Historical weather data, all-time temperature records, and monthly climate averages for Atascadero, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Atascadero typically feels like a mild spring afternoon, with average highs around 70° and lows dipping to 40° overnight. There's a small but real chance of rain today — historically about 1 in 5 — and believe it or not, the snowiest day in Atascadero's recorded history happened on this exact date in 1929, when 4 inches fell.
Atascadero's climate has serious range — this is a place that has baked at 117° in August 1933 and frozen to 0° in January 1913, a swing of 117 degrees between extremes. A single December day in 1966 dumped 5.25 inches of rain, a reminder that California's Central Coast can turn dramatic fast.
Atascadero runs warm and dry through the summer, peaking in late July and early August with average highs of 94° — but winters are mild, with January highs holding around 60° to 61°. Rain is almost entirely a winter affair, with late January into early February being the wettest stretch of the year. If you're chasing sunshine and warmth, May through October delivers; if you want to avoid heat, stick to winter and early spring.