ERA5 almanac comparison — 8 years of real data
Birmingham vs Charleston: weather in June
Birmingham edges out Charleston for sun in June: 30% clear historically versus 22% (8-year ERA5 average, a 8-point gap). Both are viable — Birmingham is the safer bet.
Birmingham
AL
- Clear days, June
- 30%
- Sample size
- n=240 days
- Avg high
- 87°F
- Early June (1st–15th)
- 37%
- Late June (16th–end)
- 23%
- Rain frequency
- 44% of days
Charleston
SC
- Clear days, June
- 22%
- Sample size
- n=240 days
- Avg high
- 85°F
- Early June (1st–15th)
- 20%
- Late June (16th–end)
- 23%
- Rain frequency
- 54% of days
Frequently asked
Is Birmingham or Charleston warmer in June?
Birmingham runs warmer by day in June. Birmingham averages highs of 87°F (highs n=240 days); Charleston averages highs of 85°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Birmingham or Charleston in June?
Days with measurable rain: Birmingham 44%, Charleston 54% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in June, Birmingham or Charleston?
Birmingham edges out Charleston for sun in June: 30% clear historically versus 22% (8-year ERA5 average, a 8-point gap). Both are viable — Birmingham 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.