ERA5 almanac comparison — 8 years of real data
Charlottesville vs Los Cabos: weather in September
Los Cabos edges out Charlottesville for sun in September: 51% clear historically versus 46% (8-year ERA5 average, a 5-point gap). Both are viable — Los Cabos is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific September. For this
week’s actual forecast, each destination links to its live page below.
Charlottesville
VA
- Clear days, September
- 46%
- Sample size
- n=240 days
- Avg high
- 81°F
- Early September (1st–15th)
- 53%
- Late September (16th–end)
- 38%
Los Cabos
MX
- Clear days, September
- 51%
- Sample size
- n=240 days
- Avg high
- 90°F
- Early September (1st–15th)
- 41%
- Late September (16th–end)
- 61%
Compare Charlottesville vs Los Cabos 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.