 4% clear (8-year ERA5 average) — within the noise. Avg high 86°F vs 88°F. Belize also sees measurably more rain than Cayman Islands this month (93% vs 59% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Belize
BZ
- Clear days, August
- 0%
- Sample size
- n=248 days
- Avg high
- 86°F
- Early August (1st–15th)
- 0%
- Late August (16th–end)
- 0%
- Rain frequency
- 93% of days
Cayman Islands
KY
- Clear days, August
- 4%
- Sample size
- n=248 days
- Avg high
- 88°F
- Early August (1st–15th)
- 3%
- Late August (16th–end)
- 4%
- Rain frequency
- 59% of days
Compare Belize vs Cayman Islands 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.