Historical weather data, all-time temperature records, and monthly climate averages for Hollister, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Hollister runs mild, with a historical average high of 67° and low of 43° across 47 years of records. It's a date of surprises though — temps have swung from a scorching 84° in 1989 down to a freezing 31° in 1999. Rain is unlikely, with just an 11% chance of precipitation.
Hollister earns its Central California stripes with a staggering 112° all-time high set in July 2006 and a bone-chilling 14° low in December 1990 — a 98-degree spread that tells you this valley doesn't do halfway. Snow is a genuine rarity here, with Christmas Day 2000 producing the only inch on record.
Hollister peaks in late August through early September, when average highs reach 84° under reliably dry skies — ideal if you want heat without humidity. Winters are mild, with January highs around 59°, though mid-February is when you'll want an umbrella, averaging 0.71 inches of rain in a single week. Spring and fall offer the sweet spot: warm afternoons, cool nights, and little chance of rain.