St Helena Bay Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in St Helena Bay, Western Cape, South Africa. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.

St Helena Bay's climate is marked by below-average rainfall, accumulating 288 mm (11 in) of precipitation yearly. The distribution includes a distinct dry season during certain months as shown in the precipitation charts below.

Monthly Precipitation Levels

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

St Helena Bay can be quite wet during June, receiving approximately 53 mm (2.1 in) of precipitation over 9 rainy days.

In contrast February, experiences much drier conditions, with 8.4 mm (0.3 in) of rainfall, spread across 2 rainy days.

June, the wettest month, has a maximum daytime temperature of 17°C (63°F). During the driest month February you can expect a temperature of 23°C (73°F). For more detailed insights into the city's temperatures, visit our St Helena Bay Temperature page.

St Helena Bay's average annual precipitation is 288 mm (11 in). Let's compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

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 St Helena Bay's weather, including sunshine hours, humidity levels, and temperature data, visit our St Helena Bay Climate page.