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SunnyDays

ERA5 almanac — 8 years of real data

Bar Harbor in June

Bar Harbor in June: 34% of days see measurable rain, 70°F average high, 20% of days historically clear (n=240, ERA5 2018–2025).

Bar Harbor in June is historically a poor month for sun: only 20% of days clear across 8 years (n=240, avg high 70°F). July is the clearest month for Bar Harbor historically. Historical average, not a forecast.

What you are reading: 8-year historical averages from the ERA5 reanalysis, not a forecast. A month that is historically 90% clear can still be overcast on your specific trip. For this week’s actual forecast, see the live Bar Harbor page. Both can be true at once: “historically strong in this month; this particular week is not.” We label which is which.

Early vs. Late June

Clear-sky percentage for Bar Harbor in June, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early June
1st–15th		 13% n=120 70°F
Late June
16th–end		 26% n=120 70°F
Full month average 20% n=240 70°F

Sunshine & warmth in June

A second measure using actual sunshine hours (ERA5 sunshine_duration), not the daily weather code. A Lowcountry day with 12 hours of sun and a 25-minute afternoon storm is counted below as a warm, sunny day — because it was. How we define this.

Sunshine-based metrics for Bar Harbor in June. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early June
1st–15th		 22% n=120
Late June
16th–end		 46% n=120
Full month average 34% n=240
12.7 h median sunshine per day 72% of days exceed 8 h sunshine 34% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 20%. Sunshine-based “warm & sunny”: 34%. The 14-point gap is from brief afternoon convective storms that stamp the whole day as “rain” in the WMO code but leave the bulk of the sunshine untouched.

Bottom line

Bar Harbor is mostly overcast in June historically: only 20% of days are clear across 8 years (n=240), avg high 70°F. If you want sun in Bar Harbor, July is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in July — historically the best month for sun in Bar Harbor.

Every month in Bar Harbor

Compare across all months with data. Numbers are historical clear-sky %.

Historical clear-sky % for Bar Harbor, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 0% n=226 All destinations →
March 0% n=248 All destinations →
April 0% n=240 All destinations →
May 6% n=248 All destinations →
June ← this page 20% n=240 All destinations →
July 40% n=248 All destinations →
August 36% n=248 All destinations →
September 16% n=240 All destinations →
October 2% n=248 All destinations →
November 0% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in Bar Harbor in June?

Sometimes. Bar Harbor sees measurable rain on 34% of days in June historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Bar Harbor good for sun in June?

Not usually. Bar Harbor is historically overcast in June: only 20% of days are clear (avg high 70°F, n=240 days, ERA5 2018–2025). July is historically far better for sun here.

How Bar Harbor compares in June

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Bar Harbor this month — same passport tier, similar flight distance, both sides from the same 8-year ERA5 record.

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.