ERA5 almanac comparison — 8 years of real data
San Antonio vs Sea Island: weather in July
San Antonio is the clear winner for sun in July: 44% of days historically clear versus just 14% in Sea Island — a 30-point gap across 8 years of ERA5 data. Sea Island also sees measurably more rain than San Antonio this month (64% vs 29% of days). This isn't close.
San Antonio
TX
- Clear days, July
- 44%
- Sample size
- n=248 days
- Avg high
- 95°F
- Early July (1st–15th)
- 38%
- Late July (16th–end)
- 50%
- Rain frequency
- 29% 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 San Antonio or Sea Island warmer in July?
San Antonio runs warmer by day in July. San Antonio averages highs of 95°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 San Antonio or Sea Island in July?
Sea Island is measurably wetter than San Antonio. Days with measurable rain: San Antonio 29%, Sea Island 64% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in July, San Antonio or Sea Island?
San Antonio is the clear winner for sun in July: 44% of days historically clear versus just 14% in Sea Island — a 30-point gap across 8 years of ERA5 data. Sea Island also sees measurably more rain than San Antonio this month (64% vs 29% of days). This isn't close.
Compare San Antonio 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.