May weather forecast
Thessaloniki, Greece

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A street in front of the ancient white tower in Thessaloniki, Greece
A street in front of the ancient white tower in Thessaloniki, Greece

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.
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Frequently asked questions

What are the temperatures in Thessaloniki in May?

In Thessaloniki, in May, the average high-temperature is 23.9°C (75°F), and the average low-temperature is 13.1°C (55.6°F).

What is the average humidity in May in Thessaloniki?

In May, the average relative humidity in Thessaloniki is 63%.

How much does it rain in Thessaloniki in May?

In Thessaloniki, Greece, during May, the rain falls for 12.8 days and regularly aggregates up to 40mm (1.57") of precipitation.

When it does not snow in Thessaloniki?

April through October are months without snowfall in Thessaloniki.

How cold is the water in May in Thessaloniki?

In May, the average sea temperature in Thessaloniki is 18.8°C (65.8°F). For most, swimming in 18.8°C (65.8°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

How many hours of daylight does Thessaloniki have in May?

The average day length in May is 14h and 27min.

What time are sunrise and sunset in May in Thessaloniki?

In May, on the first day of the month, sunrise is at 06:26 and sunset at 20:24. On the last day of the month, in Thessaloniki, sunrise is at 05:59 and sunset at 20:52 EEST.

How long on average sun shines in May in Thessaloniki?

The average sunshine duration in May is 11.1h.

How high is the UV index in May in Thessaloniki?

In Thessaloniki, Greece, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Thessaloniki, Greece

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).

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Average pressure in May
Thessaloniki, Greece

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).

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Average wind speed in May
Thessaloniki, Greece

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).

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Average humidity in May
Thessaloniki, Greece

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%).

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Average rainfall in May
Thessaloniki, Greece

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).

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Average rainfall days in May
Thessaloniki, Greece

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).

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Average snowfall in May
Thessaloniki, Greece

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).

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Average snowfall days in May
Thessaloniki, Greece

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).

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Average sea temperature in May
Thessaloniki, Greece

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).

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Average daylight in May /
Average sunshine in May
Thessaloniki, Greece

Average daylight in May / Average sunshine in May - Thessaloniki, Greece
  • Average daylight in May: 14h and 3min

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 1min

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).

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Average sunshine days in May
Thessaloniki, Greece

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).

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Average UV index in May
Thessaloniki, Greece

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).

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Average cloud cover in May
Thessaloniki, Greece

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).

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Average visibility in May
Thessaloniki, Greece

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).

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Thessaloniki, Greece

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