Boulogne-sur-Mer weather and climate
Boulogne-sur-Mer weather and climate
Day
19 °C
Night
12 °C
Sea
14 °C
Precipitation
38 mm
in month
Rainy days
10 days
in month
Daylight
16 hours
average
Sunshine
7 hours
average
Humidity
81 %
Day
19 °C
Night
12 °C
Sea
14 °C
Precipitation
38 mm
in month
Rainy days
10 days
in month
Daylight
16 hours
average
Sunshine
7 hours
average
Humidity
81 %
Weather charts for Boulogne-sur-Mer
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Weather overview for Boulogne-sur-Mer
Weather overview
Boulogne-sur-Mer (France) in general has a mild climate. The day temperatures range from 7 °C (45 °F) in January to 21 °C (70 °F) in August. The driest month is July with just 9 days of rain, on the contrary, the month when it rains the most is November with 14 days of rain. Temperatures during the night go from 3 °C (37 °F) in February to 15 °C (58 °F) in August. Sea temperatures are in the following range: 7 °C (45 °F) in March to 17 °C (63 °F) in August.
January weather
The minimum of the day temperature can be noticed, the value of this measure is 7 °C (45 °F) in Boulogne-sur-Mer, while the sea temperature continues to descent, with its value of 9 °C (48 °F). The descent of the number of rainy days can be observed, with its value of 13 days. The night temperature continues to descent, the value of this measure is 3 °C (37 °F). The maximum of the wind speed is observable, the value of this measure is 7. The maximum of the humidity can be noticed, with its value being 90 %.
February weather
The descent of the sea temperature can be observed, with its value being 8 °C (46 °F) in Boulogne-sur-Mer, while the minimum of the night temperature is observable, the value of this measure is 3 °C (37 °F). The descent of the number of rainy days can be observed, with its value of 11 days, while the rainfall amount descent's start could be observed, the value of this measure is 46 mm (1.82 in). The beginning of the rise of the number of sun hours (without clouds) could be noticed, with its value of 3 hours.
March weather
The sea temperature is on its minimum, the value of this measure is 7 °C (45 °F) in Boulogne-sur-Mer, while the day temperature rise's start could be observed in this month. The descent of the rainfall amount can be observed, with its value of 39 mm (1.53 in). The night temperature starts to rise, the value of this measure is 4 °C (40 °F). The number of sun hours (without clouds) rises similarly to the previous month, the value of this measure is 4 hours.
April weather
The sea temperature rise's start could be observed, the value of this measure is 9 °C (48 °F) in Boulogne-sur-Mer, while the rise of the day temperature can be observed, with its value being 13 °C (55 °F). The rainfall amount reaches its minimum, with its value of 36 mm (1.40 in). The rise of the night temperature can be observed. The rise of the number of sun hours (without clouds) can be observed, its value is 6 hours.
May weather
The sea temperature continues to rise in Boulogne-sur-Mer, and the day temperature continues to rise too, its value is 17 °C (62 °F). The night temperature rises similarly to the previous month, with its value being 9 °C (49 °F). The rise of the number of sun hours (without clouds) can be observed, with its value of 7 hours. The rainfall amount rise's start could be observed in this month.
June weather
The sea temperature continues to rise, the value of this measure is 14 °C (56 °F) in Boulogne-sur-Mer, and the rise of the day temperature can be observed as well, with its value of 19 °C (65 °F). The rise of the night temperature can be observed, its value is 12 °C (53 °F). The maximum of the number of sun hours (without clouds) can be noticed, its value is 7 hours. The minimum of the wind speed can be noticed, with its value being 5. The day length is on its maximum, the value of this measure is 16 hours.
July weather
The rise of the day temperature can be observed, with its value being 21 °C (70 °F) in Boulogne-sur-Mer, and the rise of the sea temperature can be observed as well, its value is 16 °C (61 °F). The tourist season is about to start this month. The minimum of the number of rainy days can be noticed, with its value being 9 days, while the rainfall amount rise's start could be observed, its value is 46 mm (1.82 in). The rise of the night temperature can be observed, the value of this measure is 14 °C (58 °F).
August weather
The tourist season is taking place this month in Boulogne-sur-Mer. The sea temperature reaches its maximum, with its value being 17 °C (63 °F), and the maximum of the day temperature is observable as well, the value of this measure is 21 °C (70 °F). The beginning of the rise of the number of rainy days could be noticed, with its value of 9 days, while the rainfall amount rises similarly to the previous month, with its value being 53 mm (2.10 in). The maximum of the night temperature can be noticed, its value is 15 °C (58 °F).
September weather
The beginning of the descent of the day temperature could be noticed in Boulogne-sur-Mer, and the night temperature descent's start could be observed too in September. The number of rainy days rises similarly to the previous month, with its value being 10 days. The beginning of the descent of the number of sun hours (without clouds) could be noticed in September.
October weather
The day temperature descents similarly to the previous month, its value is 15 °C (59 °F) in Boulogne-sur-Mer, while the sea temperature starts to descent in this month. The rise of the number of rainy days can be observed, with its value being 13 days, while the rainfall amount starts to rise in this month. The night temperature descents similarly to the previous month, with its value being 10 °C (50 °F). The number of sun hours (without clouds) continues to descent, its value is 4 hours.
November weather
The sea temperature continues to descent, the value of this measure is 13 °C (55 °F) in Boulogne-sur-Mer, and the day temperature descents similarly to the previous month too, with its value being 11 °C (52 °F). The number of rainy days reaches its maximum, its value is 14 days, and the maximum of the rainfall amount can be noticed as well, with its value of 85 mm (3.35 in). The night temperature continues to descent, with its value of 6 °C (43 °F). The number of sun hours (without clouds) continues to descent, with its value of 2 hours.
December weather
The day temperature descents similarly to the previous month, with its value being 8 °C (46 °F) in Boulogne-sur-Mer, and the descent of the sea temperature can be observed too, with its value of 11 °C (51 °F). The beginning of the descent of the number of rainy days could be noticed, with its value of 14 days, and the rainfall amount descent's start could be observed too, the value of this measure is 62 mm (2.45 in). The minimum of the number of sun hours (without clouds) can be noticed, with its value of 2 hours. The minimum of the day length can be noticed, the value of this measure is 8 hours.
FAQs
How many rainy days can I expect in Boulogne-sur-Mer in May?
There are 10 days, which are rainy in Boulogne-sur-Mer in May, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.3 days of the week, or in general - 33 % days.
Are there good conditions to visit in Boulogne-sur-Mer in June?
Boulogne-sur-Mer can be visited in June - the weather will be moderate. The temperature of 12 °C (53 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What temperature can I expect during the day in Boulogne-sur-Mer in July?
In Boulogne-sur-Mer in July, the average daily temperatures will be 21 °C (70 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
Is August part of the wet season in Boulogne-sur-Mer?
No, there is no wet season in August in Boulogne-sur-Mer - you can expect 9 days of rain during the month.
What is the sea temperature in Boulogne-sur-Mer in September?
The temperature of the sea in September in Boulogne-sur-Mer is 17 °C (63 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.