Position of Lemnos

The climate of Lemnos, an island of the Northern Aegean Sea, is Mediterranean, with relatively mild, rainy winters and hot, sunny summers. The island is not as warm as the southern Greek islands, it is windy, and in winter, it is subject to cold air outbreaks from the Balkan Peninsula.
Here are the average temperatures.
Lemnos - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)446913172020171396
Max (°C)111113172227292925201612
Min (°F)393943485563686863554843
Max (°F)525255637281848477686154

Precipitation follows the Mediterranean pattern, so it's more frequent between November and March, and it's not abundant, in fact, it does not reach 500 millimeters (20 inches) per year. In summer, the rains are very rare, in the form of short downpour or thunderstorm. No wonder the island's landscape is arid.
Here is the average precipitation.
Lemnos - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)6550504025159725457585485
Prec.(in)2.6221.610.60.40.311.833.319.1
Days10999752237101285

Winter, from December to mid-March, is not so mild: there are many days with highs below 10 °C (50 °F) and sometimes even below 5 °C (41 °F), and with a moderate or even strong wind. Every now and then, it can get very cold and it can even snow, and there may be slight frosts at night. Rainfall is quite frequent too. There are also mild days, with highs around 15/18 °C (59/64 °F).

Spring, from mid-March to May, is mild, but with a few periods a bit cold, windy and rainy, which gradually become less frequent.

Summer, from June to August, is hot and sunny, with rare rains. Typically, the maximum temperatures hover around 28/32 °C (82/90 °F), and there's a wind from the north, the Meltemi, which blows with a certain intensity in periods of a few days, though less than in the Cyclades. However, there may be periods of intense heat, with maximum temperatures reaching 34/36 °C (93/97 °F).

Autumn, from September to November, is pleasantly warm at first, then gradually becomes milder. The rains gradually become more frequent, although there are entire weeks without rain still in October. In November, the first days a bit cold and windy begin to occur, and sometimes also in October.

Myrina

The amount of sunshine in Lemnos is very good in summer, and also in May, when clear skies prevail, while in the rest of the year, it is not so remarkable, since there are several cloudy periods.
Here are the average daily sunshine hours in nearby Lesbos.
Lesbos - Sunshine
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Hours55781013141311854

The temperature of the sea is still cold in May and cool in June, when it's around 22 °C (72 °F), while it becomes acceptable for swimming in July and September, around 23 °C (73 °F), and reaches a peak in August of 24 °C (75 °F). Here are the average sea temperatures.
Lemnos - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)141414151822232423201715
Temp (°F)575757596472737573686359

Best Time


The best time to travel to Lemnos for a beach holiday is the summer, from June to August. In June, and sometimes in early July, there may be some cool evenings, so it's better to bring a sweatshirt for the evening.
In May, not only the sea is cold, but also some days can be a bit cool, with highs below 20 °C (68 °F), especially in the first part of the month.
If you want to go on excursions on the island, you can choose May, June and September.

Back to the North Aegean Islands.