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SunnyDays

ERA5 almanac — 8 years of real data

Barcelona in July

Barcelona in July: 19% of days see measurable rain, 84°F average high, 64% of days historically clear (n=248, ERA5 2018–2025).

Barcelona in July is a mixed month for sun: 64% of days historically clear (n=248, avg high 84°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 July

Clear-sky percentage for Barcelona in July, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early July
1st–15th		 63% n=120 84°F
Late July
16th–end		 64% n=128 84°F
Full month average 64% n=248 84°F

Sunshine & warmth in July

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 July. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early July
1st–15th		 99% n=120
Late July
16th–end		 98% n=128
Full month average 98% n=248
14.0 h median sunshine per day 97% of days exceed 8 h sunshine 19% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 64%. Sunshine-based “warm & sunny”: 98%. The 34-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 July: 64% of days historically (n=248), avg high 84°F. Most trips here in July 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 61% n=240 All destinations →
July ← this page 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 July?

Rarely. Only 19% of days in Barcelona see measurable rain in July, based on 8 years of ERA5 historical data (n=248 days, 2018–2025). This is a historical average, not a forecast.

Is Barcelona good for sun in July?

Yes. Barcelona is historically strong for sun in July: 64% of days are clear on average (avg high 84°F, n=248 days, ERA5 2018–2025).

How Barcelona compares in July

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.