Herriman's winters are cold, with temperatures frequently dropping below freezing and averaging around 0°C. Spring brings a gradual warming trend, with temperatures rising steadily through March and April, reaching averages of 5-8°C by May. Summer is warm to hot, with July and August being the warmest months, averaging highs around 26-27°C. Autumn is mild, with temperatures cooling gradually from September to November, before dropping again in December. The temperature fluctuations are relatively consistent throughout the year, with minimal extremes beyond a few degrees above or below freezing.