July in Mazatlán averages a daily high of 33.5°C with nights around 25.1°C. Expect roughly 9.3 wet days totalling 147.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mazatlán is December–April.
Based on COLONIA JUAN CARRAS, MX (2.4km), 1995–2024. 19 years of July data.