Historical weather data, all-time temperature records, and monthly climate averages for Alpine, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Alpine runs mild, with highs averaging 73° and lows around 46° across 69 years of records. There's only a 16% chance of rain today, though the date has seen its share of extremes — from a scorching 99° back in 1989 to a freezing 32° low in 1955.
Alpine plays it warm by San Diego backcountry standards, but it's no stranger to extremes — the all-time high hit a brutal 113° on September 5, 2020, while the coldest night on record bottomed out at 19° in January 1963. The wettest single day ever was March 1, 1991, when 4.8 inches fell — a reminder that winter storms can still punch hard at this elevation.
Summer is the clear headliner here, with late July through early August averaging highs of 91° — peak heat country. The coolest stretch runs through late December, where highs settle into the mid-60s, and if you're hoping to dodge rain, avoid late February through early March, which is historically the wettest window of the year.