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SunnyDays

ERA5 almanac — 8 years of real data

Santorini in June

Santorini in June: rain frequency data not yet backfilled for this month, 82°F average high, 89% of days historically clear (n=240, ERA5 2018–2025).

Historically one of the better months to visit Santorini for sun: 89% of days are clear on average (n=240, avg high 82°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 Santorini 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 Santorini 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		 89% n=120 82°F
Late June
16th–end		 89% n=120 82°F
Full month average 89% n=240 82°F

Bottom line

Santorini is historically one of the best US destinations for sun in June: 89% of days meet the clear bar (avg high 82°F, n=240 days across 8 years). Pack for outdoor activity — this month consistently delivers.

Every month in Santorini

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

Historical clear-sky % for Santorini, 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 14% n=240 All destinations →
May 52% n=248 All destinations →
June ← this page 89% n=240 All destinations →
July 95% n=248 All destinations →
August 93% n=248 All destinations →
September 86% n=240 All destinations →
October 59% n=248 All destinations →
November 16% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Is Santorini good for sun in June?

Yes. Santorini is historically strong for sun in June: 89% of days are clear on average (avg high 82°F, n=240 days, ERA5 2018–2025).

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.