Porto Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Porto, Norte Region, Portugal. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's explore the details to provide you with a complete overview.
Porto has a notably wet climate with abundant precipitation, recording 1213 mm (48 in) of rainfall per year. It does, however, have a distinct dry season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The seasons in Porto, bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 163 mm (6.4 in) of precipitation. This rainfall is distributed across 15 rainy days.
In contrast, the driest month, July, experiences much less rainfall, totaling 22 mm (0.9 in) over 6 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.November, the wettest month, has a maximum daytime temperature of 17°C (63°F). The city receives 138 hours of sunshine in this period. During the driest month July you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our Porto Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Porto's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Porto spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Portugal: City Comparison
The map below shows the annual precipitation across Portugal. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Porto vs World: Rainfall Compared
Porto's average annual precipitation is 1213 mm (48 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.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.
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 Porto's weather, including sunshine hours, humidity levels, and temperature data, visit our Porto Climate page.
