Climate - Constanta (Romania)

The climate of Constanta is slightly continental, with cold winters and hot summers.
The city is located in south-eastern Romania, on the Black Sea coast.
Just to the north we find the Siutghiol lake, a lagoon separated from the sea by a long strip of sand, where we find the tourist resort of Mamaia.
The climate is slightly milder than in other cities in Romania, however, the winter is cold, because the Black Sea is not very large, and in winter it cools down a lot under the influence of cold air masses from Russia. During the coldest winters, the sea can even freeze.
In these situations, there is a delay in the spring warming, so it is still cold in March, but sometimes even in April.
On the coldest nights of the year, the temperature typically drops below -10 °C (14 °F). The record is -18 °C (0 °F), recorded in January 2010.
When the atmosphere is stable, fog can form.
The summer is warm and sunny, with rare rains, so it resembles the Mediterranean summer.
While it is generally not too hot, there can be very hot periods, in which the temperature reach or exceed 35 °C (95 °F). The record heat is 38.5 °C (101.5 °F), recorded in July 2007.

Best Time

The best time to go to Constanta for a beach holiday, is the summer, especially in July and August, when the temperatures are higher. In June, it's often a bit cooler, so it's better to bring a sweatshirt for the evening. Usually, the weather is still good in the first half of September, although it starts to be a bit cool at night, with minimum temperatures about 15 °C (59 °F).

Constanta - Climate data

In Constanta, the average temperature of the coldest month (January) is of 1.7 °C (35.1 °F), that of the warmest month (August) is of 23.8 °C (74.9 °F). Here are the average temperatures.
In Constanta, precipitation amounts to 480 millimeters (18.9 inches) per year: it is therefore quite scarce. It ranges from 25 mm (1 in) in the driest month (February) to 45 mm (1.8 in) in the wettest ones (May, June, July, September, October, November) Here is the average precipitation.
At Constanta, the sea temperature ranges from 6.5 °C (44 °F) in February to 24.5 °C (76 °F) in August. Here are the average sea temperatures.
In Constanta, there are on average around 2300 sunshine hours per year. Here are the average hours of sunshine per day.

Constanta - Weather by month

Based on the period 1991-2020

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In January, the coldest month of the year, the weather in Constanta is usually cold. The average temperature is of 1.7 °C (35 °F), with a minimum of -1.2 °C (29.8 °F) and a maximum of 4.6 °C (40.3 °F).
On the coldest nights of the month, the temperature usually drops to around -10.5 °C (13.5 °F). However, it dropped to -17.8 °C (0 °F) in January 2010.
On the warmest days of the month, the temperature usually reaches around 13.5 °C (56.5 °F). However, it reached 18.3 °C (64.9 °F) in January 2007.
Precipitation amounts to 35 mm (1.4 in), distributed over 6 days.
The day lasts on average 9 hours and 20 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 85%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 7.5 °C (45 °F). Therefore, the sea is very cold for swimming.

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In February, the weather in Constanta is usually cold. The average temperature is of 3.2 °C (38 °F), with a minimum of 0 °C (32 °F) and a maximum of 6.4 °C (43.5 °F).
On the coldest nights of the month, the temperature usually drops to around -8 °C (17 °F). However, it dropped to -15.7 °C (3.7 °F) in February 2012.
On the warmest days of the month, the temperature usually reaches around 16 °C (61 °F). However, it reached 24.5 °C (76.1 °F) in February 1995.
Precipitation amounts to 25 mm (1 in), distributed over 5 days.
The day lasts on average 10 hours and 30 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 6.5 °C (43.5 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Constanta is usually quite mild. The average temperature is of 6.7 °C (44 °F), with a minimum of 3.3 °C (37.9 °F) and a maximum of 10.1 °C (50.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -2.5 °C (27 °F). However, it dropped to -11.8 °C (10.8 °F) in March 2018.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 20 °C (68 °F). However, it reached 27.9 °C (82.2 °F) in March 2001.
Precipitation amounts to 40 mm (1.6 in), distributed over 6 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 38% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is 25 kph (16 mph).
The average sea temperature is of 7 °C (44.5 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Constanta is usually mild. The average temperature is of 11.2 °C (52 °F), with a minimum of 7.8 °C (46 °F) and a maximum of 14.7 °C (58.5 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -1.3 °C (29.7 °F) in April 1995.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 23 °C (73 °F). However, it reached 30.6 °C (87.1 °F) in April 1998.
Precipitation amounts to 35 mm (1.4 in), distributed over 5 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 9.5 °C (49.5 °F). Therefore, the sea is very cold for swimming.

