Climate and monthly weather forecastThessaloniki, Greece
Thessaloniki, Greece - Climate and weather forecast by month. Detailed climate information with charts - average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. The month with the most rainfall in Thessaloniki is March, when the rain falls for 14.3 days and typically aggregates up to 55mm (2.17") of precipitation. Thessaloniki experiences moderate to warm temperatures throughout the year, with a yearly high average from 8.4°C (47.1°F) in January to a peak of 31.8°C (89.2°F) in July.
Climate and monthly weather forecast
The climate of Thessaloniki
Thessaloniki, Greece, is characterized by a Cfa Köppen climate classification, generally defined as a humid subtropical climate with no dry season. Its geographical position close to the sea mitigates the temperature extremities and adds a pleasant, humid layer to the atmosphere. Thessaloniki experiences moderate to warm temperatures throughout the year, with a yearly high average from 8.4°C (47.1°F) in January to a peak of 31.8°C (89.2°F) in July. It correlates with humidity levels, which tend to decrease during summer months to a low of 52% in August.Precipitation ranges between 20mm (0.79") in August and 55mm (2.17") in March, spread throughout the month in varying intensities. On average, rainfall days range from 8.4 to 14.3 days per month. Snowfall is almost non-existent apart from the colder winter months of January and February. Sea temperatures remain pleasant throughout the year, peaking at 26.2°C (79.2°F) during the height of summer in July.
Daylight hours mark a significant increase during the summer months, providing ample sunshine for outdoor activities. In sync, sunshine hours range from 5.8 hours per day in January to an extravagant 11.9 hours per day during July and August. Relative UV index during these months reaches a maximum of 7, one needs to take precautionary measures during this high UV exposure period. A fair visibility of 9km (5.6mi) to 10km (6.2mi) is maintained throughout the year.
The best time to visit Thessaloniki
Accommodating the climatic preferences of everyone, Thessaloniki can be comfortably visited at any time of the year. Notwithstanding, the ultimate period would be from May to October, enveloping late spring, entirety of summer, and early autumn. Temperatures during this time remain consistently warm, averaging between 18.6°C (65.5°F) to 31.7°C (89.1°F). Rainfall is at its minimal during July and August, making it optimal for outdoor activities and beach visits. With the sea temperature reaching a high of 26.2°C (79.2°F) in July, it enables an utmost pleasant experience for swimming.The worst time to visit Thessaloniki
Owing to the mild winters and pleasant climates, there is no particular time that could be classified as the worst for visit. However, if a tourist's prime objective is to evade lower temperatures and any possible snowfall, January and February might not be the optimal choice.Spring weather in Thessaloniki
Spring in Thessaloniki is a symphony of moderately warm temperatures and blooming scenery. March, April and May temperatures progressively increase from 14.3°C (57.7°F) to 23.9°C (75°F), while night temperatures remain comfortably cool. Rainfall decreases gradually from 55mm (2.17") in March to 40mm (1.57") in May, providing a refreshing balance to the warming atmosphere. Daylight extends to the longer 14.4 hours per day by May, complimenting the average sunshine hours that escalate to 11.1 hours by the end of spring.Summer weather in Thessaloniki
Spanning between June and August, summer in Thessaloniki is characterized by hot temperatures, scarce rainfall, and plenty of sunshine. It offers the hottest months of the year, with average high temperature soaring up to 28.4°C (83.1°F) in June and peaking at 31.8°C (89.2°F) by July. The humidity decreases in this season, providing relief from the heat. Sea temperature is high enough for a comfortable swim, extending from 23.8°C (74.8°F) in June to peak at 26.2°C (79.2°F) in July.Autumn weather in Thessaloniki
Autumn witnesses a cool and comfortable outlook in Thessaloniki. September to November sees a decrease in temperatures from 26.4°C (79.5°F) to a milder 15.7°C (60.3°F), accompanied by an increase in precipitation. Rainfall registers a rise from 28mm (1.1") in September to 48mm (1.89") in November. However, the cloud coverage allows for a reasonable amount of sunlight to make autumn days pleasant, with extended daylight hours and still adequate sea temperatures for swimming.Winter weather in Thessaloniki
Winter in Thessaloniki is quite mild, unlike the harsh winters of northern Greece. December to February display lower temperatures from 10.1°C (50.2°F) to 8.4°C (47.1°F) alongside an increase in rainfall, peaking at 41mm (1.61") in December. The number of sunshine hours drops to just above half of the summer months, with 6.1 to 6.2 hours per day. Winter also presents a great chance to witness a rare snowfall event with slight accumulation during January and February.Weather in January
