ERA5 almanac — 8 years of real data

Athens in June

Athens in June: 18% of days see measurable rain, 86°F average high, 69% of days historically clear (n=240, ERA5 2018–2025).

Athens in June is a mixed month for sun: 69% of days historically clear (n=240, avg high 86°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 Athens 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 Athens 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	67%	n=120	86°F
Late June 16th–end	71%	n=120	86°F
Full month average	69%	n=240	86°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 Athens 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	96%	n=120
Late June 16th–end	100%	n=120
Full month average	98%	n=240

14.0 h median sunshine per day 100% of days exceed 8 h sunshine 18% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 69%. Sunshine-based “warm & sunny”: 98%. The 29-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

Athens clears solidly in June: 69% of days historically (n=240), avg high 86°F. Most trips here in June will find more sun than cloud.

Every month in Athens

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

Historical clear-sky % for Athens, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	0%	n=248	All destinations →
February	0%	n=226	All destinations →
March	4%	n=248	All destinations →
April	24%	n=240	All destinations →
May	57%	n=248	All destinations →
June ← this page	69%	n=240	All destinations →
July	82%	n=248	All destinations →
August	79%	n=248	All destinations →
September	72%	n=240	All destinations →
October	56%	n=248	All destinations →
November	7%	n=240	All destinations →
December	0%	n=248	All destinations →

Frequently asked

Does it rain in Athens in June?

Rarely. Only 18% of days in Athens 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 Athens good for sun in June?

Yes. Athens is historically strong for sun in June: 69% of days are clear on average (avg high 86°F, n=240 days, ERA5 2018–2025).

How Athens compares in June

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

→ Athens vs Madrid in June — Madrid is 67% clear historically
→ Athens vs Mallorca in June — Mallorca is 72% clear historically
→ Athens vs Rome in June — Rome is 65% clear historically

→ Athens 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.