Gilroy's winters are mild, with temperatures rarely dropping below freezing and averaging around 10-11°C. Spring brings gradual warming, reaching average highs of 12-15°C by May-June. Summers are warm, but not hot, with temperatures peaking in the mid-20s Celsius, while autumns see a slight cooling trend, returning to winter-like conditions by December. The temperature range is relatively consistent throughout the year, with some variation in extremes, and average highs typically ranging from 11°C in January to 15°C in July-August.