Click on a day for an hourly weather forecast
The temperatures in Gilroy in May are quite cold with temperatures between 9°C and 23°C, warm clothes are a must.
The wather in Gilroy in May can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Gilroy in May 2025.
If you’re planning to visit Gilroy in the near future, we highly recommend that you review the 14 day weather forecast for Gilroy before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 16° / 5° | 5 | 26 | 0 | 95 mm | Good | Gilroy in January |
| February | 17° / 5° | 5 | 24 | 0 | 72 mm | Good | Gilroy in February |
| March | 18° / 6° | 6 | 25 | 0 | 89 mm | Good | Gilroy in March |
| April | 20° / 7° | 3 | 27 | 0 | 30 mm | Good | Gilroy in April |
| May | 23° / 9° | 1 | 30 | 0 | 11 mm | Perfect | Gilroy in May |
| June | 26° / 11° | 0 | 30 | 0 | 3 mm | Perfect | Gilroy in June |
| July | 28° / 13° | 0 | 31 | 0 | 2 mm | Perfect | Gilroy in July |
| August | 28° / 13° | 0 | 31 | 0 | 0 mm | Perfect | Gilroy in August |
| September | 28° / 14° | 0 | 30 | 0 | 4 mm | Perfect | Gilroy in September |
| October | 25° / 11° | 1 | 30 | 0 | 24 mm | Perfect | Gilroy in October |
| November | 19° / 7° | 4 | 27 | 0 | 43 mm | Good | Gilroy in November |
| December | 15° / 5° | 6 | 25 | 0 | 94 mm | Good | Gilroy in December |