Historical weather data, all-time temperature records, and monthly climate averages for Santa Ana, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Santa Ana runs mild, with an average high of 72° and a low of 49° across 108 years of records. The date has seen some wild swings though — from a scorching 98° in 1989 to a near-freezing 33° in 1945. Rain is unlikely but not impossible, showing up about 16% of the time.
Santa Ana is no stranger to extremes — the all-time high of 114° in July 2018 is a reminder of just how intense the inland heat can get, while a 16° reading in January 1989 shows winter can occasionally bite. For a Southern California city, that's a 98-degree spread between the all-time records.
Santa Ana is warm year-round, with highs staying in the upper 60s even in the dead of winter and peaking around 85-86° in late August and early September. If you're avoiding heat, January through March keeps things comfortably mild in the upper 60s to low 70s. Wet weather is rare but concentrated in winter, with early February being the soggiest stretch of the year.