Historical weather data, all-time temperature records, and monthly climate averages for Ramona, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Ramona runs mild, with highs averaging 74° and lows around 50° across 43 years of records. The date has some wild swings in its history though — temps have reached as high as 99° (1989) and dropped to 38° overnight (1999). Rain is unlikely, with only a 12% chance of any precipitation.
Ramona earns its reputation as an inland heat pocket with an all-time high of 115° recorded on September 6, 2020 — one of the most extreme readings in Southern California that year. On the other end, a single January night in 2007 bottomed out at 25°, and the wettest single day on record delivered 3.24 inches back in January 1980.
Ramona stays mild year-round, with average highs never dipping below 68° even in the heart of winter — making it a comfortable destination in any season. Peak heat arrives late summer, with the warmest week averaging 91° highs around the end of August. If you're rain-averse, avoid late February through early March, which is the wettest stretch of the year.