Montclair's winters are mild, with temperatures ranging from just above freezing to the mid-teens Celsius, while springs see a steady rise in temperatures, reaching up to 34 degrees by April. Summers are warm to hot, with July being the hottest month, but temperatures rarely drop below 16 degrees. Autumn brings another decline in temperature, with October and November averaging around 18 and 16 degrees respectively. Winters can be chilly, especially December, which sees temperatures as low as -6 degrees on average.