Click on a day for an hourly weather forecast
The temperatures in Fontana in September are comfortable with low of 14°C and and high up to 32°C.
There is little to no rain in Fontana 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 Fontana in September 2025.
If you’re planning to visit Fontana in the near future, we highly recommend that you review the 14 day weather forecast for Fontana before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 5° | 2 | 29 | 0 | 50 mm | Good | Fontana in January |
| February | 18° / 5° | 2 | 26 | 0 | 55 mm | Good | Fontana in February |
| March | 20° / 5° | 2 | 29 | 0 | 31 mm | Good | Fontana in March |
| April | 23° / 7° | 1 | 29 | 0 | 23 mm | Perfect | Fontana in April |
| May | 26° / 9° | 0 | 31 | 0 | 7 mm | Perfect | Fontana in May |
| June | 31° / 12° | 0 | 30 | 0 | 2 mm | Good | Fontana in June |
| July | 34° / 15° | 1 | 30 | 0 | 18 mm | Ok | Fontana in July |
| August | 34° / 16° | 0 | 31 | 0 | 10 mm | Ok | Fontana in August |
| September | 32° / 14° | 0 | 30 | 0 | 7 mm | Good | Fontana in September |
| October | 27° / 10° | 0 | 31 | 0 | 8 mm | Perfect | Fontana in October |
| November | 22° / 7° | 1 | 29 | 0 | 18 mm | Good | Fontana in November |
| December | 17° / 4° | 3 | 28 | 0 | 63 mm | Good | Fontana in December |