Climate - Lemnos (Greece)
Average weather, temperature, rainfall, sunshine hours
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Climate chart - 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 (1991-2020) | Month | Min (°C) | Max (°C) | Mean (°C) | Min (°F) | Max (°F) | Mean (°F) |
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| January | 4.1 | 10.8 | 7.4 | 39 | 51 | 45.4 |
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| February | 4.3 | 11.5 | 7.9 | 40 | 53 | 46.3 |
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| March | 6.1 | 13.7 | 9.9 | 43 | 57 | 49.8 |
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| April | 8.8 | 17.4 | 13.1 | 48 | 63 | 55.6 |
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| May | 13.1 | 22.7 | 17.9 | 56 | 73 | 64.2 |
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| June | 17.5 | 27.8 | 22.7 | 64 | 82 | 72.8 |
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| July | 20.7 | 30.3 | 25.5 | 69 | 86 | 77.8 |
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| August | 21.3 | 30.2 | 25.8 | 70 | 86 | 78.4 |
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| September | 16.9 | 25.8 | 21.4 | 62 | 79 | 70.4 |
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| October | 12.9 | 20.8 | 16.8 | 55 | 69 | 62.3 |
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| November | 8.9 | 16.5 | 12.7 | 48 | 62 | 54.8 |
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| December | 5.7 | 12.4 | 9.1 | 42 | 54 | 48.3 |
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| Year | 11.7 | 20.1 | 15.85 | 53.1 | 68.1 | 60.5 |
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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| Month | Millimeters | Inches | Days |
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| January | 65 | 2.6 | 10 |
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| February | 50 | 2 | 9 |
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| March | 50 | 2 | 9 |
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| April | 40 | 1.6 | 9 |
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| May | 25 | 1 | 7 |
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| June | 15 | 0.6 | 5 |
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| July | 9 | 0.4 | 2 |
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| August | 7 | 0.3 | 2 |
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| September | 25 | 1 | 3 |
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| October | 45 | 1.8 | 7 |
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| November | 75 | 3 | 10 |
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| December | 85 | 3.3 | 12 |
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| Year | 485 | 19.1 | 85 |
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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. In March 1987, the temperature dropped to -6 °C (21 °F).
Rainfall is quite frequent as well. 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 or exceeding 35 °C (95 °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.
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, there are both sunny periods and periods when the sky is cloudy. Here are the average daily sunshine hours.
Lemnos - Sunshine hours| Month | Average | Total |
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January | 4 | 125 | February | 5 | 140 | March | 6 | 185 | April | 8 | 240 | May | 9 | 280 | June | 11 | 330 | July | 12 | 370 | August | 11 | 340 | September | 9 | 270 | October | 7 | 215 | November | 5 | 150 | December | 4 | 125 | Year | 7.6 | 2775 |
The temperature of the sea is still cold in May and cool in June, while it becomes acceptable for swimming from July to September, and reaches a peak in August. Here are the average sea temperatures.
Lemnos - Sea temperature| Month | Celsius (°C) | Fahrenheit (°F) |
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January | 14 | 57 | February | 14 | 57 | March | 14 | 57 | April | 15 | 59 | May | 18 | 64 | June | 22 | 72 | July | 23 | 73 | August | 24 | 75 | September | 23 | 73 | October | 20 | 68 | November | 17 | 63 | December | 15 | 59 | Year | 18.3 | 64.9 |
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.
Lemnos - Weather by month
Based on the period 1991-2020
In January, the coldest month of the year, the weather in Lemnos is usually quite mild. The average temperature is of 7.4 °C (45 °F), with a minimum of 4.1 °C (39.3 °F) and a maximum of 10.8 °C (51.5 °F).
On the coldest nights of the month, the temperature usually drops to around -2 °C (28.5 °F). However, it dropped to -5.4 °C (22.3 °F) in January 2006.
On the warmest days of the month, the temperature usually reaches around 16.5 °C (62 °F). However, it reached 19.2 °C (66.6 °F) in January 2010.
Precipitation amounts to 65 mm (2.6 in), distributed over 10 days.
The day lasts on average 9 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.
In February, the weather in Lemnos is usually quite mild. The average temperature is of 7.9 °C (46 °F), with a minimum of 4.3 °C (39.8 °F) and a maximum of 11.5 °C (52.8 °F).
On the coldest nights of the month, the temperature usually drops to around -1.5 °C (29 °F). However, it dropped to -5.8 °C (21.6 °F) in February 1992.
On the warmest days of the month, the temperature usually reaches around 17.5 °C (63.5 °F). However, it reached 20 °C (68 °F) in February 2016.
Precipitation amounts to 50 mm (2 in), distributed over 9 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.
In March, the weather in Lemnos is usually mild. The average temperature is of 9.9 °C (50 °F), with a minimum of 6.1 °C (43 °F) and a maximum of 13.7 °C (56.7 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0 °C (32.5 °F). However, it dropped to -3 °C (26.6 °F) in March 1996.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 19 °C (66 °F). However, it reached 21.2 °C (70.2 °F) in March 2005.
Precipitation amounts to 50 mm (2 in), distributed over 9 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.
In April, the weather in Lemnos is usually mild. The average temperature is of 13.1 °C (56 °F), with a minimum of 8.8 °C (47.8 °F) and a maximum of 17.4 °C (63.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to -2 °C (28.4 °F) in April 2003.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 22.5 °C (72.5 °F). However, it reached 27 °C (80.6 °F) in April 2018.
