ERA5 almanac comparison — 8 years of real data
Atlanta vs Hilton Head: weather in May
Hilton Head edges out Atlanta for sun in May: 39% clear historically versus 32% (8-year ERA5 average, a 7-point gap). Both are viable — Hilton Head is the safer bet.
Atlanta
GA
- Clear days, May
- 32%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early May (1st–15th)
- 26%
- Late May (16th–end)
- 37%
- Rain frequency
- 43% of days
Hilton Head
SC
- Clear days, May
- 39%
- Sample size
- n=248 days
- Avg high
- 81°F
- Early May (1st–15th)
- 44%
- Late May (16th–end)
- 35%
- Rain frequency
- 39% of days
Frequently asked
Is Atlanta or Hilton Head warmer in May?
Hilton Head runs warmer by day in May. Atlanta averages highs of 80°F (highs n=248 days); Hilton Head averages highs of 81°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Atlanta or Hilton Head in May?
Days with measurable rain: Atlanta 43%, Hilton Head 39% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in May, Atlanta or Hilton Head?
Hilton Head edges out Atlanta for sun in May: 39% clear historically versus 32% (8-year ERA5 average, a 7-point gap). Both are viable — Hilton Head is the safer bet.
Compare Atlanta vs Hilton Head 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.