ERA5 almanac comparison — 8 years of real data
Boundary Waters vs Charlottesville: weather in August
Charlottesville edges out Boundary Waters for sun in August: 40% clear historically versus 30% (8-year ERA5 average, a 10-point gap). Both are viable — Charlottesville is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific August. For this
week’s actual forecast, each destination links to its live page below.
Boundary Waters
MN
- Clear days, August
- 30%
- Sample size
- n=248 days
- Avg high
- 75°F
- Early August (1st–15th)
- 33%
- Late August (16th–end)
- 27%
Charlottesville
VA
- Clear days, August
- 40%
- Sample size
- n=248 days
- Avg high
- 87°F
- Early August (1st–15th)
- 35%
- Late August (16th–end)
- 44%
Compare Boundary Waters vs Charlottesville 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.