ERA5 almanac comparison — 8 years of real data
Mexico City vs Tampa: weather in September
Tampa edges out Mexico City for sun in September: 12% clear historically versus 4% (8-year ERA5 average, a 8-point gap). Mexico City also sees measurably more rain than Tampa this month (84% vs 67% of days). Both are viable — Tampa is the safer bet.
Mexico City
Mexico
- Clear days, September
- 4%
- Sample size
- n=240 days
- Avg high
- 73°F
- Early September (1st–15th)
- 2%
- Late September (16th–end)
- 6%
- Rain frequency
- 84% of days
Tampa
FL
- Clear days, September
- 12%
- Sample size
- n=240 days
- Avg high
- 87°F
- Early September (1st–15th)
- 6%
- Late September (16th–end)
- 18%
- Rain frequency
- 67% of days
Frequently asked
Is Mexico City or Tampa warmer in September?
Tampa runs warmer by day in September. Mexico City averages highs of 73°F (highs n=240 days); Tampa averages highs of 87°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Mexico City or Tampa in September?
Mexico City is measurably wetter than Tampa. Days with measurable rain: Mexico City 84%, Tampa 67% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Mexico City or Tampa?
Tampa edges out Mexico City for sun in September: 12% clear historically versus 4% (8-year ERA5 average, a 8-point gap). Mexico City also sees measurably more rain than Tampa this month (84% vs 67% of days). Both are viable — Tampa is the safer bet.
Compare Mexico City vs Tampa 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.