ERA5 almanac comparison — 8 years of real data
Birmingham vs Charleston: weather in July
Birmingham edges out Charleston for sun in July: 17% clear historically versus 12% (8-year ERA5 average, a 5-point gap). Both are viable — Birmingham is the safer bet.
Birmingham
AL
- Clear days, July
- 17%
- Sample size
- n=248 days
- Avg high
- 89°F
- Early July (1st–15th)
- 19%
- Late July (16th–end)
- 15%
- Rain frequency
- 55% of days
Charleston
SC
- Clear days, July
- 12%
- Sample size
- n=248 days
- Avg high
- 88°F
- Early July (1st–15th)
- 11%
- Late July (16th–end)
- 13%
- Rain frequency
- 61% of days
Frequently asked
Is Birmingham or Charleston warmer in July?
Birmingham runs warmer by day in July. Birmingham averages highs of 89°F (highs n=248 days); Charleston averages highs of 88°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Birmingham or Charleston in July?
Days with measurable rain: Birmingham 55%, Charleston 61% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in July, Birmingham or Charleston?
Birmingham edges out Charleston for sun in July: 17% clear historically versus 12% (8-year ERA5 average, a 5-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.