Portishead Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Portishead, Somerset, United Kingdom. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.
Generally, Portishead has a moderate amount of precipitation, averaging 890 mm (35 in) of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Year-round, Portishead has a balanced climate with minimal variation in precipitation. The difference between the wettest month, October, with 86 mm (3.4 in), and the driest month, March, with 63 mm (2.5 in), is minimal.
October, the wettest month, has a maximum daytime temperature of 15°C (59°F). The city receives 102 hours of sunshine in this period. During the driest month March you can expect a temperature of 12°C (54°F). For more detailed insights into the city's temperatures, visit our Portishead Temperature page.
Annual Rainfall in the United Kingdom: City Comparison
The map below shows the annual precipitation across the United Kingdom. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Portishead vs World: Rainfall Compared
Portishead's average annual precipitation is 890 mm (35 in). Let's compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
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.
Climate change is affecting precipitation patterns worldwide, including Portishead:
- 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 Portishead's weather, including sunshine hours, humidity levels, and temperature data, visit our Portishead Climate page.
