May weather forecast and climate
Rethimno, Greece

Dusk in the Venetian Rethimno harbor in Greece
Dusk in the Venetian Rethimno harbor in Greece
The last month of the spring, May, is a warm month in Rethimno, Greece, with average temperature ranging between min 15°C (59°F) and max 24°C (75.2°F).

Temperature

In Rethimno, the average high-temperature in May marginally rises, from a pleasant 20°C (68°F) in April, to a moderately hot 24°C (75.2°F). In May, the average low-temperature is 15°C (59°F).

Rainfall

In Rethimno, during May, the rain falls for 3 days and regularly aggregates up to 14mm (0.55") of precipitation. Throughout the year, in Rethimno, Greece, there are 67 rainfall days, and 664mm (26.14") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature in Rethimno is 19.3°C (66.7°F).
Note: Swimming in 19.3°C (66.7°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In May, the average length of the day is 14h.

Sunshine

In May, the average sunshine is 10h.

UV index

The average daily maximum UV index is 9. A UV Index of 8 to 10 symbolizes a very high health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 9 in May interpret into the following advice:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in May in Rethimno?

The average high-temperature, in May, in Rethimno, Greece, is 24°C (75.2°F), while the average low-temperature is 15°C (59°F).

How many days does it rain in May in Rethimno?

In May, the rain falls for 3 days. Throughout May, 14mm (0.55") of precipitation is accumulated.

How cold is the water in May in Rethimno?

In Rethimno, the average seawater temperature in May is 19.3°C (66.7°F). Swimming in 19.3°C (66.7°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Rethimno have in May?

The average length of the day in May in Rethimno is 14h.

How long on average sun shines in May in Rethimno?

In Rethimno, the average sunshine in May is 10h.

What is the UV index reading in May in Rethimno?

The average daily maximum UV index in May is 9. A UV Index estimate of 8 to 10 represents a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in May - Rethimno, Greece
  • Average high temperature in May: 24°C

The warmest month (with the highest average high temperature) is July (30°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in May: 15°C

Months with the highest average low temperature are July and August (21°C).
The coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in May - Rethimno, Greece
  • Average rainfall in May: 14mm

The wettest month (with the highest rainfall) is January (142mm).
The driest months (with the least rainfall) are July and August (1mm).

Average rainfall days in May - Rethimno, Greece
  • Average rainfall days in May: 3 days

The month with the highest number of rainy days is December (13 days).
Months with the least rainy days are July and August (0 days).

Average sea temperature in May - Rethimno, Greece
  • Average sea temperature in May: 19.3°C

The best month for swimming (with the highest average sea temperature) is August (25.9°C).
The coldest month (with the lowest average sea temperature) is February (16.1°C).

Average daylight in May / Average sunshine in May - Rethimno, Greece
  • Average daylight in May: 14h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in May: 10h

Months with the most sunshine are June, July and August (Average sunshine: 12h).
Months with the least sunshine are January and December (Average sunshine: 4).

Average UV index in May - Rethimno, Greece
  • Average UV index in May: 9

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).