ERA5 almanac comparison — 8 years of real data
Jacksonville vs San Antonio: weather in March
Essentially a tie in March: Jacksonville is 37% clear historically, San Antonio is 33% clear (8-year ERA5 average) — within the noise. Avg high 75°F vs 78°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
Jacksonville
FL
- Clear days, March
- 37%
- Sample size
- n=248 days
- Avg high
- 75°F
- Early March (1st–15th)
- 35%
- Late March (16th–end)
- 38%
- Rain frequency
- 26% of days
San Antonio
TX
- Clear days, March
- 33%
- Sample size
- n=248 days
- Avg high
- 78°F
- Early March (1st–15th)
- 32%
- Late March (16th–end)
- 33%
- Rain frequency
- 32% of days
Frequently asked
Is Jacksonville or San Antonio warmer in March?
San Antonio runs warmer by day in March. Jacksonville averages highs of 75°F (highs n=248 days); San Antonio averages highs of 78°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Jacksonville or San Antonio in March?
Days with measurable rain: Jacksonville 26%, San Antonio 32% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Jacksonville or San Antonio?
Essentially a tie in March: Jacksonville is 37% clear historically, San Antonio is 33% clear (8-year ERA5 average) — within the noise. Avg high 75°F vs 78°F. Pick based on flight time or price, not weather — the weather won't decide this one for you.
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.