Glendora experiences mild winters, with temperatures rarely dropping below 0°C and often rising above 20°C. Spring arrives in March, bringing warmer temperatures that gradually increase throughout the season, peaking at around 34°C in April. Summer months are warm to hot, with July being the hottest month, while August is almost as warm but slightly cooler. Autumn brings a slight cool-down, with temperatures dropping back down to average highs of around 18°C by October. Winters are mild and relatively cool, especially December which tends to be the coolest month.