Climate averages 1991–2020
Thessaloníki weather
by month.
See how the year changes. July (tied with August) has the highest average daily maximum; August has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: SeptemberOctober
Long-term climate patterns, not a forecast for a particular trip.
Across the year Thessaloníki averages a daytime high of 19.6°C and a nighttime low of 12.3°C, with about 660 mm of rain on roughly 94 days. July (tied with August) is the warmest month (average high 30.1°C) and January the coolest (9.1°C). December is the wettest month with 69 mm; August is the driest with 43 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): September and October. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Thessaloníki
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Thessaloníki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.1°C2.1°C | 2.1°C | 51 | 7.4 | 9.610 h |
| February | 10.9°C3.4°C | 3.4°C | 48 | 8.2 | 10.611 h |
| March | 14.1°C6.2°C | 6.2°C | 61 | 9.2 | 11.912 h |
| April | 18.2°C10.4°C | 10.4°C | 57 | 9.4 | 13.313 h |
| May | 23.2°C15.5°C | 15.5°C | 68 | 9.5 | 14.414 h |
| June | 27.7°C20.0°C | 20.0°C | 50 | 8.2 | 15.015 h |
| July | 30.1°C22.3°C | 22.3°C | 45 | 6.4 | 14.815 h |
| August | 30.1°C22.5°C | 22.5°C | 43 | 6.2 | 13.814 h |
| September | 25.6°C18.3°C | 18.3°C | 50 | 6.8 | 12.513 h |
| October | 20.5°C13.6°C | 13.6°C | 58 | 7.1 | 11.211 h |
| November | 15.1°C8.7°C | 8.7°C | 59 | 7.4 | 10.010 h |
| December | 10.2°C3.9°C | 3.9°C | 69 | 8.0 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- ÉvosmosGreece · 4 kmHigh 20.1°C · Low 11.7°C · 660 mm rain a year
- LárisaGreece · 121 kmHigh 21.0°C · Low 11.4°C · 652 mm rain a year
- PrilepNorth Macedonia · 140 kmHigh 16.7°C · Low 6.9°C · 510 mm rain a year
- VolosGreece · 141 kmHigh 20.2°C · Low 13.7°C · 774 mm rain a year
- KumanovoNorth Macedonia · 195 kmHigh 17.9°C · Low 7.9°C · 520 mm rain a year
- SkopjeNorth Macedonia · 196 kmHigh 18.7°C · Low 8.3°C · 534 mm rain a year
- PernikBulgaria · 218 kmHigh 14.7°C · Low 5.1°C · 513 mm rain a year
- PlovdivBulgaria · 226 kmHigh 17.3°C · Low 7.6°C · 513 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+2, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 40.60°, 23.00° (7 km from the city centre), adjusted up by 1.2°C for the difference between the city's elevation (10 m) and the cell's (192 m). Rain comes from the 0.25° cell at 40.75°, 23.00°. Évosmos lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.