Summers (June–September) bring long sunny days, 26–34°C in Athens and the islands; the meltemi winds cool the Cyclades but can disrupt small-boat trips. Spring and autumn hover 18–25°C with clear skies and fewer crowds—ideal for sailing, hiking, or wine touring. Winter is 8–15°C, better for archaeological touring in Athens or the Peloponnese; mountains can see snow, adding alpine options around Arachova or Metsovo.
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