San Juan del Río Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in San Juan del Río, Querétaro, Mexico. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.
Generally, San Juan del Río experiences moderate precipitation patterns, averaging 732 mm (29 in) yearly. However, this average masks significant seasonal variation, including a distinct dry season during certain months that are clearly visible in our monthly breakdown below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
San Juan del Río can be quite wet during September, receiving approximately 136 mm (5.4 in) of precipitation over 8 rainy days.
In contrast December, experiences much drier conditions, with 8.2 mm (0.3 in) of rainfall, spread across a single rainy day.
September, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 209 hours of sunshine in this period. During the driest month December you can expect a temperature of 23°C (73°F). For more detailed insights into the city's temperatures, visit our San Juan del Río Temperature page.
Annual Rainfall in Mexico: City Comparison
The map below shows the annual precipitation across Mexico. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
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San Juan del Río vs World: Rainfall Compared
San Juan del Río's average annual precipitation is 732 mm (29 in). Let's compare this to some popular worldwide tourist destinations:
Boston, USA, experiences 1238 mm (49 in) of annual precipitation, including significant snowfall during the winter.
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.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- 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.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about San Juan del Río's weather, including sunshine hours, humidity levels, and temperature data, visit our San Juan del Río Climate page.
