ERA5 almanac comparison — 8 years of real data
Los Cabos vs Puerto Vallarta: weather in December
Essentially a tie in December: Los Cabos is 89% clear historically, Puerto Vallarta is 85% clear (8-year ERA5 average) — within the noise. Avg high 80°F vs 81°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Los Cabos
Mexico
- Clear days, December
- 89%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early December (1st–15th)
- 90%
- Late December (16th–end)
- 89%
- Rain frequency
- 3% of days
Puerto Vallarta
Mexico
- 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
Frequently asked
Is Los Cabos or Puerto Vallarta warmer in December?
Puerto Vallarta runs warmer by day in December. Los Cabos averages highs of 80°F (highs n=248 days); Puerto Vallarta averages highs of 81°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Los Cabos or Puerto Vallarta in December?
Days with measurable rain: Los Cabos 3%, Puerto Vallarta 5% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Los Cabos or Puerto Vallarta?
Essentially a tie in December: Los Cabos is 89% clear historically, Puerto Vallarta is 85% clear (8-year ERA5 average) — within the noise. Avg high 80°F vs 81°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Los Cabos vs Puerto Vallarta 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 forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.