ERA5 almanac comparison — 8 years of real data
Boundary Waters vs Cape Cod: weather in June
Cape Cod edges out Boundary Waters for sun in June: 32% clear historically versus 26% (8-year ERA5 average, a 6-point gap). Both are viable — Cape Cod is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific June. For this
week’s actual forecast, each destination links to its live page below.
Boundary Waters
MN
- Clear days, June
- 26%
- Sample size
- n=240 days
- Avg high
- 74°F
- Early June (1st–15th)
- 25%
- Late June (16th–end)
- 28%
Cape Cod
MA
- Clear days, June
- 32%
- Sample size
- n=240 days
- Avg high
- 73°F
- Early June (1st–15th)
- 27%
- Late June (16th–end)
- 37%
Compare Boundary Waters vs Cape Cod 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.