Potrero Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Potrero, Guanacaste, Costa Rica. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.
Potrero has a notably wet climate with abundant precipitation, recording 1545 mm (61 in) of rainfall per year. It does, however, have a distinct dry and rainy 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 climate in Potrero shows significant variation throughout the year. Expect 329 mm (13 in) of precipitation during the wettest month October, distributed over 21 rainy days.
In contrast, February offers drier and sunnier days, with around 3 mm (0.1 in) of rainfall over 5 rainy days.
October, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 171 hours of sunshine in this period. During the driest month February you can expect a temperature of 32°C (90°F). For more detailed insights into the city's temperatures, visit our Potrero Temperature page.
Daily Historical Precipitation
32-year average (1987-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Potrero's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Potrero spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Costa Rica: City Comparison
The map below shows the annual precipitation across Costa Rica. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Potrero vs World: Rainfall Compared
Potrero's average annual precipitation is 1545 mm (61 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.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
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.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
- Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
- Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.
- 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 Potrero's weather, including sunshine hours, humidity levels, and temperature data, visit our Potrero Climate page.
