Climate almanac
San Diego de la Unión
Guanajuato, Mexico · 21.47°, -100.87°
What is the climate like in San Diego de la Unión?
The best time to visit San Diego de la Unión is typically October – May, with trip comfort peaking in March (8.9/10). San Diego de la Unión is warmest in May, when daily highs average 86°F (30°C), and coolest in January, when lows fall to about 44°F (6°C). The wettest month is typically June and the driest is January; the year sees roughly 20 in (504 mm) of precipitation.
- Best time to visitOctober – May — comfort peaks in March (8.9/10)
- Warmest monthMay — average high 86°F (30°C)
- Coolest monthJanuary — average low 44°F (6°C)
- Wettest monthJune (3.9 in (100 mm))
- Driest monthJanuary (0.2 in (5 mm))
- Annual precipitation20 in (504 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromSan Diego De La Union, 2 km away (1902-1998)