July in Manteca averages a daily high of 35°C with nights around 15.9°C. Rain is rare — about 0.1 wet days and 0mm across the month. Generally workable, with some weather to plan around.
Across the year, the best time to visit Manteca is April–May.
Based on STOCKTON AIRPORT, CA US (10.3km), 1995–2024. 30 years of July data.