Click on a day for an hourly weather forecast
The temperatures in San Jose in September are comfortable with low of 13°C and and high up to 29°C.
There is little to no rain in San Jose during September, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.
Our weather forecast can give you a great sense of what weather to expect in San Jose in September 2024.
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 |