ERA5 almanac comparison — 8 years of real data
Birmingham vs Charleston: weather in April
Charleston edges out Birmingham for sun in April: 38% clear historically versus 27% (8-year ERA5 average, a 11-point gap). Both are viable — Charleston is the safer bet.
Birmingham
AL
- Clear days, April
- 27%
- Sample size
- n=240 days
- Avg high
- 72°F
- Early April (1st–15th)
- 22%
- Late April (16th–end)
- 32%
- Rain frequency
- 34% of days
Charleston
SC
- Clear days, April
- 38%
- Sample size
- n=240 days
- Avg high
- 74°F
- Early April (1st–15th)
- 30%
- Late April (16th–end)
- 45%
- Rain frequency
- 26% of days
Frequently asked
Is Birmingham or Charleston warmer in April?
Charleston runs warmer by day in April. Birmingham averages highs of 72°F (highs n=240 days); Charleston averages highs of 74°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Birmingham or Charleston in April?
Days with measurable rain: Birmingham 34%, Charleston 26% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in April, Birmingham or Charleston?
Charleston edges out Birmingham for sun in April: 38% clear historically versus 27% (8-year ERA5 average, a 11-point gap). Both are viable — Charleston is the safer bet.
Compare Birmingham vs Charleston 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.