Boulogne-sur-Mer monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Boulogne-sur-Mer

Boulogne-sur-Mer average temperature chart (Celsius) Boulogne-sur-Mer average temperature chart (Fahrenheit)
Average monthly temperatures in Boulogne-sur-Mer (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.2 6.4 8.8 11.2 15 17.9 20 20.3 18.2 14.6 9.9 7.2
°F 43.1 43.6 47.8 52.2 59 64.3 68.1 68.6 64.7 58.3 49.9 45

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Boulogne-sur-Mer monthly rainfall chart (mm) Boulogne-sur-Mer monthly rainfall chart (inches)
Average monthly rainfall in Boulogne-sur-Mer (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 67 47 58 49 50 54 54 52 68 81 93 70
inches 2.6 1.8 2.3 1.9 2 2.1 2.1 2.1 2.7 3.2 3.6 2.7
Rainy days 18 14 16 15 14 12 12 12 13 15 18 16

Average annual rainfall in Boulogne-sur-Mer: 795.133mm (313 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Boulogne-sur-Mer

Boulogne-sur-Mer average daily sunshine chart
Average daily sunshine Boulogne-sur-Mer
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.1 3.2 4.4 6 7.5 8 7.5 7.6 5.8 4.4 2.9 2

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Boulogne-sur-Mer average minimum / maximum temperatures (Celsius) Boulogne-sur-Mer average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Boulogne-sur-Mer (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.7 1.7 2.9 4.8 8.1 10.9 13 13.1 11.3 8.7 4.8 2.7
Max °C 6.3 6.6 9 11.4 15.2 18.1 20.2 20.5 18.4 14.8 10.1 7.4
Min °F 35.1 35 37.1 40.6 46.5 51.6 55.4 55.6 52.3 47.6 40.6 36.8
Max °F 39.2 39.4 42.6 46.6 52.9 58.1 61.9 62.2 58.6 53.1 45.3 41

Sea temperature

The graph below shows the average sea temperature.

Boulogne-sur-Mer average sea temperature chart (Celsius) Boulogne-sur-Mer average sea temperature chart (Fahrenheit)
Average sea temperature around Boulogne-sur-Mer in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.8 7.8 7.9 9.2 11.2 13.6 15.9 17.5 17.4 15.7 13.1 10.5
°F 47.8 46 46.1 48.6 52.1 56.5 60.6 63.6 63.3 60.2 55.5 50.9

Wind speed

The graph below shows the average wind speed.

Boulogne-sur-Mer average winspeed by month (km/h) Boulogne-sur-Mer average winspeed by month (mph)
Average wind speed in Boulogne-sur-Mer (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 19 18 17 16 15 15 16 16 19 19
mph 12 12 12 11 11 10 9 9 10 10 12 12

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Boulogne-sur-Mer relative humidity averages
Average relative humidity in Boulogne-sur-Mer
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 87% 84% 81% 81% 81% 80% 80% 83% 86% 89% 90%

Other monthly averages

UV index Best time to go?

Boulogne-sur-Mer weather stats

Boulogne-sur-Mer weather statistics
Hottest month: August 20.3°C 68.5°F
Driest month: February 47mm 1.9ins
Sunniest month: August 7.6hrs
Coldest month: January 6.2°C 43.2°F
Wettest month: November 93mm 3.7ins
Warmest sea: August 17.5°C 63.5°F
Map showing location of Boulogne-sur-Mer (50.71667, 1.61667) Boulogne-sur-Mer map pin © Google

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