Grande-Synthe Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Grande-Synthe, Nord-Pas-de-Calais, France. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's explore all the details to give you a full picture.
Generally, Grande-Synthe experiences moderate precipitation patterns, averaging 762 mm (30 in) yearly.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The wettest period in Grande-Synthe occurs in December, which receives around 75 mm (3 in) of precipitation. During the driest month, April, Grande-Synthe experiences moderate rainfall, totaling approximately 52 mm (2 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate.
December, the wettest month, has a maximum daytime temperature of 9°C (48°F). The city receives 48 hours of sunshine in this period. During the driest month April you can expect a temperature of 15°C (59°F). For more detailed insights into the city's temperatures, visit our Grande-Synthe Temperature page.
Annual Rainfall in France: City Comparison
The map below shows the annual precipitation across France. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Grande-Synthe vs World: Rainfall Compared
Grande-Synthe's average annual precipitation is 762 mm (30 in). Let's compare this to some popular worldwide tourist destinations:
The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Precipitation has a very strong role in determining the local climate and ecosystem:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Grande-Synthe's weather, including sunshine hours, humidity levels, and temperature data, visit our Grande-Synthe Climate page.
