Climate & Weather in Thessaloniki

Good to Know

• May, June, September, and October offer the most balanced weather—warm afternoons (19–25°C (66–77°F) / 67–77°F), lower rainfall, and manageable crowds.
• July and August are peak season with temperatures 30–32°C (86–90°F) and intense heat; many locals follow a siesta pattern (long lunch, late dinner after 9 PM).
• January and February bring cold, wet conditions (8–10°C (50°F) / 46–50°F) and rare but possible snow; indoor attractions and museums are less crowded.
• Winter (November–February) sees the most rainfall and cloudiest skies; autumn (September–October) remains pleasant but increasingly rainy as you move into late October.
• Summers are dry but humid, with low rainfall concentrated in March, June, and December; rare thunderstorms possible.
• Humidity peaks at 75–78% in December–February and drops to 52% in July.
• Sea temperature peaks at 26–27°C (79–81°F) in July–August, making it suitable for swimming; drops to 12–13°C (54–55°F) in February.