ERA5 almanac comparison — 8 years of real data
Hilton Head vs Puerto Vallarta: weather in April
Puerto Vallarta is the clear winner for sun in April: 99% of days historically clear versus just 38% in Hilton Head — a 61-point gap across 8 years of ERA5 data. Hilton Head also sees measurably more rain than Puerto Vallarta this month (28% vs 0% 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 April. For this
week’s actual forecast, each destination links to its live page below.
Hilton Head
SC
- Clear days, April
- 38%
- Sample size
- n=240 days
- Avg high
- 74°F
- Early April (1st–15th)
- 31%
- Late April (16th–end)
- 44%
- Rain frequency
- 28% of days
Puerto Vallarta
MX
- Clear days, April
- 99%
- Sample size
- n=240 days
- Avg high
- 81°F
- Early April (1st–15th)
- 100%
- Late April (16th–end)
- 98%
- Rain frequency
- 0% of days
Compare Hilton Head 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 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.