ERA5 almanac comparison — 8 years of real data
Birmingham vs Miami: weather in December
Miami edges out Birmingham for sun in December: 28% clear historically versus 1% (8-year ERA5 average, a 27-point gap). Both are viable — Miami is the safer bet.
Birmingham
AL
- Clear days, December
- 1%
- Sample size
- n=248 days
- Avg high
- 58°F
- Early December (1st–15th)
- 1%
- Late December (16th–end)
- 1%
- Rain frequency
- 33% of days
Miami
FL
- Clear days, December
- 28%
- Sample size
- n=248 days
- Avg high
- 77°F
- Early December (1st–15th)
- 35%
- Late December (16th–end)
- 21%
- Rain frequency
- 41% of days
Frequently asked
Is Birmingham or Miami warmer in December?
Miami runs warmer by day in December. Birmingham averages highs of 58°F (highs n=248 days); Miami averages highs of 77°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Birmingham or Miami in December?
Days with measurable rain: Birmingham 33%, Miami 41% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Birmingham or Miami?
Miami edges out Birmingham for sun in December: 28% clear historically versus 1% (8-year ERA5 average, a 27-point gap). Both are viable — Miami is the safer bet.
Compare Birmingham vs Miami 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.