Grande-Synthe monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Grande-Synthe

Grande-Synthe average temperature chart (Celsius) Grande-Synthe average temperature chart (Fahrenheit)
Average monthly temperatures in Grande-Synthe (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.9 6.4 9.1 11.7 15.5 18.5 20.4 20.8 18.6 14.8 9.7 6.9
°F 42.6 43.6 48.4 53 60 65.2 68.8 69.4 65.5 58.6 49.5 44.4

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.

Grande-Synthe monthly rainfall chart (mm) Grande-Synthe monthly rainfall chart (inches)
Average monthly rainfall in Grande-Synthe (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 57 39 53 45 49 54 55 51 64 71 81 59
inches 2.2 1.5 2.1 1.8 1.9 2.1 2.2 2 2.5 2.8 3.2 2.3
Rainy days 19 14 17 16 16 14 14 14 15 18 20 18

Average annual rainfall in Grande-Synthe: 731.40025mm (288 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Grande-Synthe

Grande-Synthe average daily sunshine chart
Average daily sunshine Grande-Synthe
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 3.3 4.5 6 7.3 7.8 7.5 7.8 5.6 4.3 2.8 1.8

Day / night temperatures

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

Grande-Synthe average minimum / maximum temperatures (Celsius) Grande-Synthe average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Grande-Synthe (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.2 1.1 2.5 4.5 7.9 10.9 12.7 12.7 10.8 7.9 4.2 2.2
Max °C 6 6.6 9.3 11.9 15.7 18.7 20.6 21 18.8 15 9.9 7
Min °F 34.1 33.9 36.5 40.2 46.2 51.5 54.9 54.8 51.4 46.3 39.6 35.9
Max °F 38.4 38.9 42.6 46.8 53.2 58.6 62 62.3 58.6 52.6 44.7 40.2

Sea temperature

The graph below shows the average sea temperature.

Grande-Synthe average sea temperature chart (Celsius) Grande-Synthe average sea temperature chart (Fahrenheit)
Average sea temperature around Grande-Synthe in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.7 6.8 7 8.6 11 13.7 16.2 17.8 17.4 15.3 12.3 9.6
°F 45.9 44.2 44.5 47.4 51.7 56.6 61.2 64.1 63.3 59.5 54.2 49.2

Wind speed

The graph below shows the average wind speed.

Grande-Synthe average winspeed by month (km/h) Grande-Synthe average winspeed by month (mph)
Average wind speed in Grande-Synthe (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 19 19 19 17 16 15 16 16 17 20 20
mph 12 12 12 12 11 10 10 10 10 11 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.

Grande-Synthe relative humidity averages
Average relative humidity in Grande-Synthe
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
89% 86% 83% 79% 80% 81% 81% 81% 82% 85% 88% 90%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Grande-Synthe weather stats

Grande-Synthe weather statistics
Hottest month: August 20.8°C 69.4°F
Driest month: February 39mm 1.5ins
Sunniest month: August 7.8hrs
Coldest month: January 5.9°C 42.6°F
Wettest month: November 81mm 3.2ins
Warmest sea: August 17.8°C 64°F
Map showing location of Grande-Synthe (51.0154, 2.29975) Grande-Synthe map pin © Google

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