Moreno Valley's winters are mild, with temperatures rarely dropping below 3°C or rising above 29°C, averaging around 13-14°C. Spring brings gradually warmer days, with April and May seeing averages of 17°C, while summer is hot, especially in June and July, when highs reach up to 37°C and averages hover around 22-25°C. Autumn cools down significantly, with September being the warmest month, averaging 23°C, before temperatures drop again in November and December, which are cooler, averaging around 12-18°C. The temperature fluctuations throughout the year are moderate, but overall Moreno Valley's climate is mild to hot.