Click on a day for an hourly weather forecast
The temperatures in San Jose in May are quite cold with temperatures between 8°C and 23°C, warm clothes are a must.
The wather in San Jose 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 San Jose in May 2025.
If you’re planning to visit San Jose in the near future, we highly recommend that you review the 14 day weather forecast for San Jose before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 16° / 5° | 4 | 27 | 0 | 70 mm | Good | San Jose in January |
| February | 17° / 4° | 4 | 24 | 0 | 61 mm | Good | San Jose in February |
| March | 18° / 5° | 5 | 26 | 0 | 65 mm | Good | San Jose in March |
| April | 20° / 6° | 2 | 28 | 0 | 29 mm | Good | San Jose in April |
| May | 23° / 8° | 1 | 30 | 0 | 15 mm | Perfect | San Jose in May |
| June | 27° / 11° | 1 | 29 | 0 | 5 mm | Perfect | San Jose in June |
| July | 30° / 13° | 0 | 31 | 0 | 4 mm | Good | San Jose in July |
| August | 30° / 13° | 0 | 31 | 0 | 3 mm | Good | San Jose in August |
| September | 29° / 13° | 0 | 30 | 0 | 7 mm | Good | San Jose in September |
| October | 25° / 11° | 1 | 30 | 0 | 25 mm | Perfect | San Jose in October |
| November | 19° / 7° | 3 | 27 | 0 | 39 mm | Good | San Jose in November |
| December | 15° / 5° | 4 | 27 | 0 | 56 mm | Good | San Jose in December |