Log visit
Greece
Thessaloníki weather by month
Historical averages 2016–2025 · not a forecast
Loading your weather period…
When is the best time to visit Thessaloníki?
For a warm holiday, the best week has been 13–19 September (Weather Index 95). Favourable start dates for a 7-day trip run from 7 September to 21 September. July and August are warmest (34°C), July and October are driest and June and July have the most sun.
- Warmest
- July and August 34°C
- Coolest
- January 11°C
- Driest
- July and October 18% rain-day chance
- Wettest
- May and June 38% rain-day chance
- Sunniest
- June and July 14 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Thessaloníki
Thessaloníki historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 10.5 | 2.9 | 27.7 | 8.6 | 59.2 | 6.8 |
| February | 14.1 | 5.3 | 26.4 | 7.4 | 37.2 | 7.5 |
| March | 17.1 | 7.8 | 37.4 | 11.6 | 79.4 | 9.0 |
| April | 21.3 | 11.2 | 29.0 | 8.7 | 58.2 | 11.1 |
| May | 25.6 | 15.6 | 37.7 | 11.7 | 87.9 | 12.0 |
| June | 31.1 | 20.4 | 38.3 | 11.5 | 75.5 | 13.8 |
| July | 34.1 | 22.6 | 18.1 | 5.6 | 42.9 | 13.9 |
| August | 33.9 | 22.5 | 20.3 | 6.3 | 51.4 | 12.8 |
| September | 29.2 | 18.5 | 21.7 | 6.5 | 36.0 | 10.9 |
| October | 23.2 | 13.3 | 17.7 | 5.5 | 48.4 | 8.5 |
| November | 17.5 | 9.5 | 33.7 | 10.1 | 76.1 | 6.7 |
| December | 12.6 | 5.3 | 24.5 | 7.6 | 75.2 | 6.3 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.