Historical weather data, all-time temperature records, and monthly climate averages for Pacifica, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Pacifica typically feels like a mild late-winter day, with highs averaging 63° and lows around 48°. There's a one-in-four chance of rain, though snow is essentially unheard of. The date has seen some wild swings over 80 years of records — from a balmy 84° in 1989 to a frigid 39° low back in 1975.
Pacifica's all-time records reveal a town that can occasionally surprise you. It hit a stunning 105° on June 14, 2000 — remarkable for a coastal California city — and dropped to 24° in December 1972. Rain is the more reliable extreme here, with a single January day in 1982 dumping 5.59 inches.
Pacifica runs cool year-round by California standards, with the warmest stretch arriving late summer — average highs peak at 74° the last week of August into early September. Winters are mild but wet, with the final week of December averaging over an inch of rain and highs only dipping to the mid-50s. If you want the best of both worlds, late September and October offer warm, dry conditions before the rains arrive.