Rialto's winters are mild, with temperatures ranging from near-freezing to mild highs in the mid-20s Celsius. Spring brings gradual warming, with temperatures steadily increasing throughout March and April. Summer months are hot, with July often seeing scorching highs above 40 degrees Celsius, while August is similarly sweltering but slightly cooler. Autumn is generally pleasant, with temperatures cooling down after a warm September, returning to more moderate levels by October and November. Winters bring the coolest temperatures, with December being particularly chilly, averaging just 8 degrees Celsius overall.