ERA5 almanac comparison — 8 years of real data
Charleston vs Memphis: weather in July
Memphis edges out Charleston for sun in July: 33% clear historically versus 12% (8-year ERA5 average, a 21-point gap). Charleston also sees measurably more rain than Memphis this month (61% vs 41% of days). Both are viable — Memphis is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific July. For this
week’s actual forecast, each destination links to its live page below.
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
Memphis
TN
- Clear days, July
- 33%
- Sample size
- n=248 days
- Avg high
- 91°F
- Early July (1st–15th)
- 31%
- Late July (16th–end)
- 34%
- Rain frequency
- 41% of days
Compare Charleston vs Memphis 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 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.