Historical weather data, all-time temperature records, and monthly climate averages for Mendota, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
Mendota sits in California's San Joaquin Valley, where summer heat is no joke — the all-time record hit 110° in July 2021. Historically, today's date falls within a pattern shaped by that relentless valley sun and the seasonal rhythms of Central California agriculture.
Mendota's weather runs to extremes: a scorching 110° in July 2021 marks the hottest day on record, while December 23, 1990 bottomed out at a frigid 14°. That's a 96-degree swing that captures just how dramatically this inland valley can behave across the seasons.
Mendota is quintessential San Joaquin Valley — blazing summers with highs peaking around 91-92° in late July, and mild but chilly winters hovering in the mid-50s through December and January. The wettest stretch falls in early January, though precipitation totals remain very low year-round. If you're visiting for comfort, aim for April through May, when highs are a pleasant 69-77° before the heat takes over.