Perris's winters are mild, with temperatures ranging from 2-30°C, averaging around 14°C. Spring brings gradual warming, with April and May temperatures averaging 17°C, while summer is hot, with June, July, and August temperatures peaking at 37°C on average. Autumn is also warm, with September temperatures still averaging 23°C, but cooling down to around 19°C in October. November's temperatures are similar to spring's, averaging 18°C. Winters are the coolest season, with December being particularly chilly, averaging 12°C.