Cardiff Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows both the average monthly rainfall and the number of rainy days in Cardiff, Wales, United Kingdom. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let’s break down all the details for a clearer picture.
Cardiff experiences significant rainfall throughout the year, averaging 1138 mm of precipitation annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
Despite minor fluctuations, Cardiff enjoys fairly consistent precipitation throughout the year. In December, you can expect around 119 mm of precipitation, while in March, Cardiff receives about 76 mm.
December, the wettest month, has a maximum daytime temperature of 10°C. The city receives 49 hours of sunshine in this period. During the driest month March you can expect a temperature of 11°C. For more detailed insights into the city’s temperatures, visit our Cardiff Temperature page.
Annual Precipitation in the United Kingdom
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
Amsterdam Precipitation Compared World Wide
Cardiff’s average annual precipitation is 1138 mm. Let’s compare this to some popular worldwide tourist destinations:
Seville, Spain, experiences 541 mm of rainfall annually, with wet winters and dry summers typical of southern Spain.
In Seoul, South Korea, the average annual precipitation is 1237 mm, with most rain falling during the summer monsoon season.
In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.
Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
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
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Cardiff’s weather, including sunshine hours, humidity levels, and temperature data, visit our Cardiff Climate page.
Current rainfall in Cardiff
