Historical weather data, all-time temperature records, and monthly climate averages for San Leandro, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in San Leandro runs mild and mostly dry, with an average high of 63° and low of 49° across 62 years of data. There's a 1-in-4 chance of rain today, though snow is essentially unheard of. The date has seen everything from a 79° scorcher in 1957 to a chilly 37° back in 1955.
San Leandro's weather has real range hiding behind its mild reputation — the mercury has hit 104° (June 1961) and plunged to 25° (January 1949), a 79-degree spread. The wettest single day on record dumped 5.01 inches on New Year's Eve 2022, and the area has even seen an inch of snow, back in February 1976.
San Leandro is warmest in late August through early September, when average highs peak around 74° — not exactly beach weather, but reliably pleasant. Winters are cool and damp, with highs dipping to 55° in early January and the heaviest rainfall clustering around Christmas week. The mild, gradual temperature curve means there's rarely a bad time to visit, just a wetter one.