ERA5 almanac — 8 years of real data

Algarve in June

Algarve in June: 9% of days see measurable rain, 78°F average high, 76% of days historically clear (n=240, ERA5 2018–2025).

Historically one of the better months to visit Algarve for sun: 76% of days are clear on average (n=240, avg high 78°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 Algarve 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 Algarve 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	69%	n=120	78°F
Late June 16th–end	82%	n=120	78°F
Full month average	76%	n=240	78°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 Algarve 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	88%	n=120
Late June 16th–end	92%	n=120
Full month average	90%	n=240

13.8 h median sunshine per day 100% of days exceed 8 h sunshine 9% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 76%. Sunshine-based “warm & sunny”: 90%. 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

Algarve clears solidly in June: 76% of days historically (n=240), avg high 78°F. Most trips here in June will find more sun than cloud.

Every month in Algarve

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

Historical clear-sky % for Algarve, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	0%	n=248	All destinations →
February	1%	n=226	All destinations →
March	5%	n=248	All destinations →
April	20%	n=240	All destinations →
May	57%	n=248	All destinations →
June ← this page	76%	n=240	All destinations →
July	98%	n=248	All destinations →
August	98%	n=248	All destinations →
September	80%	n=240	All destinations →
October	53%	n=248	All destinations →
November	4%	n=240	All destinations →
December	0%	n=248	All destinations →

Frequently asked

Does it rain in Algarve in June?

Rarely. Only 9% of days in Algarve see measurable rain in June, based on 8 years of ERA5 historical data (n=240 days, 2018–2025). This is a historical average, not a forecast.

Is Algarve good for sun in June?

Yes. Algarve is historically strong for sun in June: 76% of days are clear on average (avg high 78°F, n=240 days, ERA5 2018–2025).

How Algarve compares in June

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

→ Algarve vs Sicily in June — Sicily is 73% clear historically
→ Algarve vs Mallorca in June — Mallorca is 72% clear historically
→ Algarve vs Ibiza in June — Ibiza is 82% clear historically

→ Algarve 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.