ERA5 almanac — 8 years of real data

Rome in June

Rome in June: 18% of days see measurable rain, 86°F average high, 65% of days historically clear (n=240, ERA5 2018–2025).

Rome in June is a mixed month for sun: 65% 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 Rome 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 Rome 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	57%	n=120	86°F
Late June 16th–end	73%	n=120	86°F
Full month average	65%	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 Rome 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	95%	n=120
Late June 16th–end	100%	n=120
Full month average	98%	n=240

14.1 h median sunshine per day 98% 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: 65%. Sunshine-based “warm & sunny”: 98%. The 33-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

Rome clears solidly in June: 65% of days historically (n=240), avg high 86°F. Most trips here in June will find more sun than cloud.

Every month in Rome

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

Historical clear-sky % for Rome, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	0%	n=248	All destinations →
February	0%	n=226	All destinations →
March	2%	n=248	All destinations →
April	16%	n=240	All destinations →
May	30%	n=248	All destinations →
June ← this page	65%	n=240	All destinations →
July	77%	n=248	All destinations →
August	59%	n=248	All destinations →
September	50%	n=240	All destinations →
October	38%	n=248	All destinations →
November	2%	n=240	All destinations →
December	0%	n=248	All destinations →

Frequently asked

Does it rain in Rome in June?

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

Yes. Rome is historically strong for sun in June: 65% of days are clear on average (avg high 86°F, n=240 days, ERA5 2018–2025).

How Rome compares in June

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

→ Rome vs Madrid in June — Madrid is 67% clear historically
→ Rome vs Dubrovnik in June — Dubrovnik is 62% clear historically
→ Rome vs Athens in June — Athens is 69% clear historically

→ Rome 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.