ERA5 almanac comparison — 8 years of real data
Charlotte vs Sea Island: weather in March
Essentially a tie in March: Charlotte is 11% clear historically, Sea Island is 15% clear (8-year ERA5 average) — within the noise. Avg high 64°F vs 69°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Charlotte
NC
- Clear days, March
- 11%
- Sample size
- n=248 days
- Avg high
- 64°F
- Early March (1st–15th)
- 8%
- Late March (16th–end)
- 13%
- Rain frequency
- 34% of days
Sea Island
GA
- Clear days, March
- 15%
- Sample size
- n=248 days
- Avg high
- 69°F
- Early March (1st–15th)
- 12%
- Late March (16th–end)
- 17%
- Rain frequency
- 29% of days
Frequently asked
Is Charlotte or Sea Island warmer in March?
Sea Island runs warmer by day in March. Charlotte averages highs of 64°F (highs n=248 days); Sea Island averages highs of 69°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Charlotte or Sea Island in March?
Days with measurable rain: Charlotte 34%, Sea Island 29% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Charlotte or Sea Island?
Essentially a tie in March: Charlotte is 11% clear historically, Sea Island is 15% clear (8-year ERA5 average) — within the noise. Avg high 64°F vs 69°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Compare Charlotte vs Sea Island 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.