ERA5 almanac comparison — 8 years of real data
Cayman Islands vs Hilton Head: weather in March
Essentially a tie in March: Cayman Islands is 17% clear historically, Hilton Head is 19% clear (8-year ERA5 average) — within the noise. Avg high 83°F vs 69°F. Cayman Islands also sees measurably more rain than Hilton Head this month (60% vs 30% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Cayman Islands
Cayman Islands
- Clear days, March
- 17%
- Sample size
- n=248 days
- Avg high
- 83°F
- Early March (1st–15th)
- 11%
- Late March (16th–end)
- 22%
- Rain frequency
- 60% of days
Hilton Head
SC
- Clear days, March
- 19%
- Sample size
- n=248 days
- Avg high
- 69°F
- Early March (1st–15th)
- 18%
- Late March (16th–end)
- 20%
- Rain frequency
- 30% of days
Frequently asked
Is Cayman Islands or Hilton Head warmer in March?
Cayman Islands runs warmer by day in March. Cayman Islands averages highs of 83°F (highs n=248 days); Hilton Head averages highs of 69°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Cayman Islands or Hilton Head in March?
Cayman Islands is measurably wetter than Hilton Head. Days with measurable rain: Cayman Islands 60%, Hilton Head 30% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Cayman Islands or Hilton Head?
Essentially a tie in March: Cayman Islands is 17% clear historically, Hilton Head is 19% clear (8-year ERA5 average) — within the noise. Avg high 83°F vs 69°F. Cayman Islands also sees measurably more rain than Hilton Head this month (60% vs 30% of days). Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Cayman Islands 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.