Winters in Hamilton are cold and variable, with temperatures often dropping below freezing and averaging around 0°C in January. Spring brings mild temperatures, gradually warming up to averages of 11°C by April, with occasional warm days reaching as high as 28°C. Summer is relatively cool compared to other parts of the world, with average highs around 24-25°C from June to August, but can experience short periods of warmth above 35°C. Autumn sees a return to cooler temperatures, averaging around 16°C in May and October, with occasional warmer days reaching up to 28°C. By winter, temperatures drop again, averaging around 6°C by December, but still experiencing some milder days with highs up to 21°C.