Wheaton experiences a moderate climate with distinct seasonal changes. Winters are chilly, with temperatures often below freezing, but can occasionally rise into double digits, averaging around 3-8°C. Spring brings gradual warming, with March marking the beginning of a significant temperature increase, eventually reaching averages of 18-24°C by June and July. Summer is warm to hot, with highs in the mid-to-high 30s, although nighttime temperatures can still be cool. Autumn sees a return to more moderate temperatures, with September's averages dropping back down into the teens before cooling further by November.