Rai Valley Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Rai Valley, Marlborough Sounds, New Zealand. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Let's now guide you through the details for a complete overview.
Rai Valley has a notably wet climate with abundant precipitation, recording 1318 mm (52 in) of rainfall per year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The wettest period in Rai Valley occurs in October, which receives around 132 mm (5.2 in) of precipitation. During the driest month, February, Rai Valley experiences moderate rainfall, totaling approximately 84 mm (3.3 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate.
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 February you can expect a temperature of 22°C (72°F). For more detailed insights into the city's temperatures, visit our Rai Valley Temperature page.
Annual Rainfall in New Zealand: City Comparison
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.
heavy rainfall
high
moderate
low
almost none
Rai Valley vs World: Rainfall Compared
Rai Valley's average annual precipitation is 1318 mm (52 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.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
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.
Climate change is affecting precipitation patterns worldwide, including Rai Valley:
- 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.
- 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 Rai Valley's weather, including sunshine hours, humidity levels, and temperature data, visit our Rai Valley Climate page.
