San Miguel de Allende Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in San Miguel de Allende, Guanajuato, Mexico. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's explore all the details to give you a full picture.
On average, San Miguel de Allende receives a reasonable amount of rainfall, with an annual precipitation of 628 mm (25 in). Despite this overall moderate level, the city experiences distinct dry season during certain months throughout the year, as illustrated in the precipitation charts below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in San Miguel de Allende shows significant variation throughout the year. Expect 124 mm (4.9 in) of precipitation during the wettest month July, distributed over 11 rainy days.
In contrast, December offers drier and sunnier days, with around 5.3 mm (0.2 in) of rainfall over 2 rainy days.
July, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 202 hours of sunshine in this period. During the driest month December you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our San Miguel de Allende Temperature page.
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore San Miguel de Allende's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for San Miguel de Allende spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
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
almost none
San Miguel de Allende vs World: Rainfall Compared
San Miguel de Allende's average annual precipitation is 628 mm (25 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.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
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.
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.
- "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 Miguel de Allende's weather, including sunshine hours, humidity levels, and temperature data, visit our San Miguel de Allende Climate page.
