Historical weather data, all-time temperature records, and monthly climate averages for Watsonville, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Watsonville typically delivers a mild spring afternoon, with highs averaging 66° and lows around 44°. There's a 1-in-5 chance of rain, though the date's history spans extremes — from a balmy 88° back in 1961 to a near-freezing 33° low in 1912.
Watsonville's all-time records reveal a place that can surprise you. The thermometer once hit 110° on September 3, 2017, and bottomed out at 12° on December 22, 1990 — a 98-degree spread over the station's history. The wettest single day on record dropped nearly 6 inches of rain on Valentine's Day 2000.
Watsonville runs remarkably mild year-round, with monthly highs ranging only from 61° in January to 74° in September — barely 13 degrees of swing. Peak warmth arrives in early September, while late December brings the wettest stretch of the year, averaging nearly 1.4 inches in a single week. If you're chasing sun, summer through fall is your window; if you want to dodge rain, stay away in December and January.