Precipitation amounts to 40 mm (1.6 in), distributed over 9 days.
The day lasts on average 13 hours and 20 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 15 °C (59 °F). Therefore, the sea is cold for swimming.
In May, the weather in Lemnos is usually very mild. The average temperature is of 17.9 °C (64 °F), with a minimum of 13.1 °C (55.6 °F) and a maximum of 22.7 °C (72.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 8 °C (46 °F). However, it dropped to 3 °C (37.4 °F) in May 1995.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 28.5 °C (83 °F). However, it reached 31.4 °C (88.5 °F) in May 2001.
Precipitation amounts to 25 mm (1 in), distributed over 7 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 9 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 70%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 18 °C (64.5 °F). Therefore, the sea is cold for swimming.
In June, the weather in Lemnos is usually warm to hot. The average temperature is of 22.7 °C (73 °F), with a minimum of 17.5 °C (63.6 °F) and a maximum of 27.8 °C (82 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 12.5 °C (54.5 °F). However, it dropped to 9 °C (48.2 °F) in June 1997.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 36 °C (96.8 °F) in June 1991.
Precipitation amounts to 15 mm (0.6 in), distributed over 5 days.
The day lasts on average 15 hours and 0 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 11 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 63%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 22 °C (71.5 °F). Therefore, the sea is cool for swimming.
In July, the weather in Lemnos is usually warm to hot. The average temperature is of 25.5 °C (78 °F), with a minimum of 20.7 °C (69.2 °F) and a maximum of 30.3 °C (86.5 °F).
On the coldest nights of the month, the temperature usually drops to around 16.5 °C (61.5 °F). However, it dropped to 12.6 °C (54.7 °F) in July 1998.
On the warmest days of the month, the temperature usually reaches around 34 °C (93.5 °F). However, it reached 39.4 °C (102.9 °F) in July 2007.
Precipitation amounts to only 9 mm (0.4 in), distributed over 2 days.
The day lasts on average 14 hours and 40 minutes. So the days are long.
There are on average 12 hours of sunshine per day. So, the sun shines 82% of the time.
The average humidity is 59%.
The average wind speed is 15 kph (10 mph).
The average sea temperature is of 23 °C (73.5 °F). Therefore, the sea can be considered barely acceptable for swimming.
In August, the hottest month of the year, the weather in Lemnos is usually warm to hot. The average temperature is of 25.8 °C (78 °F), with a minimum of 21.3 °C (70.4 °F) and a maximum of 30.2 °C (86.4 °F).
On the coldest nights of the month, the temperature usually drops to around 16.5 °C (62 °F). However, it dropped to 12 °C (53.6 °F) in August 1995.
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 37.1 °C (98.8 °F) in August 2012.
Precipitation amounts to only 7 mm (0.3 in), distributed over 2 days.
The day lasts on average 13 hours and 40 minutes.
There are on average 11 hours of sunshine per day. So, the sun shines 80% of the time.
The average humidity is 60%.
The average wind speed is 17 kph (10 mph).
The average sea temperature is of 24 °C (75 °F). Therefore, the sea is warm enough for swimming.
In September, the weather in Lemnos is usually warm. The average temperature is of 21.4 °C (70 °F), with a minimum of 16.9 °C (62.3 °F) and a maximum of 25.8 °C (78.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 11 °C (52 °F). However, it dropped to 8 °C (46.4 °F) in September 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 35 °C (95 °F) in September 2015.
Precipitation amounts to 25 mm (1 in), distributed over 3 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 67%.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 23 °C (73.5 °F). Therefore, the sea can be considered barely acceptable for swimming.
In October, the weather in Lemnos is usually very mild. The average temperature is of 16.8 °C (62 °F), with a minimum of 12.9 °C (55.2 °F) and a maximum of 20.8 °C (69.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 2 °C (35.6 °F) in October 2011.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 26 °C (78.5 °F). However, it reached 32 °C (89.6 °F) in October 1991.
Precipitation amounts to 45 mm (1.8 in), distributed over 7 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 20 °C (68 °F). Therefore, the sea is very cool for swimming.
In November, the weather in Lemnos is usually mild. The average temperature is of 12.7 °C (55 °F), with a minimum of 8.9 °C (48 °F) and a maximum of 16.5 °C (61.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 2.5 °C (36 °F). However, it dropped to -2 °C (28.4 °F) in November 1995.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 21.5 °C (71 °F). However, it reached 25 °C (77 °F) in November 2008.
Precipitation amounts to 75 mm (3 in), distributed over 10 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 17 °C (62.5 °F). Therefore, the sea is cold for swimming.
In December, the weather in Lemnos is usually mild. The average temperature is of 9.1 °C (48 °F), with a minimum of 5.7 °C (42.2 °F) and a maximum of 12.4 °C (54.4 °F).
On the coldest nights of the month, the temperature usually drops to around -0.5 °C (31 °F). However, it dropped to -3.4 °C (25.9 °F) in December 1992.
On the warmest days of the month, the temperature usually reaches around 18 °C (64.5 °F). However, it reached 21 °C (69.8 °F) in December 2008.
Precipitation amounts to 85 mm (3.3 in), distributed over 12 days.
The day lasts on average 9 hours and 25 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 15 °C (59 °F). Therefore, the sea is cold for swimming.
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