Blenheim Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Blenheim, Marlborough Sounds, New Zealand. 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.

On average, Blenheim receives a reasonable amount of rainfall, with an annual precipitation of 932 mm (37 in).

Monthly Precipitation Levels

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

Despite minor fluctuations, Blenheim enjoys fairly consistent precipitation throughout the year. In October, you can expect around 93 mm (3.7 in) of precipitation, while in March, Blenheim receives about 60 mm (2.4 in).

October, the wettest month, has a maximum daytime temperature of 17°C (63°F). The city receives 240 hours of sunshine in this period. During the driest month March you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our Blenheim Temperature page.

Blenheim's average annual precipitation is 932 mm (37 in). Let's compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

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.

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