ERA5 almanac comparison — 8 years of real data
Charleston vs Hilton Head: weather in June
Essentially a tie in June: Charleston is 22% clear historically, Hilton Head is 20% clear (8-year ERA5 average) — within the noise. Avg high 85°F vs 86°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Charleston
SC
- Clear days, June
- 22%
- Sample size
- n=240 days
- Avg high
- 85°F
- Early June (1st–15th)
- 20%
- Late June (16th–end)
- 23%
- Rain frequency
- 54% of days
Hilton Head
SC
- Clear days, June
- 20%
- Sample size
- n=240 days
- Avg high
- 86°F
- Early June (1st–15th)
- 17%
- Late June (16th–end)
- 24%
- Rain frequency
- 52% of days
Frequently asked
Is Charleston or Hilton Head warmer in June?
Hilton Head runs warmer by day in June. Charleston averages highs of 85°F (highs n=240 days); Hilton Head averages highs of 86°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Charleston or Hilton Head in June?
Days with measurable rain: Charleston 54%, Hilton Head 52% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in June, Charleston or Hilton Head?
Essentially a tie in June: Charleston is 22% clear historically, Hilton Head is 20% clear (8-year ERA5 average) — within the noise. Avg high 85°F vs 86°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Charleston 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.