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The weather in Frisco in September is hot. The average temperatures are between 22°C and 31°C.
You can expect about 3 to 8 days of rain in Frisco during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Frisco in September 2025.
If you’re planning to visit Frisco in the near future, we highly recommend that you review the 14 day weather forecast for Frisco before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 4° | 4 | 27 | 1 | 82 mm | Ok | Frisco in January |
| February | 13° / 5° | 5 | 21 | 2 | 101 mm | Bad | Frisco in February |
| March | 19° / 10° | 7 | 24 | 0 | 134 mm | Ok | Frisco in March |
| April | 23° / 13° | 6 | 24 | 0 | 120 mm | Perfect | Frisco in April |
| May | 27° / 18° | 8 | 23 | 0 | 208 mm | Good | Frisco in May |
| June | 32° / 23° | 8 | 22 | 0 | 153 mm | Ok | Frisco in June |
| July | 34° / 24° | 7 | 24 | 0 | 119 mm | Bad | Frisco in July |
| August | 35° / 25° | 5 | 26 | 0 | 126 mm | Ok | Frisco in August |
| September | 31° / 22° | 6 | 24 | 0 | 173 mm | Good | Frisco in September |
| October | 25° / 16° | 6 | 25 | 0 | 187 mm | Perfect | Frisco in October |
| November | 18° / 10° | 4 | 25 | 0 | 115 mm | Good | Frisco in November |
| December | 13° / 6° | 5 | 26 | 0 | 122 mm | Ok | Frisco in December |