ERA5 almanac comparison — 8 years of real data
Hilton Head vs Hudson Valley: weather in January
Essentially a tie in January: Hilton Head is 0% clear historically, Hudson Valley is 0% clear (8-year ERA5 average) — within the noise. Avg high 58°F vs 37°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Hilton Head
SC
- Clear days, January
- 0%
- Sample size
- n=248 days
- Avg high
- 58°F
- Early January (1st–15th)
- 1%
- Late January (16th–end)
- 0%
- Rain frequency
- 27% of days
Hudson Valley
NY
- Clear days, January
- 0%
- Sample size
- n=248 days
- Avg high
- 37°F
- Early January (1st–15th)
- 0%
- Late January (16th–end)
- 0%
- Rain frequency
- 30% of days
Frequently asked
Is Hilton Head or Hudson Valley warmer in January?
Hilton Head runs warmer by day in January. Hilton Head averages highs of 58°F (highs n=248 days); Hudson Valley averages highs of 37°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Hilton Head or Hudson Valley in January?
Days with measurable rain: Hilton Head 27%, Hudson Valley 30% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in January, Hilton Head or Hudson Valley?
Essentially a tie in January: Hilton Head is 0% clear historically, Hudson Valley is 0% clear (8-year ERA5 average) — within the noise. Avg high 58°F vs 37°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
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.