San Diego de la Union is a city of approximately 7,100 people in Guanajuato, Mexico. Located in the Central Time Zone at 21.5°N latitude.
In 2025, San Diego de la Union averaged an annual temperature of 62°F, with hottest temperatures reaching 90°F in May and lowest around 29°F in January. The city received approximately 27 inches of precipitation during the year.
View historical weather for San Diego de la Union · More cities in Guanajuato