ERA5 almanac comparison — 8 years of real data
Hilton Head vs Hudson Valley: weather in April
Hilton Head is the clear winner for sun in April: 38% of days historically clear versus just 4% in Hudson Valley — a 34-point gap across 8 years of ERA5 data. This isn't close.
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
Hudson Valley
NY
- Clear days, April
- 4%
- Sample size
- n=240 days
- Avg high
- 59°F
- Early April (1st–15th)
- 5%
- Late April (16th–end)
- 3%
- Rain frequency
- 42% of days
Frequently asked
Is Hilton Head or Hudson Valley warmer in April?
Hilton Head runs warmer by day in April. Hilton Head averages highs of 74°F (highs n=240 days); Hudson Valley averages highs of 59°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Hilton Head or Hudson Valley in April?
Days with measurable rain: Hilton Head 28%, Hudson Valley 42% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in April, Hilton Head or Hudson Valley?
Hilton Head is the clear winner for sun in April: 38% of days historically clear versus just 4% in Hudson Valley — a 34-point gap across 8 years of ERA5 data. This isn't close.
Compare Hilton Head vs Hudson Valley 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.