ERA5 almanac comparison — 8 years of real data
Napa vs Nashville: weather in November
Napa edges out Nashville for sun in November: 18% clear historically versus 6% (8-year ERA5 average, a 12-point gap). Both are viable — Napa is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific November. For this
week’s actual forecast, each destination links to its live page below.
Napa
CA
- Clear days, November
- 18%
- Sample size
- n=240 days
- Avg high
- 66°F
- Early November (1st–15th)
- 35%
- Late November (16th–end)
- 2%
- Rain frequency
- 20% of days
Nashville
TN
- Clear days, November
- 6%
- Sample size
- n=240 days
- Avg high
- 60°F
- Early November (1st–15th)
- 12%
- Late November (16th–end)
- 1%
- Rain frequency
- 32% of days
Compare Napa vs Nashville 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.