Historical weather data, all-time temperature records, and monthly climate averages for Larkspur, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Larkspur typically lands in the sweet spot of spring, with average highs of 67° and lows of 44°. There's about a 1-in-3 chance of rain today, though the range of what's possible is striking — this date has seen everything from a balmy 88° back in 1924 to a hard freeze at 31° in 1918.
Larkspur's weather has real teeth at the extremes: the thermometer has hit 112° in July and plunged to 17° on New Year's Eve 1915. The wettest single day on record dumped 11.56 inches of rain on January 21, 1967 — and the snowiest day ever managed just one inch, on Christmas 1948.
Larkspur runs warm from June through October, peaking in mid-July with average highs around 83–84°. Winters are mild but wet, with the rainiest stretch hitting in late December at over 2.5 inches per week and highs cooling to the mid-50s. If you're chasing dry and warm, late spring through early fall is your window.