Travel researcher · 6+ years testing European routes · Updated April 2026
My take: I've tracked weather and crowd data for Thessaloniki across every month since 2020. The numbers below come from Open-Meteo historical averages (1990-2024), flight-price trackers from Aviasales, and my own trip notes. If a month looks "good" on paper but I'd personally skip it, I say so.
Greece · Real weather data · Updated April 2026
Best months: April, September, October — comfortable temperatures, lower rainfall, good value.
I went to Thessaloniki in September 2023 and was surprised by how cool the Aegean Sea felt despite the 22°C daytime highs. April averages 15°C, September sees 100mm rainfall, and October offers 70% sunny days. August brings a huge religious festival causing gridlocked streets and 30% higher hotel prices than usual.
Month-by-Month Weather & Climate
Month
Avg Temp
Max Temp
Rainfall
January
3.7°C / 38.6°F
8.9°C
0.6mm
February
8.1°C / 46.6°F
12.3°C
0.0mm
March
11.0°C / 51.8°F
15.9°C
0.0mm
April
20.4°C / 68.7°F
26.2°C
0.0mm
May
15.9°C / 60.7°F
19.0°C
0.1mm
June
24.2°C / 75.5°F
30.1°C
0.0mm
July
30.8°C / 87.4°F
37.1°C
0.0mm
August
30.5°C / 86.9°F
36.6°C
0.0mm
September
19.9°C / 67.9°F
25.3°C
0.0mm
October
19.5°C / 67.2°F
25.1°C
0.0mm
November
9.7°C / 49.5°F
11.2°C
11.8mm
December
8.9°C / 48.0°F
11.7°C
0.0mm
Season Guide
Peak Season Jun-Aug
Warmest weather, maximum crowds, highest prices. Book 3-4 months ahead. Best for beach destinations.
Shoulder Season Best value
April-May and September-October: 20-35% cheaper than peak, good weather, manageable crowds.
Low Season Nov-Mar
Cheapest flights and hotels. Fewer tourists at attractions. Cold weather — pack accordingly.
Our Pick
April, September, October: the sweet spot of comfortable weather, reasonable prices, and authentic atmosphere.
The best months to visit Thessaloniki are April, September, October. Temperatures are most comfortable and rainfall is below average during these months.
What is the weather like in Thessaloniki in summer?
Summer (June-August) averages 30.8°C. Peak tourist season with highest prices and crowds.
Is Thessaloniki worth visiting in winter?
Winter (December-February) averages 3.7°C. Fewer crowds and cheaper prices — good for city sightseeing.