ERA5 almanac comparison — 8 years of real data
Cancún vs St. Augustine: weather in March
Cancún edges out St. Augustine for sun in March: 34% clear historically versus 25% (8-year ERA5 average, a 9-point gap). Both are viable — Cancún is the safer bet.
Cancún
Mexico
- Clear days, March
- 34%
- Sample size
- n=248 days
- Avg high
- 83°F
- Early March (1st–15th)
- 29%
- Late March (16th–end)
- 39%
- Rain frequency
- 30% of days
St. Augustine
FL
- Clear days, March
- 25%
- Sample size
- n=248 days
- Avg high
- 72°F
- Early March (1st–15th)
- 22%
- Late March (16th–end)
- 28%
- Rain frequency
- 27% of days
Frequently asked
Is Cancún or St. Augustine warmer in March?
Cancún runs warmer by day in March. Cancún averages highs of 83°F (highs n=248 days); St. Augustine averages highs of 72°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Cancún or St. Augustine in March?
Days with measurable rain: Cancún 30%, St. Augustine 27% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in March, Cancún or St. Augustine?
Cancún edges out St. Augustine for sun in March: 34% clear historically versus 25% (8-year ERA5 average, a 9-point gap). Both are viable — Cancún is the safer bet.
Compare Cancún vs St. Augustine 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.