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SunnyDays

ERA5 almanac — 8 years of real data

Santorini in November

Santorini in November: 16% of days see measurable rain, 68°F average high, 16% of days historically clear (n=240, ERA5 2018–2025).

Santorini in November is historically a poor month for sun: only 16% of days clear across 8 years (n=240, avg high 68°F). July is the clearest month for Santorini historically. 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 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 November

Clear-sky percentage for Santorini in November, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early November
1st–15th		 25% n=120 68°F
Late November
16th–end		 6% n=120 68°F
Full month average 16% n=240 68°F

Sunshine & warmth in November

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 Santorini in November. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early November
1st–15th		 29% n=120
Late November
16th–end		 8% n=120
Full month average 18% n=240
9.7 h median sunshine per day 84% of days exceed 8 h sunshine 16% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 16%. Sunshine-based “warm & sunny”: 18%. The two measures are nearly identical here — no convective-storm bias for this climate and month.

Bottom line

Santorini is a poor choice for sun in November: just 16% of days clear historically (n=240). July is the historically strongest month for sun here. The 8-year record is consistent — this is not a fluke bad stretch.

→ See all destinations in July — historically the best month for sun in Santorini.

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 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 ← this page 16% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in Santorini in November?

Rarely. Only 16% of days in Santorini see measurable rain in November, based on 8 years of ERA5 historical data (n=240 days, 2018–2025). This is a historical average, not a forecast.

Is Santorini good for sun in November?

Not usually. Santorini is historically overcast in November: only 16% of days are clear (avg high 68°F, n=240 days, ERA5 2018–2025). July is historically far better for sun here.

How Santorini compares in November

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

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.