Thessaloniki Weather

The second largest city in the country and capital of the Macedonia region, Thessaloniki has a humid environment with low temperatures during the winter months, as well as lots of sunshine and warm waters in peak summertime.

Thessaloniki's summer months are quite warm, though with milder temperatures than most Greek islands. It is a great destination for a city-based vacation and hosts visitors throughout the year, as it is not only a summertime destination!

Below, you can see the average temperatures in Thessaloniki by month. We have also gathered information regarding the weather by month.

Average High & Low Air Temperature (in °C/°F)

 

Discover the weather in Thessaloniki by month:
January | February | March | April | May | June | July | August | September | October | November | December

January in Thessaloniki is the coldest of the year, with temperatures often reaching below the threshold of 0°C/32°F and very few sunlight hours.

The average temperature is 7.3°C/45.1°F (maximum 10°C/50°F | minimum 1.6°C/35°F)
On the coldest nights, the temperature may drop to -7.8°C/18°F.
On the warmest days, the temperature may reach 21.1°C/70°F.
The sunshine lasts approximately 3.5 hours.
Humidity reaches 75%, while the mean speed of the wind is around 13 kph (8.1 mph).
The mean sea temperature is about 14.1°C/57.4°F; hence, the waters are frigid.

Low temperatures and high levels of humidity are also apparent throughout February.

The average temperature is 8.7°C/47.6°F (maximum: 11.6°C/53°F | minimum 2.8°C/37°F).
On the coldest nights, the temperature may drop to -6.1°C/21°F.
On the warmest days, the temperature may reach 21.1°C/70°F.
The sunshine lasts approximately 4 hours.
Humidity reaches 72%, while the mean speed of the wind is around 11.9 kph (7.4 mph).
The mean sea temperature is about 13.5°C/56.3°F; hence, the waters are freezing cold.

March is a month with some warmer days, though it is mostly a cold time in Thessaloniki with freezing waters.

The average temperature is 10.1°C/50.2°F (maximum 15°C/59°F | minimum 5°C/41°F).
On the coldest nights, the temperature may drop to -2.8°C/27°F.
On the warmest days, the temperature may reach 28.9°C/84°F.
The sunshine lasts approximately 5.5 hours.
Humidity reaches 69%, while the mean speed of the wind is around 7.1 kph (11.5 mph).
The mean sea temperature is about 13.3°C/55.9°F; hence, swimming is not recommended at all.

Thessaloniki has some more sunlight hours per day in April, with temperatures between 10°C/50°F and 20°C/68°F.

The average temperature is 14.1°C/57.3°F (maximum 19.4°C/67°F | minimum 8.3°C/47°F).
On the coldest nights, the temperature may drop to 2.2°C/36°F.
On the warmest days, the temperature may reach 30°C/86°F.
The sunshine lasts approximately 7 hours.
Humidity reaches 67%, while the mean speed of the wind is around 11.1 kph (6.9 mph).
The mean sea temperature is about 14.4°C/57.9°F; hence, the waters are very cold.

The warmer temperatures of May invite more people to visit Thessaloniki, which has over 8 hours of sunlight per day and an overall warmer climate.

The average temperature is 19.3°C/66.7°F (maximum: 25°C/77°F | minimum: 13.9°C/57°F).
On the coldest nights, the temperature may drop to 2.2°C/36°F.
On the warmest days, the temperature may reach 36.1°C/97°F.
The sunshine lasts approximately 8.5 hours.
Humidity reaches 63%, while the mean speed of the wind is around 10.6 kph (6.6 mph).
The mean sea temperature is about 18.7°C/65.7°F; hence, the waters are a little cold.

The first month of the summer, June is much warmer and less humid, with temperatures often rising above 30°C/86°F.

