ERA5 almanac comparison — 8 years of real data
Jacksonville vs San Antonio: weather in October
San Antonio edges out Jacksonville for sun in October: 49% clear historically versus 33% (8-year ERA5 average, a 16-point gap). Both are viable — San Antonio is the safer bet.
Jacksonville
FL
- Clear days, October
- 33%
- Sample size
- n=248 days
- Avg high
- 79°F
- Early October (1st–15th)
- 28%
- Late October (16th–end)
- 37%
- Rain frequency
- 30% of days
San Antonio
TX
- Clear days, October
- 49%
- Sample size
- n=248 days
- Avg high
- 84°F
- Early October (1st–15th)
- 58%
- Late October (16th–end)
- 40%
- Rain frequency
- 26% of days
Frequently asked
Is Jacksonville or San Antonio warmer in October?
San Antonio runs warmer by day in October. Jacksonville averages highs of 79°F (highs n=248 days); San Antonio averages highs of 84°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Jacksonville or San Antonio in October?
Days with measurable rain: Jacksonville 30%, San Antonio 26% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in October, Jacksonville or San Antonio?
San Antonio edges out Jacksonville for sun in October: 49% clear historically versus 33% (8-year ERA5 average, a 16-point gap). Both are viable — San Antonio is the safer bet.
Compare Jacksonville vs San Antonio 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.