ERA5 almanac comparison — 8 years of real data
Lake Tahoe vs Leavenworth: weather in September
Leavenworth edges out Lake Tahoe for sun in September: 57% clear historically versus 48% (8-year ERA5 average, a 9-point gap). Both are viable — Leavenworth is the safer bet.
Lake Tahoe
CA
- Clear days, September
- 48%
- Sample size
- n=240 days
- Avg high
- 72°F
- Early September (1st–15th)
- 65%
- Late September (16th–end)
- 31%
- Rain frequency
- 10% of days
Leavenworth
WA
- Clear days, September
- 57%
- Sample size
- n=240 days
- Avg high
- 78°F
- Early September (1st–15th)
- 66%
- Late September (16th–end)
- 48%
- Rain frequency
- 19% of days
Frequently asked
Is Lake Tahoe or Leavenworth warmer in September?
Leavenworth runs warmer by day in September. Lake Tahoe averages highs of 72°F (highs n=240 days); Leavenworth averages highs of 78°F (highs n=240 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Lake Tahoe or Leavenworth in September?
Days with measurable rain: Lake Tahoe 10%, Leavenworth 19% (n=240 and n=240 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in September, Lake Tahoe or Leavenworth?
Leavenworth edges out Lake Tahoe for sun in September: 57% clear historically versus 48% (8-year ERA5 average, a 9-point gap). Both are viable — Leavenworth is the safer bet.
Compare Lake Tahoe vs Leavenworth 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.