Climate - Fehmarn (Germany)

The climate of Fehmarn is sub-oceanic, humid and rainy, influenced by currents from the Atlantic and the North Sea, with cold, gray winters and mild or pleasantly warm summers.
The island is located in northern Germany, a short distance from the Schleswig-Holstein coast, and is connected to the mainland by a bridge.
The wind blows frequently, and can be intense, especially from November to March. Not surprisingly, windsurfing and kitesurfing are practiced here.
The average temperature of the coldest month (January) is of 2 °C (35.5 °F), that of the warmest month (August) is of 18.2 °C (64.8 °F). Here are the average temperatures.

Precipitation amounts to 555 millimeters (22 inches) per year: so, it is at an intermediate level. It ranges from 30 mm (1.2 in) in the driest months (February, April) to 65 mm (2.6 in) in the wettest (August). Here is the average precipitation.

Although the winter is not very cold for the latitude, it is often humid, windy and rainy. There may be relatively mild periods, when Atlantic currents prevail, and other colder periods, when the temperature drops below freezing and it can snow.
Sometimes, there can be cold spells, in which temperatures can drop as low as -10 °C (14 °F) or even below. In fact, Scandinavian high pressure systems can reverse the normal circulation and bring very cold periods, which in the past were more frequent. The cold record is -18.5 °C (-1.5 °F), set in February 1972. More recently, the temperature dropped to -14.5 °C (6 °F) in March 1986 and January 1987, and to -11.5 °C (11.5 °F) in February 2012.
Even in spring, until April or the first half of May, there is often cold and unstable weather. In April, there may still be some snow showers.
In summer, the temperatures are generally pleasant and lend themselves to outdoor activities, although there are cool and rainy periods, and sometimes thunderstorms can break out.
At times, hot periods can occur, generally of short duration, which in recent years are becoming more frequent due to global warming, and in which the temperature can exceed 28 °C (82 °F). However, given the latitude and the short distance from the sea, the heat is less intense and lasting than in the central-southern German plains. On the hottest days of the year, the temperature typically reaches 29/30 °C (84/86 °F). The highest record is 34 °C (93.2 °F) and was set in August 2022.



On average, there are around 1,840 sunshine hours per year. Here are the average sunshine hours per day.

The sea temperature ranges between 2 °C (35 °F) and 18 °C (65 °F). So, it never becomes warm for swimming (except for tourists from northern Europe). Here are the average sea temperatures.

Best Time

The best time to visit Fehmarn runs from mid-May to mid-September, since it is the warmest and sunniest period of the year. Sometimes, it can be hot in July and August, while in other circumstances, nights can be cool even in these months, so it can be useful to bring a sweatshirt or sweater and a light jacket.

Fehmarn - Weather by month

Based on the period 1991-2020

---

In January, the coldest month of the year, the weather in Fehmarn is usually cold. The average temperature is of 2 °C (36 °F), with a minimum of 0.4 °C (32.7 °F) and a maximum of 3.6 °C (38.5 °F).
On the coldest nights of the month, the temperature usually drops to around -6 °C (21 °F). However, it dropped to -11.4 °C (11.5 °F) in January 1997.
On the warmest days of the month, the temperature usually reaches around 8.5 °C (47.5 °F). However, it reached 12.9 °C (55.2 °F) in January 2020.
Precipitation amounts to 45 mm (1.8 in), distributed over 10 days.
The day lasts on average 8 hours and 0 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 18% of the time.
The average humidity is 93%. Hence, the air is normally humid.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 2.5 °C (36.5 °F). Therefore, the sea is very cold for swimming.

---

In February, the weather in Fehmarn is usually cold. The average temperature is of 2.2 °C (36 °F), with a minimum of 0.5 °C (32.9 °F) and a maximum of 4 °C (39.2 °F).
On the coldest nights of the month, the temperature usually drops to around -4.5 °C (23.5 °F). However, it dropped to -11.5 °C (11.3 °F) in February 2012.
On the warmest days of the month, the temperature usually reaches around 9 °C (48.5 °F). However, it reached 14.2 °C (57.6 °F) in February 2002.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 25% of the time.
The average humidity is 90%. Hence, the air is normally humid.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 2 °C (35.5 °F). Therefore, the sea is very cold for swimming.

---

In March, the weather in Fehmarn is usually quite cold. The average temperature is of 4.2 °C (39 °F), with a minimum of 1.9 °C (35.4 °F) and a maximum of 6.4 °C (43.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -9.9 °C (14.2 °F) in March 2006.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 14 °C (57 °F). However, it reached 19.2 °C (66.6 °F) in March 2017.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 2.5 °C (37 °F). Therefore, the sea is very cold for swimming.

---

In April, the weather in Fehmarn is usually quite mild. The average temperature is of 7.8 °C (46 °F), with a minimum of 4.8 °C (40.6 °F) and a maximum of 10.9 °C (51.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0.5 °C (32.5 °F). However, it dropped to -2.1 °C (28.2 °F) in April 2003.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 18.5 °C (65 °F). However, it reached 25.2 °C (77.4 °F) in April 2018.
Precipitation amounts to 30 mm (1.2 in), distributed over 7 days.
The day lasts on average 14 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 6 °C (42.5 °F). Therefore, the sea is very cold for swimming.