January in Thessaloniki, Greece, is dominated by a winter chill. Humidity is significantly high with the lowest temperature of 2.2°C (36°F), supplemented by the highest snowfall of 35mm (1.38") compared to other months. The new year brings about an invitingly fresh snowfall, with over two days of snow landed. Weather in January »Weather in February
As the year progresses, the weather in Thessaloniki shifts gently in February. Despite the cold temperatures, the city experiences a decrease in snowfall compared to the previous month, standing at 34mm (1.34") for this month. Weather in February »Weather in March
March commences the spring season, known for its moderate weather conditions in Thessaloniki. A noteworthy shift can be seen in temperature that rises up to 14.3°C (57.7°F), with snowfall sharply decreasing to a mere 10mm (0.39"). Weather in March »Weather in April
Thessaloniki welcomes April with open arms, quite warmly. Without any snowfall for this month, there's a clear change in weather patterns, marked by the rise in average temperatures to 18.6°C (65.5°F). As the city waves goodbye to winter, a surge in sunshine hours unveils longer, brighter days. Weather in April »Weather in May
The arrival of May indicates the onset of summer in Thessaloniki. Skies tend to be clearer as the percentage of cloud cover decreases significantly. The mercury soars higher during this time, touching a peak temperature of 23.9°C (75°F). Weather in May »Weather in June
June is quintessentially summer in Thessaloniki. The temperature continues to rise, peaking at 28.4°C (83.1°F), offering clear skies and plenty of sunshine. Diverse events and festivals colour the streets during this month, making it one of the most exciting times to visit. Weather in June »Weather in July
July brings the peak of summer to Thessaloniki, with the maximum temperature reaching a scorching 31.8°C (89.2°F). This is accompanied by lowest rainfall of 22mm (0.87") held in the entire year, making it the driest month. The high temperature encourages beach visits and water sports, while the balmy evenings offer a vibrant nightlife scene. Weather in July »Weather in August
The weather in August remains quite similar to July with the temperature maintaining its high of 31.7°C (89.1°F). However, there's a minor increase in humidity which could make the heat feel more intense. With numerous festivals taking place during August, there's plenty to do both day and night. Weather in August »Weather in September
September marks the transition from summer to autumn in Thessaloniki. However, the warmth lingers on with average maximum temperatures sliding to 26.4°C (79.5°F). By the end of September, the weather starts to freshen up, making way for the fall season. Weather in September »Weather in October
October brings a significant change in the weather of Thessaloniki. From the high heat of summer, temperatures drop down to a more comfortable 20.3°C (68.5°F). The landscape starts blushing in shades of red and orange revealing a picturesque view of the city. Weather in October »Weather in November
Thessaloniki, in November, undergoes another drop in temperature now down to 15.7°C (60.3°F). A noticeable rise in rainfall is evident as it is the second-highest in the year, signalling the onset of winter. Days are quite shorter, and evenings turn chilly, the city switching mode to the quiet and calm winters. Weather in November »Weather in December
In December, the winter spell fully sets in Thessaloniki. As temperatures dip further down to 10.1°C (50.2°F), the city witnesses its first snowfall since April. This marks the return of snow-capped landscapes and frosty mornings. Weather in December »Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Thessaloniki's January weather, with an average high temperature of 8.4°C (47.1°F) and an average low temperature of 2.2°C (36°F), tends to be the coldest of the year.
The months with the highest humidity are January and February, with an average relative humidity of 75%.
Throughout the year, in Thessaloniki, Greece, there are 133.1 rainfall days, and 436mm (17.17") of precipitation is accumulated.
Months with snowfall in Thessaloniki are January through March, November and December.
January is the month with the most snowfall in Thessaloniki. Snow falls for 2.1 days and accumulates 35mm (1.38") of snow.
Throughout the year, in Thessaloniki, Greece, there are 4.9 snowfall days, and 86mm (3.39") of snow is accumulated.
January has the least sunshine of the year, with an average of 5.8h of sunshine.
The months with the lowest UV index in Thessaloniki, Greece, are January and December, with an average maximum UV index of 2.
