Historical weather data, all-time temperature records, and monthly climate averages for Carlsbad, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Carlsbad is a mild, mostly dry affair — 93 years of data put the average high at 64° and low at 49°, with only a 14% chance of any rain. The date has swung from a balmy 84° back in 1971 all the way down to a chilly 40° low as recently as 2023.
Carlsbad's all-time records tell the story of a place that rarely gets pushed to extremes — but can be. The thermometer has hit 108° (September 1963) and dropped to 20° (January 1963), and a single March day in 2023 dumped 4.21 inches of rain on the city.
Carlsbad is one of the most temperature-stable places in the country, with monthly average highs ranging only from 62° to 74° across the entire year. Peak warmth arrives in early August, while late February through early March is the coolest stretch. If you're trying to avoid rain, summer is your best bet — the wettest week clusters around late February.