Winters in Yucaipa are mild, with temperatures ranging from freezing to comfortable levels, averaging around 14-18°C. Spring brings increasing warmth, with April and May being the warmest months, often reaching highs of over 30°C. Summer is hot, with July typically being the hottest month, frequently exceeding 40°C, but also experiencing cooler nights. Autumn sees a gradual cooling trend, with temperatures dropping back to around 10-15°C by November. In contrast, winters are quite cool, especially in December, when temperatures can dip below 0°C.