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This page shows both the average monthly rainfall and the number of rainy days in Santa Rosalía, Aguascalientes, Mexico. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.
Santa Rosalía has a dry climate with very low precipitation, averaging 143 mm (5.6 in) of rainfall annually.
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, September receives substantial rainfall, averaging 58 mm (2.3 in) of precipitation, recorded across 2 rainy days.
In contrast, the driest month, May brings less rainfall, with 0.2 mm (0.01 in) over 0 rainy days.
September, the wettest month, has a maximum daytime temperature of 33°C (91°F). During the driest month May you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our Santa Rosalía Temperature page.
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.
Santa Rosalía's average annual precipitation is 143 mm (5.6 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
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.
Climate change is affecting precipitation patterns worldwide, including Santa Rosalía:
For more detailed information about Santa Rosalía's weather, including sunshine hours, humidity levels, and temperature data, visit our Santa Rosalía Climate page.
Pick a month to see the average temperature, rainfall and sunshine in Santa Rosalía - and find the best time to visit.
Temperature Rainfall Humidity
See the full Santa Rosalía climate overview or explore weather in Mexico.
Where to go in September - average daytime high across popular destinations.
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