Winters in Rancho Santa Margarita are mild, with temperatures rarely dipping below freezing and averaging around 14°C. The coldest months are January and December, but even then, temperatures can still reach the mid-20s. Springs bring moderate temperatures, warming up to averages of 17°C by April and May. Summers are warm, with July and August being the hottest months, albeit not extremely hot, with highs rarely exceeding 35°C. Falls are mild, with temperatures cooling down to around 18°C by November, but still pleasant overall.