Winters in Upland are mild, with temperatures ranging from near-freezing to mid-twenties Celsius, averaging around 14°C. As the seasons transition into spring, temperatures gradually warm up, reaching averages of 17°C by April and May. Summers are hot, with July and August seeing high temperatures often reaching above 40°C, while still managing an average temperature. Autumn brings a slight cooling trend, with temperatures dipping back down to around 18°C in October before slowly decreasing into winter again.