ERA5 almanac comparison — 8 years of real data
Puerto Vallarta vs Savannah: weather in December
Puerto Vallarta is the clear winner for sun in December: 85% of days historically clear versus just 8% in Savannah — a 77-point gap across 8 years of ERA5 data. Savannah also sees measurably more rain than Puerto Vallarta this month (27% vs 5% of days). This isn't close.
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.
Puerto Vallarta
MX
- Clear days, December
- 85%
- Sample size
- n=248 days
- Avg high
- 81°F
- Early December (1st–15th)
- 85%
- Late December (16th–end)
- 85%
- Rain frequency
- 5% of days
Savannah
GA
- Clear days, December
- 8%
- Sample size
- n=248 days
- Avg high
- 63°F
- Early December (1st–15th)
- 7%
- Late December (16th–end)
- 9%
- Rain frequency
- 27% of days
Compare Puerto Vallarta vs Savannah 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.