ERA5 almanac — 8 years of real data

Barcelona in June

Barcelona in June: rain frequency data not yet backfilled for this month, 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

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

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).

→ Barcelona live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in June — all destinations ranked by June clear-sky %
→ All destinations
→ Raw data (JSON) — buckets, n, source

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.