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SunnyDays

ERA5 almanac — 8 years of real data

Barcelona in June

Barcelona in June: 20% of days see measurable rain, 79°F average high, 61% of days historically clear (n=240, ERA5 2018–2025).

Barcelona in June is a mixed month for sun: 61% of days historically clear (n=240, avg high 79°F). The outcome varies year to year — check the early/late split below. 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 Barcelona 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 Barcelona 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		 52% n=120 79°F
Late June
16th–end		 70% n=120 79°F
Full month average 61% n=240 79°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 Barcelona 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		 81% n=120
Late June
16th–end		 97% n=120
Full month average 89% n=240
13.8 h median sunshine per day 96% of days exceed 8 h sunshine 20% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 61%. Sunshine-based “warm & sunny”: 89%. The 28-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

Barcelona clears solidly in June: 61% of days historically (n=240), avg high 79°F. Most trips here in June will find more sun than cloud.

Every month in Barcelona

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

Historical clear-sky % for Barcelona, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 0% n=226 All destinations →
March 3% n=248 All destinations →
April 4% n=240 All destinations →
May 25% n=248 All destinations →
June ← this page 61% n=240 All destinations →
July 64% n=248 All destinations →
August 53% n=248 All destinations →
September 38% n=240 All destinations →
October 27% n=248 All destinations →
November 4% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in Barcelona in June?

Sometimes. Barcelona sees measurable rain on 20% of days in June historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Barcelona good for sun in June?

Yes. Barcelona is historically strong for sun in June: 61% of days are clear on average (avg high 79°F, n=240 days, ERA5 2018–2025).

How Barcelona compares in June

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Barcelona 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.