Click on a day for an hourly weather forecast
The temperatures in Milpitas in September are comfortable with low of 13°C and and high up to 29°C.
There is little to no rain in Milpitas 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 Milpitas in September 2025.
If you’re planning to visit Milpitas in the near future, we highly recommend that you review the 14 day weather forecast for Milpitas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 16° / 5° | 4 | 27 | 0 | 70 mm | Good | Milpitas in January |
| February | 17° / 4° | 4 | 24 | 0 | 61 mm | Good | Milpitas in February |
| March | 18° / 5° | 5 | 26 | 0 | 65 mm | Good | Milpitas in March |
| April | 20° / 6° | 2 | 28 | 0 | 29 mm | Good | Milpitas in April |
| May | 23° / 8° | 1 | 30 | 0 | 15 mm | Perfect | Milpitas in May |
| June | 27° / 11° | 1 | 29 | 0 | 5 mm | Perfect | Milpitas in June |
| July | 30° / 13° | 0 | 31 | 0 | 4 mm | Good | Milpitas in July |
| August | 30° / 13° | 0 | 31 | 0 | 3 mm | Good | Milpitas in August |
| September | 29° / 13° | 0 | 30 | 0 | 7 mm | Good | Milpitas in September |
| October | 25° / 11° | 1 | 30 | 0 | 25 mm | Perfect | Milpitas in October |
| November | 19° / 7° | 3 | 27 | 0 | 39 mm | Good | Milpitas in November |
| December | 15° / 5° | 4 | 27 | 0 | 56 mm | Good | Milpitas in December |