Boulogne-Billancourt Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Boulogne-Billancourt, Ile de France, France. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.

On average, Boulogne-Billancourt receives a reasonable amount of rain/snowfall, with an annual precipitation of 744 mm (29 in).

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Despite minor fluctuations, Boulogne-Billancourt enjoys fairly consistent precipitation throughout the year. In December, you can expect around 75 mm (3 in) of precipitation, while in September, Boulogne-Billancourt receives about 53 mm (2.1 in).

December, the wettest month, has a maximum daytime temperature of 9°C (48°F). The city receives 58 hours of sunshine in this period. During the driest month September you can expect a temperature of 22°C (72°F). For more detailed insights into the city's temperatures, visit our Boulogne-Billancourt Temperature page.

Boulogne-Billancourt's average annual precipitation is 744 mm (29 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

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.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

For more detailed information about Boulogne-Billancourt's weather, including sunshine hours, humidity levels, and temperature data, visit our Boulogne-Billancourt Climate page.