Click on a day for an hourly weather forecast
The temperatures in Vacaville in May are comfortable with low of 11°C and and high up to 26°C.
The wather in Vacaville 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 Vacaville in May 2025.
If you’re planning to visit Vacaville in the near future, we highly recommend that you review the 14 day weather forecast for Vacaville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 5° | 6 | 25 | 0 | 106 mm | Good | Vacaville in January |
| February | 16° / 6° | 5 | 23 | 0 | 82 mm | Good | Vacaville in February |
| March | 18° / 7° | 6 | 25 | 0 | 95 mm | Good | Vacaville in March |
| April | 22° / 9° | 3 | 27 | 0 | 28 mm | Good | Vacaville in April |
| May | 26° / 11° | 2 | 29 | 0 | 16 mm | Perfect | Vacaville in May |
| June | 31° / 14° | 1 | 29 | 0 | 5 mm | Good | Vacaville in June |
| July | 33° / 15° | 0 | 31 | 0 | 1 mm | Good | Vacaville in July |
| August | 33° / 15° | 0 | 31 | 0 | 0 mm | Good | Vacaville in August |
| September | 32° / 16° | 1 | 30 | 0 | 4 mm | Good | Vacaville in September |
| October | 26° / 13° | 2 | 29 | 0 | 35 mm | Perfect | Vacaville in October |
| November | 18° / 8° | 4 | 26 | 0 | 46 mm | Good | Vacaville in November |
| December | 13° / 5° | 6 | 25 | 0 | 98 mm | Ok | Vacaville in December |