Historical weather data, all-time temperature records, and monthly climate averages for Tamalpais-Homestead Valley, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Tamalpais-Homestead Valley typically lands right in the heart of spring, with average highs of 67° and lows of 43°. Historically, the date swings wide — a scorching 85° in 1957 and a freezing 32° back in 1918. There's roughly a 1-in-4 chance of rain today, so keep a layer handy.
Tamalpais-Homestead Valley has seen some genuine extremes over its 124 years of records — from a blistering 112° in July 1913 to a bone-chilling 17° on New Year's Eve 1915. The wettest single day on record dumped 11.56 inches of rain on January 21, 1967, and snow, while rare, did make a Christmas Day appearance in 1948.
Summer is the sweet spot here, with highs peaking around 83-84° in mid-July and staying warm through September. If you're cold-sensitive, avoid early January when average highs dip to just 54°. Rain is largely a winter affair — the last week of December is the wettest of the year, averaging over 2.5 inches — so late spring through fall is reliably dry.