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In May, the weather in Constanta is usually very mild. The average temperature is of 16.9 °C (62 °F), with a minimum of 13.2 °C (55.8 °F) and a maximum of 20.6 °C (69.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 8 °C (46.5 °F). However, it dropped to 3.4 °C (38.1 °F) in May 2000.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 28 °C (83 °F). However, it reached 33 °C (91.4 °F) in May 1993.
Precipitation amounts to 45 mm (1.8 in), distributed over 6 days.
The day lasts on average 14 hours and 50 minutes. So the days are long.
There are on average 9 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 15 °C (59.5 °F). Therefore, the sea is cold for swimming.

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In June, the weather in Constanta is usually warm. The average temperature is of 21.5 °C (71 °F), with a minimum of 17.6 °C (63.7 °F) and a maximum of 25.4 °C (77.7 °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 8.9 °C (48 °F) in June 1997.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 34.1 °C (93.4 °F) in June 2012.
Precipitation amounts to 45 mm (1.8 in), distributed over 5 days.
The day lasts on average 15 hours and 30 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 9.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 20.5 °C (69 °F). Therefore, the sea is cool for swimming.

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In July, the weather in Constanta is usually warm to hot and muggy. The average temperature is of 23.8 °C (75 °F), with a minimum of 19.8 °C (67.6 °F) and a maximum of 27.8 °C (82 °F).
On the coldest nights of the month, the temperature usually drops to around 16 °C (61 °F). However, it dropped to 12 °C (53.6 °F) in July 1993.
On the warmest days of the month, the temperature usually reaches around 32.5 °C (90.5 °F). However, it reached 38.5 °C (101.3 °F) in July 2007.
Precipitation amounts to 45 mm (1.8 in), distributed over 4 days.
The day lasts on average 15 hours and 5 minutes. So the days are long.
There are on average 10.5 hours of sunshine per day. So, the sun shines 70% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 23.5 °C (74.5 °F). Therefore, the sea can be considered barely acceptable for swimming.

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In August, the warmest month of the year, the weather in Constanta is usually warm to hot and muggy. The average temperature is of 23.8 °C (75 °F), with a minimum of 19.9 °C (67.8 °F) and a maximum of 27.8 °C (82 °F).
On the coldest nights of the month, the temperature usually drops to around 15 °C (58.5 °F). However, it dropped to 10.8 °C (51.4 °F) in August 1993.
On the warmest days of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 37.5 °C (99.5 °F) in August 2006.
Precipitation amounts to 40 mm (1.6 in), distributed over 3 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 71% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 24.5 °C (76.5 °F). Therefore, the sea is warm enough for swimming.

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In September, the weather in Constanta is usually warm. The average temperature is of 19.4 °C (67 °F), with a minimum of 15.7 °C (60.3 °F) and a maximum of 23.2 °C (73.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10 °C (50 °F). However, it dropped to 5.5 °C (41.9 °F) in September 2018.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29.5 °C (84.5 °F). However, it reached 33.5 °C (92.3 °F) in September 2012.
Precipitation amounts to 45 mm (1.8 in), distributed over 4 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 22 °C (71 °F). Therefore, the sea is cool for swimming.

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In October, the weather in Constanta is usually mild. The average temperature is of 14.2 °C (58 °F), with a minimum of 10.8 °C (51.4 °F) and a maximum of 17.6 °C (63.7 °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 -3 °C (26.6 °F) in October 1997.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 25 °C (77 °F). However, it reached 30 °C (86 °F) in October 1997.
Precipitation amounts to 45 mm (1.8 in), distributed over 5 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 27 kph (17 mph).
The average sea temperature is of 17.5 °C (63.5 °F). Therefore, the sea is cold for swimming.

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In November, the weather in Constanta is usually mild. The average temperature is of 8.8 °C (48 °F), with a minimum of 5.8 °C (42.4 °F) and a maximum of 11.9 °C (53.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1.5 °C (29 °F). However, it dropped to -7.9 °C (17.8 °F) in November 1999.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 20.5 °C (69 °F). However, it reached 27 °C (80.6 °F) in November 2001.
Precipitation amounts to 45 mm (1.8 in), distributed over 6 days.
The day lasts on average 9 hours and 35 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 13 °C (55.5 °F). Therefore, the sea is very cold for swimming.

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In December, the weather in Constanta is usually cold. The average temperature is of 3.6 °C (38 °F), with a minimum of 0.6 °C (33.1 °F) and a maximum of 6.5 °C (43.7 °F).
On the coldest nights of the month, the temperature usually drops to around -7.5 °C (18.5 °F). However, it dropped to -13.8 °C (7.2 °F) in December 1996.
On the warmest days of the month, the temperature usually reaches around 15 °C (59 °F). However, it reached 19.7 °C (67.5 °F) in December 2004.
Precipitation amounts to 40 mm (1.6 in), distributed over 6 days.
The day lasts on average 8 hours and 55 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 2.5 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 9.5 °C (49 °F). Therefore, the sea is very cold for swimming.