July in Hayward averages a daily high of 23.8°C with nights around 14.3°C. Rain is rare — about 0.1 wet days and 0mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Hayward is May–October.
Based on HAYWARD AIR TERMINAL, CA US (3.7km), 1995–2024. 26 years of July data.