Lannion Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Lannion, Brittany, France. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's break down all the details for a clearer picture.

Generally, Lannion receives mid-range precipitation levels, with 993 mm (39 in) annually.

Monthly Precipitation Levels

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

Lannion can be quite wet during December, receiving approximately 128 mm (5 in) of precipitation over 20 rainy days.

In contrast July, experiences much drier conditions, with 49 mm (1.9 in) of rainfall, spread across 11 rainy days.

December, the wettest month, has a maximum daytime temperature of 12°C (54°F). During the driest month July you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our Lannion Temperature page.

Lannion's average annual precipitation is 993 mm (39 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.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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.

• 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 Lannion's weather, including sunshine hours, humidity levels, and temperature data, visit our Lannion Climate page.