San Diego County Fair 2024 Dates. The official first day of summer this year is june 20, but for many san diegans, the real summer kickoff will be june 12, when the 2024 san diego county fair. Dates & times the 2024 san diego county fair is open june 12 through july 7.
What are the dates and times of the san diego county fair? The fair will be closed mondays and tuesdays.