ERA5 almanac — 8 years of real data

Madrid in August

Madrid in August: rain frequency data not yet backfilled for this month, 93°F average high, 88% of days historically clear (n=248, ERA5 2018–2025).

Historically one of the better months to visit Madrid for sun: 88% of days are clear on average (n=248, avg high 93°F). Every percentage here is a historical average from 8 years of ERA5 data — 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 Madrid 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 August

Clear-sky percentage for Madrid in August, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period	% Clear days	Sample (n)	Avg high
Early August 1st–15th	92%	n=120	93°F
Late August 16th–end	85%	n=128	93°F
Full month average	88%	n=248	93°F

Bottom line

Madrid is historically one of the best US destinations for sun in August: 88% of days meet the clear bar (avg high 93°F, n=248 days across 8 years). Pack for outdoor activity — this month consistently delivers.

Every month in Madrid

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

Historical clear-sky % for Madrid, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	0%	n=248	All destinations →
February	0%	n=226	All destinations →
March	9%	n=248	All destinations →
April	20%	n=240	All destinations →
May	51%	n=248	All destinations →
June	67%	n=240	All destinations →
July	91%	n=248	All destinations →
August ← this page	88%	n=248	All destinations →
September	62%	n=240	All destinations →
October	38%	n=248	All destinations →
November	0%	n=240	All destinations →
December	0%	n=248	All destinations →

Frequently asked

Is Madrid good for sun in August?

Yes. Madrid is historically strong for sun in August: 88% of days are clear on average (avg high 93°F, n=248 days, ERA5 2018–2025).

→ Madrid live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in August — all destinations ranked by August 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.