ERA5 almanac comparison — 8 years of real data
30A / Seaside vs Sea Island: weather in July
Sea Island edges out 30A / Seaside for sun in July: 14% clear historically versus 9% (8-year ERA5 average, a 5-point gap). Both are viable — Sea Island is the safer bet.
30A / Seaside
FL
- Clear days, July
- 9%
- Sample size
- n=248 days
- Avg high
- 86°F
- Early July (1st–15th)
- 10%
- Late July (16th–end)
- 8%
- Rain frequency
- 75% of days
Sea Island
GA
- Clear days, July
- 14%
- Sample size
- n=248 days
- Avg high
- 87°F
- Early July (1st–15th)
- 12%
- Late July (16th–end)
- 16%
- Rain frequency
- 64% of days
Frequently asked
Is 30A / Seaside or Sea Island warmer in July?
Sea Island runs warmer by day in July. 30A / Seaside averages highs of 86°F (highs n=248 days); Sea Island averages highs of 87°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in 30A / Seaside or Sea Island in July?
Days with measurable rain: 30A / Seaside 75%, Sea Island 64% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in July, 30A / Seaside or Sea Island?
Sea Island edges out 30A / Seaside for sun in July: 14% clear historically versus 9% (8-year ERA5 average, a 5-point gap). Both are viable — Sea Island is the safer bet.
Compare 30A / Seaside 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.