May weather forecastThessaloniki, Greece
May weather for Thessaloniki, Greece: On the last day of the month, in Thessaloniki, sunrise is at 05:59 and sunset at 20:52 EEST. In Thessaloniki, Greece, during May, the rain falls for 12.8 days and regularly aggregates up to 40mm (1.57") of precipitation.

May
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). The cooler winds of winter are replaced by more temperate weather, inviting outdoor activities. The shift to summer introduces warmer and longer days facilitating more opportunities for tourism.Temperature
May marks a rise in the average high-temperature, moving from April's refreshing 18.6°C (65.5°F) to a warm 23.9°C (75°F). Thessaloniki experiences an average temperature drop to a moderate 13.1°C (55.6°F) during May nights.Humidity
The average relative humidity in May is 63%.Rainfall
In Thessaloniki, during May, the rain falls for 12.8 days and regularly aggregates up to 40mm (1.57") of precipitation. Throughout the year, there are 133.1 rainfall days, and 436mm (17.17") of precipitation is accumulated.Snowfall
In Thessaloniki, snow does not fall in April through October.Sea temperature
In May, the average sea temperature is 18.8°C (65.8°F).Note: Swimming is not a pleasurable activity for most people when the water temperature is 18.8°C (65.8°F). Breathing control gets harder as the water temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
In May, the average length of the day in Thessaloniki is 14h and 27min.On the first day of May in Thessaloniki, sunrise is at 06:26 and sunset at 20:24. On the last day of the month, sunrise is at 05:59 and sunset at 20:52 EEST.
Sunshine
In May, the average sunshine in Thessaloniki, Greece, is 11.1h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during May translates into these guidelines:
Make use of precautions - It is urged to ward off sun damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Thessaloniki, Greece
- Average high temperature in May: 23.9°C
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).
- Average low temperature in May: 13.1°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 in May
Thessaloniki, Greece
- Average pressure in May: 1013.7mbar
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 in May
Thessaloniki, Greece
- Average wind speed in May: 8.5km/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 in May
Thessaloniki, Greece
- Average humidity in May: 63%
The months with the highest relative humidity are January and February (75%).
The month with the lowest relative humidity is August (52%).
Average rainfall in May
Thessaloniki, Greece
- Average rainfall in May: 40mm
The wettest month (with the highest rainfall) is March (55mm).
The driest month (with the least rainfall) is August (20mm).
Average rainfall days in May
Thessaloniki, Greece
- Average rainfall days in May: 12.8 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 in May
Thessaloniki, Greece
- Average snowfall in May: 0mm
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 in May
Thessaloniki, Greece
- Average snowfall days in May: 0 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 in May
Thessaloniki, Greece
- Average sea temperature in May: 18.8°C
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 in May /
Average sunshine in May
Thessaloniki, Greece
- Average daylight in May: 14h and 30min
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 May: 11h and 6min
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 in May
Thessaloniki, Greece
- Average sunshine days in May: 15.6 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 in May
Thessaloniki, Greece
- Average UV index in May: 5
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 in May
Thessaloniki, Greece
- Average cloud cover in May: 24
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 in May
Thessaloniki, Greece
- Average visibility in May: 10km
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).





