ERA5 almanac comparison — 8 years of real data
Antigua vs Belize: weather in December
Antigua edges out Belize for sun in December: 16% clear historically versus 10% (8-year ERA5 average, a 6-point gap). Belize also sees measurably more rain than Antigua this month (78% vs 51% of days). Both are viable — Antigua is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific December. For this
week’s actual forecast, each destination links to its live page below.
Antigua
AG
- Clear days, December
- 16%
- Sample size
- n=248 days
- Avg high
- 82°F
- Early December (1st–15th)
- 8%
- Late December (16th–end)
- 23%
- Rain frequency
- 51% of days
Belize
BZ
- Clear days, December
- 10%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early December (1st–15th)
- 4%
- Late December (16th–end)
- 15%
- Rain frequency
- 78% of days
Compare Antigua vs Belize 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.