Historical weather data, all-time temperature records, and monthly climate averages for El Monte, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
El Monte sits in the San Gabriel Valley, where summer heat builds fast and stays late — average highs climb from 86° in June all the way to 95° by August. If you're checking in around late summer, you're in the hottest stretch of the year.
El Monte has seen genuine extremes: a scorching 118° in July 2018 stands as the all-time high, while January 2013 brought a rare dip to 29°. That's an 89-degree spread that tells you this valley can surprise you in either direction.
El Monte is warm year-round, with highs staying in the upper 60s even in late December and peaking near 97° in the final days of August. Winter is the wet season — such as it is — with January seeing the most precipitation, while summer stays almost entirely dry.