---

In May, the weather in Fehmarn is usually mild. The average temperature is of 12.2 °C (54 °F), with a minimum of 9 °C (48.2 °F) and a maximum of 15.3 °C (59.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 4 °C (39 °F). However, it dropped to 1 °C (33.8 °F) in May 1997.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 22.5 °C (73 °F). However, it reached 29.7 °C (85.5 °F) in May 2005.
Precipitation amounts to 45 mm (1.8 in), distributed over 8 days.
The day lasts on average 16 hours and 5 minutes. So the days are long.
There are on average 8.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 10.5 °C (50.5 °F). Therefore, the sea is very cold for swimming.

---

In June, the weather in Fehmarn is usually very mild. The average temperature is of 15.6 °C (60 °F), with a minimum of 12.6 °C (54.7 °F) and a maximum of 18.7 °C (65.7 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 8.5 °C (47 °F). However, it dropped to 4.7 °C (40.5 °F) in June 2012.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26 °C (79 °F). However, it reached 32.6 °C (90.7 °F) in June 2019.
Precipitation amounts to 55 mm (2.2 in), distributed over 9 days.
The day lasts on average 17 hours and 10 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 8.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 14.5 °C (58.5 °F). Therefore, the sea is very cold for swimming.

---

In July, the weather in Fehmarn is usually very mild. The average temperature is of 18.0 °C (64 °F), with a minimum of 14.9 °C (58.8 °F) and a maximum of 21 °C (69.8 °F).
On the coldest nights of the month, the temperature usually drops to around 11.5 °C (52.5 °F). However, it dropped to 9.4 °C (48.9 °F) in July 1998.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81 °F). However, it reached 31.9 °C (89.4 °F) in July 2018.
Precipitation amounts to 55 mm (2.2 in), distributed over 9 days.
The day lasts on average 16 hours and 35 minutes. So the days are long.
There are on average 8.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 17.5 °C (63.5 °F). Therefore, the sea is cold for swimming.

---

In August, the warmest month of the year, the weather in Fehmarn is usually warm. The average temperature is of 18.2 °C (65 °F), with a minimum of 15.2 °C (59.4 °F) and a maximum of 21.3 °C (70.3 °F).
On the coldest nights of the month, the temperature usually drops to around 11 °C (52 °F). However, it dropped to 7.6 °C (45.7 °F) in August 2000.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (82 °F). However, it reached 32.4 °C (90.3 °F) in August 2009.
Precipitation amounts to 65 mm (2.6 in), distributed over 10 days.
The day lasts on average 14 hours and 50 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 18 °C (64.5 °F). Therefore, the sea is cold for swimming.

---

In September, the weather in Fehmarn is usually very mild. The average temperature is of 15.2 °C (59 °F), with a minimum of 12.7 °C (54.9 °F) and a maximum of 17.8 °C (64 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 8.5 °C (47 °F). However, it dropped to 6.4 °C (43.5 °F) in September 2000.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 24 °C (75.5 °F). However, it reached 29.5 °C (85.1 °F) in September 2009.
Precipitation amounts to 55 mm (2.2 in), distributed over 9 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 16 °C (60.5 °F). Therefore, the sea is cold for swimming.

---

In October, the weather in Fehmarn is usually mild. The average temperature is of 10.9 °C (52 °F), with a minimum of 8.8 °C (47.8 °F) and a maximum of 13 °C (55.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 3.5 °C (38.5 °F). However, it dropped to -1 °C (30.2 °F) in October 1997.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 18.5 °C (65 °F). However, it reached 24.9 °C (76.8 °F) in October 2018.
Precipitation amounts to 50 mm (2 in), distributed over 10 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 12 °C (54 °F). Therefore, the sea is very cold for swimming.

---

In November, the weather in Fehmarn is usually quite mild. The average temperature is of 6.6 °C (44 °F), with a minimum of 4.9 °C (40.8 °F) and a maximum of 8.2 °C (46.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -0.5 °C (30.5 °F). However, it dropped to -6.5 °C (20.3 °F) in November 1998.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 13 °C (56 °F). However, it reached 17.1 °C (62.8 °F) in November 2020.
Precipitation amounts to 50 mm (2 in), distributed over 10 days.
The day lasts on average 8 hours and 25 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 20% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 8.5 °C (47 °F). Therefore, the sea is very cold for swimming.

---

In December, the weather in Fehmarn is usually cold. The average temperature is of 3.5 °C (38 °F), with a minimum of 1.9 °C (35.4 °F) and a maximum of 5.1 °C (41.2 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -10.2 °C (13.6 °F) in December 2010.
On the warmest days of the month, the temperature usually reaches around 9.5 °C (49 °F). However, it reached 13.9 °C (57 °F) in December 2006.
Precipitation amounts to 45 mm (1.8 in), distributed over 10 days.
The day lasts on average 7 hours and 25 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There is an average of 1 hour of sunshine per day. So, the sun shines 15% of the time.
The average humidity is 92%. Hence, the air is normally humid.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 4.5 °C (39.5 °F). Therefore, the sea is very cold for swimming.