Climate and monthly weather forecastGrande-Synthe, France
Climate and monthly weather forecast
Weather in January
January, the same as December, in Grande-Synthe, France, is a frosty winter month, with an average temperature fluctuating between 3.6°C (38.5°F) and 6.8°C (44.2°F). Grande-Synthe records the coldest temperatures in January, averaging a high of 6.8°C (44.2°F) and a low of 3.6°C (38.5°F). Weather in January »Weather in February
February, the last month of the winter in Grande-Synthe, is another chilly month, with an average temperature ranging between min 3.7°C (38.7°F) and max 7.1°C (44.8°F). Grande-Synthe marks the start of February with an average high-temperature of a still frosty 7.1°C (44.8°F), hinting at a slight fluctuation from January's 6.8°C (44.2°F). Weather in February »Weather in March
The first month of the spring, March, is also a frosty month in Grande-Synthe, France, with temperature in the range of an average low of 4.8°C (40.6°F) and an average high of 9.7°C (49.5°F). The arrival of March sees a recorded average high-temperature of a still chilly 9.7°C (49.5°F), showing little divergence from the previous month's conditions. Weather in March »Weather in April
April is a moderate spring month in Grande-Synthe, France, with temperature in the range of an average high of 13°C (55.4°F) and an average low of 7.1°C (44.8°F). With the beginning of April, Grande-Synthe's average high-temperature sees a minor increase, transitioning from a chilly 9.7°C (49.5°F) in March to a moderate 13°C (55.4°F). Weather in April »Weather in May
The last month of the spring, May, is another refreshing month in Grande-Synthe, France, with an average temperature varying between 9.6°C (49.3°F) and 15.5°C (59.9°F). May's arrival registers an average high-temperature of a still mild 15.5°C (59.9°F), closely aligning with the temperature of the previous month. Weather in May »Weather in June
June, the first month of the summer in Grande-Synthe, is a comfortable month, with an average temperature ranging between min 12.3°C (54.1°F) and max 18.5°C (65.3°F). As Grande-Synthe enters June, the average high-temperature marginally increases from the a moderate 15.5°C (59.9°F) of May to a still refreshing 18.5°C (65.3°F). Weather in June »Weather in July
July in Grande-Synthe, France, is an agreeable summer month, with an average temperature ranging between min 14.7°C (58.5°F) and max 20.8°C (69.4°F). July's average high-temperature stands at a pleasant 20.8°C (69.4°F), showing little deviation from June's 18.5°C (65.3°F). Weather in July »Weather in August
The last month of the summer, August, is also an agreeable month in Grande-Synthe, France, with an average temperature varying between 21°C (69.8°F) and 15.4°C (59.7°F). August brings the highest temperatures, with an average high of 21°C (69.8°F) and an average low of 15.4°C (59.7°F). Weather in August »Weather in September
September, the first month of the autumn in Grande-Synthe, is still a refreshing month, with an average temperature fluctuating between 18.7°C (65.7°F) and 13.6°C (56.5°F). The onset of September brings an average high-temperature of an enjoyable 18.7°C (65.7°F), nearly matching the August temperature. Weather in September »Weather in October
October, the same as September, in Grande-Synthe, France, is another mild autumn month, with an average temperature fluctuating between 15.4°C (59.7°F) and 11.2°C (52.2°F). October heralds a minor drop in average high-temperature, sliding from September's enjoyable 18.7°C (65.7°F) to a mild 15.4°C (59.7°F). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Grande-Synthe, France, with an average temperature ranging between min 7.6°C (45.7°F) and max 10.9°C (51.6°F). The average high-temperature slightly decreases in November, shifting from a moderate 15.4°C (59.7°F) in October to a cool 10.9°C (51.6°F). Weather in November »Weather in December
December, the first month of the winter in Grande-Synthe, is also a frosty month, with an average temperature ranging between min 5.3°C (41.5°F) and max 8.1°C (46.6°F). The weather during December records an average high-temperature of a frosty 8.1°C (46.6°F), closely mirroring the preceding month. Weather in December »Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, having an average high-temperature of 6.8°C (44.2°F) and an average low-temperature of 3.6°C (38.5°F), is the coldest month in Grande-Synthe.
The months with the highest humidity in Grande-Synthe are January and December, with an average relative humidity of 83%.
Throughout the year, in Grande-Synthe, there are 185 rainfall days, and 507mm (19.96") of precipitation is accumulated.
January through March, November and December are months with snowfall.
The month with the most snowfall in Grande-Synthe is January, when snow falls for 2.9 days and typically aggregates up to 28mm (1.1") of snow.