The month with the most rainfall in Thessaloniki is March, when the rain falls for 14.3 days and typically aggregates up to 55mm (2.17") of precipitation.
The month with the coldest seawater is March, with an average sea temperature of 13.3°C (55.9°F).
In Thessaloniki, snow does not fall in April through October.
With an average of 15h and 0min of daylight, June has the longest days of the year in Thessaloniki.
Thessaloniki's temperatures peak on average in July, reaching 31.8°C (89.2°F) at their highest and 20.1°C (68.2°F) at their lowest.
With an average sea temperature of 26.2°C (79.2°F), July is the month with the warmest seawater.
July and August, with an average of 11.9h of sunshine, are months with the most sunshine in Thessaloniki.
July and August, with an average maximum UV index of 7, are months with the highest UV index.
The least humid month is August, with an average relative humidity of 52%.
The month with the least rainfall is August, when the rain falls for 8.4 days and typically collects 20mm (0.79") of precipitation.
On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends in Thessaloniki, and the time zone changes from EEST to EET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 03:00, and the time zone reverts from EET to EEST.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Thessaloniki, Greece
The warmest month (with the highest average high temperature) is July (31.8°C).
The month with the lowest average high temperature is January (8.4°C).
The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure
Thessaloniki, Greece
- Average pressure in January:
1018.2mbar - Average pressure in February:
1016.6mbar - Average pressure in March:
1015.7mbar - Average pressure in April:
1014.8mbar - Average pressure in May:
1013.7mbar - Average pressure in June:
1013.4mbar
- Average pressure in July:
1013.2mbar - Average pressure in August:
1014.7mbar - Average pressure in September:
1016.2mbar - Average pressure in October:
1018.3mbar - Average pressure in November:
1018.5mbar - Average pressure in December:
1019.8mbar
The month with the highest atmospheric pressure is December (1019.8mbar).
The month with the lowest atmospheric pressure is July (1013.2mbar).
Average wind speed
Thessaloniki, Greece
- Average wind speed in January:
8.8km/h - Average wind speed in February:
9.2km/h - Average wind speed in March:
9km/h - Average wind speed in April:
8.5km/h - Average wind speed in May:
8.5km/h - Average wind speed in June:
8.2km/h
- Average wind speed in July:
8.2km/h - Average wind speed in August:
7.5km/h - Average wind speed in September:
7.8km/h - Average wind speed in October:
7.5km/h - Average wind speed in November:
7.3km/h - Average wind speed in December:
8.9km/h
The windiest month (with the highest average wind speed) is February (9.2km/h).
The calmest month (with the lowest average wind speed) is November (7.3km/h).
Average humidity
Thessaloniki, Greece
The months with the highest relative humidity are January and February (75%).
The month with the lowest relative humidity is August (52%).
Average rainfall
Thessaloniki, Greece
The wettest month (with the highest rainfall) is March (55mm).
The driest month (with the least rainfall) is August (20mm).
Average rainfall days
Thessaloniki, Greece
- Average rainfall days in January:
10.8 days - Average rainfall days in February:
11.3 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
8.4 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
9.9 days - Average rainfall days in December:
9.5 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is August (8.4 days).
Average snowfall
Thessaloniki, Greece
The month with the highest snowfall is January (35mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Thessaloniki, Greece
- Average snowfall days in January:
2.1 days - Average snowfall days in February:
1.6 days - Average snowfall days in March:
0.4 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.7 days
The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature
Thessaloniki, Greece
The best month for swimming (with the highest average sea temperature) is July (26.2°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).
Average daylight / Average sunshine
Thessaloniki, Greece
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
6h and 12min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 48min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 54min - Average sunshine in September:
9h and 36min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 6min - Average sunshine in December:
6h and 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days
Thessaloniki, Greece
- Average sunshine days in January:
17.6 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
15 days - Average sunshine days in May:
15.6 days - Average sunshine days in June:
13.5 days
- Average sunshine days in July:
18.5 days - Average sunshine days in August:
20 days - Average sunshine days in September:
17.9 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
18 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is August (20 days).
The month with the least sunshine days is June (13.5 days).
Average UV index
Thessaloniki, Greece
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Thessaloniki, Greece
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility
Thessaloniki, Greece
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, November and December (9km).
