ERA5 almanac — 8 years of real data

Sicily in June

Sicily in June: 12% of days see measurable rain, 87°F average high, 73% of days historically clear (n=240, ERA5 2018–2025).

Historically one of the better months to visit Sicily for sun: 73% of days are clear on average (n=240, avg high 87°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 Sicily 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 Sicily 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	87°F
Late June 16th–end	79%	n=120	87°F
Full month average	73%	n=240	87°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 Sicily 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	92%	n=120
Late June 16th–end	99%	n=120
Full month average	96%	n=240

14.0 h median sunshine per day 98% of days exceed 8 h sunshine 12% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 73%. Sunshine-based “warm & sunny”: 96%. The 23-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

Sicily clears solidly in June: 73% of days historically (n=240), avg high 87°F. Most trips here in June will find more sun than cloud.

Every month in Sicily

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

Historical clear-sky % for Sicily, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	0%	n=248	All destinations →
February	0%	n=226	All destinations →
March	1%	n=248	All destinations →
April	10%	n=240	All destinations →
May	39%	n=248	All destinations →
June ← this page	73%	n=240	All destinations →
July	91%	n=248	All destinations →
August	73%	n=248	All destinations →
September	58%	n=240	All destinations →
October	33%	n=248	All destinations →
November	2%	n=240	All destinations →
December	0%	n=248	All destinations →

Frequently asked

Does it rain in Sicily in June?

Rarely. Only 12% of days in Sicily 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 Sicily good for sun in June?

Yes. Sicily is historically strong for sun in June: 73% of days are clear on average (avg high 87°F, n=240 days, ERA5 2018–2025).

How Sicily compares in June

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

→ Sicily vs Mallorca in June — Mallorca is 72% clear historically
→ Sicily vs Algarve in June — Algarve is 76% clear historically
→ Sicily vs Athens in June — Athens is 69% clear historically

→ Sicily 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.