In Grande-Synthe, during the entire year, snow falls for 8.7 days and aggregates up to 63mm (2.48") of snow.
The month with the least sunshine in Grande-Synthe, France, is January, with an average of 4h of sunshine.
The months with the lowest UV index in Grande-Synthe are January, February, November and December, with an average maximum UV index of 2.
April is the month with the least rainfall. Rain falls for 11.6 days and accumulates 22mm (0.87") of precipitation.
In Grande-Synthe, France, snow does not fall in April through October.
June has the longest days of the year, with an average of 16h and 30min of daylight.
June has the most sunshine of the year, with an average of 10.7h of sunshine.
June through August, with an average maximum UV index of 5, are months with the highest UV index in Grande-Synthe.
Grande-Synthe's August weather, marked by an average high temperature of 21°C (69.8°F) and an average low temperature of 15.4°C (59.7°F), is the warmest in the year.
August is the least humid month in Grande-Synthe, with an average relative humidity of 75%.
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Grande-Synthe, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
December is the month with the most rainfall. Rain falls for 17.2 days and accumulates 59mm (2.32") of precipitation.
The month with the shortest days is December, with an average of 8h and 0min of daylight.
Average temperature
Grande-Synthe, France
The warmest month (with the highest average high temperature) is August (21°C).
The month with the lowest average high temperature is January (6.8°C).
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is January (3.6°C).
Average pressure
Grande-Synthe, France
- Average pressure in January:
1015.5mbar - Average pressure in February:
1014.6mbar - Average pressure in March:
1015.8mbar - Average pressure in April:
1015.8mbar - Average pressure in May:
1016.8mbar - Average pressure in June:
1016.5mbar
- Average pressure in July:
1015.8mbar - Average pressure in August:
1015.5mbar - Average pressure in September:
1017.4mbar - Average pressure in October:
1015.9mbar - Average pressure in November:
1011.6mbar - Average pressure in December:
1015.5mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1011.6mbar).
Average wind speed
Grande-Synthe, France
- Average wind speed in January:
22.6km/h - Average wind speed in February:
22.8km/h - Average wind speed in March:
20.2km/h - Average wind speed in April:
16.7km/h - Average wind speed in May:
17.1km/h - Average wind speed in June:
16.9km/h
- Average wind speed in July:
16.6km/h - Average wind speed in August:
16.8km/h - Average wind speed in September:
17.7km/h - Average wind speed in October:
19.8km/h - Average wind speed in November:
22km/h - Average wind speed in December:
24km/h
The windiest month (with the highest average wind speed) is December (24km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity
Grande-Synthe, France
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (75%).
Average rainfall
Grande-Synthe, France
The wettest month (with the highest rainfall) is December (59mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days
Grande-Synthe, France
- Average rainfall days in January:
16.6 days - Average rainfall days in February:
14.4 days - Average rainfall days in March:
13.7 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
17 days - Average rainfall days in September:
14.1 days - Average rainfall days in October:
17.6 days - Average rainfall days in November:
18.3 days - Average rainfall days in December:
17.2 days
The month with the highest number of rainy days is November (18.3 days).
The month with the least rainy days is April (11.6 days).
Average snowfall
Grande-Synthe, France
The month with the highest snowfall is January (28mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Grande-Synthe, France
- Average snowfall days in January:
2.9 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
0.6 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.7 days
The month with the highest number of snowfall days is January (2.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Grande-Synthe, France
- Average daylight in January:
8h and 30min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 54min - Average daylight in May:
15h and 36min - Average daylight in June:
16h and 30min
- Average daylight in July:
16h and 0min - Average daylight in August:
14h and 30min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 42min - Average daylight in November:
8h and 54min - Average daylight in December:
8h and 0min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 48min - Average sunshine in June:
10h and 42min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 12min - Average sunshine in September:
7h and 24min - Average sunshine in October:
5h and 18min - Average sunshine in November:
4h and 6min - Average sunshine in December:
4h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Grande-Synthe, France
- Average sunshine days in January:
10.4 days - Average sunshine days in February:
9.8 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
16.5 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
10.3 days - Average sunshine days in September:
12.5 days - Average sunshine days in October:
9.6 days - Average sunshine days in November:
9.1 days - Average sunshine days in December:
10 days
The month with the most sunshine days is April (16.5 days).
The month with the least sunshine days is November (9.1 days).
Average UV index
Grande-Synthe, France
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Grande-Synthe, France
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is April (Cloud cover 38).
Average visibility
Grande-Synthe, France
The months with the highest visibility are March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, November and December (9km).
