Historical weather data, all-time temperature records, and monthly climate averages for Milpitas, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Milpitas sits squarely in mild spring territory, with 116 years of data pointing to an average high of 68° and a low of 46°. The date has seen some wild swings though — from a scorching 88° in 2000 down to a near-freezing 33° back in 1918. There's about a 1-in-4 chance of rain today, but you can safely leave the snow shovel in storage.
Milpitas has a classic Bay Area personality — mostly mild, occasionally surprising. The mercury has touched 109° (June 2000) and plunged to 18° (January 1894), a 91-degree spread that hints at the extremes lurking beneath the generally temperate reputation. Snow is essentially a myth here, with the all-time record standing at a modest 1 inch back in December 1932.
Milpitas runs warmest from mid-July through September, with average highs in the low-to-mid 80s — comfortable without the brutal heat of California's interior valleys. Winters are cool but rarely cold, with January and December averaging around 58°. If you're dodging rain, avoid late January through early February, the wettest stretch of the year at nearly 0.8 inches per week on average.