The average temperature is 24.6°C/76.3°F (maximum 30°C/86°F | minimum 18.3°C/65°F).
On the coldest nights, the temperature may drop to 12.2°C/54°F.
On the warmest days, the temperature may reach 38.9°C/102°F.
The sunshine lasts approximately 10 hours.
Humidity reaches 57%, while the mean speed of the wind is around 11.1 kph (6.9 mph).
The mean sea temperature is 23.7°C/74.7°F; hence, the waters are warm.

Urban tourists start to visit Thessaloniki en masse during the mid-summer since its high air temperatures and warm waters are excellent for a hot summertime!

The average temperature is 27.8°C/82.1°F (maximum 32.2°C/90°F | minimum 20.6°C/69°F).
On the coldest nights, the temperature may drop to 17.8°C/64°F.
On the warmest days, the temperature may reach 40°C/104°F.
The sunshine lasts approximately 11 hours.
Humidity reaches 53%, while the mean speed of the wind is around 12.4 kph (7.7 mph).
The mean sea temperature is 26.1°C/79°F; hence, the waters are very warm.

August has temperatures at an all-year high, with the city being overflown and most of its accommodation options filling up. In case you want to stay in Thessaloniki throughout the summer or early autumn, it is suggested that you pre-book your tickets and hotel room in advance.

The average temperature is 27.1°C/80.8°F (maximum 32.2°C/90°F | minimum 19.4°C/67°F).
On the coldest nights, the temperature may drop to 12.2°C/54°F.
On the warmest days, the temperature may reach 41.1°C/106°F.
The sunshine lasts approximately 10 hours.
Humidity reaches 55%, while the mean speed of the wind is around 11.2 kph (7 mph).
The mean sea temperature is 26°C/78.8°F; hence, the waters are very warm.

September in Thessaloniki is warm with enough sunshine hours, some days of fine weather, and a small drop in hotel prices.

The average temperature is 22.8°C/73.1°F (maximum 27.2°C/81°F | minimum 16.7°C/62°F).
On the coldest nights, the temperature may drop to 7.8°C/46°F.
On the warmest days, the temperature may reach 33.9°C/93°F.
The sunshine lasts approximately 8 hours.
Humidity reaches 61%, while the mean speed of the wind is around 10.8 kph (6.7 mph).
The mean sea temperature is 24.6°C/76.3°F; hence, the waters are quite warm.

The month of October has temperatures around 17°C/62.6°F and few strong winds. Along with September, October is a preferred month for festival lovers and anyone who enjoys the mild, breezy autumn weather.

The average temperature is 17.5°C/63.5°F (maximum 21.7°C/71°F | minimum 12.2°C/54°F).
On the coldest nights, the temperature may drop to 6.1°C/43°F.
On the warmest days, the temperature may reach 30°C/86°F.
The sunshine lasts approximately 5.5 hours.
Humidity reaches 71%, while the mean speed of the wind is around 9.7 kph (6 mph).
The mean sea temperature is 21°C/69.8°F; hence, the waters are a little warm.

November is more humid, while temperatures are usually below 15°C/59°F.

The average temperature is 14.7°C/58.5°F (maximum 16.1°C/61°F | minimum 7.8°C/46°F).
On the coldest nights, the temperature may drop to 0°C/32°F.
On the warmest days, the temperature may reach 27.2°C/81°F.
The sunshine lasts approximately 4 hours.
Humidity reaches 75%, while the mean speed of the wind is around 10 kph (6.2 mph).
The mean sea temperature is 17.6°C/63.7°F; hence, the waters are a bit cold.

December is cold, rainy, and very humid, with temperatures below 10°C/50°F.

The average temperature is 9.4°C/49°F (maximum 11.1°C/52°F | minimum 3.3°C/38°F).
On the coldest nights, the temperature may drop to -5°C/23°F.
On the warmest days, the temperature may reach 18.9°C/66°F.
The sunshine lasts approximately 3.5 hours.
Humidity reaches 77%, while the mean speed of the wind is around 10.3 kph (6.4 mph).
The mean sea temperature is about 14.9°C/58.8°F; hence, the waters are cold.