June in Tustin averages a daily high of 26.1°C with nights around 16°C. Rain is rare — about 0.6 wet days and 0.9mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Tustin is April–July.
Based on SANTA ANA FIRE STATION, CA US (3.8km), 1995–2024. 30 years of June data.