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Blenheim Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Blenheim. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Generally, Blenheim receives mid-range precipitation levels, with 932 mm annually.

Monthly Precipitation Levels

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

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

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

Annual Precipitation in New Zealand

The map below shows the annual precipitation across New Zealand. You can also select the different months in case you are interested in a specific month.

Annual
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Annual average
precipitation: 932 mm

More information

Legend heavy rainfall high moderate low almost none
Heavy annual rainfall has been defined as more than 1000 mm precipitation. High: 600 mm to 1000 mm. Moderate: 250 mm to 600 mm. Low: less than 250 mm.

Amsterdam Precipitation Compared World Wide

Blenheim’s average annual precipitation is 932 mm. Let’s compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm, characterized by wet winters and dry summers typical of the Mediterranean climate.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.

In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.

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

How is Precipitation Measured?

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.

Interesting weather facts

  • "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
  • The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm wide and 20 cm thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
  • The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters fell during the winter of 1972.

For more detailed information about Blenheim’s weather, including sunshine hours, humidity levels, and temperature data, visit our Blenheim Climate page.


Current rainfall in Blenheim

Tuesday
18 Feb
Rain showers
Rain showers
21°C
7 mm
Wednesday
19 Feb
Partly cloudy
Partly cloudy
23°C
0.2 mm
Thursday
20 Feb
Clear sky
Clear sky
24°C
0 mm

Interested in more climate information?

This site provides you with all the information you need about the climate in Blenheim.

Our site offers climate and forecast data for every country in the world. Are you going to New Zealand? On this website you can find historical weather averages for many cities in New Zealand. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.