ERA5 almanac comparison — 8 years of real data
Dallas vs Sea Island: weather in October
Dallas edges out Sea Island for sun in October: 49% clear historically versus 42% (8-year ERA5 average, a 7-point gap). Both are viable — Dallas is the safer bet.
Dallas
TX
- Clear days, October
- 49%
- Sample size
- n=248 days
- Avg high
- 80°F
- Early October (1st–15th)
- 66%
- Late October (16th–end)
- 34%
- Rain frequency
- 26% of days
Sea Island
GA
- Clear days, October
- 42%
- Sample size
- n=248 days
- Avg high
- 77°F
- Early October (1st–15th)
- 40%
- Late October (16th–end)
- 44%
- Rain frequency
- 30% of days
Frequently asked
Is Dallas or Sea Island warmer in October?
Dallas runs warmer by day in October. Dallas averages highs of 80°F (highs n=248 days); Sea Island averages highs of 77°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Dallas or Sea Island in October?
Days with measurable rain: Dallas 26%, Sea Island 30% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Dallas or Sea Island?
Dallas edges out Sea Island for sun in October: 49% clear historically versus 42% (8-year ERA5 average, a 7-point gap). Both are viable — Dallas is the safer bet.
Compare Dallas 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.