Click on a day for an hourly weather forecast
The weather in Waco in September is hot. The average temperatures are between 21°C and 32°C.
You can expect about 3 to 8 days of rain in Waco 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 Waco in September 2025.
If you’re planning to visit Waco in the near future, we highly recommend that you review the 14 day weather forecast for Waco before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 5° | 4 | 27 | 1 | 86 mm | Good | Waco in January |
| February | 15° / 6° | 4 | 23 | 1 | 79 mm | Good | Waco in February |
| March | 21° / 10° | 5 | 26 | 0 | 99 mm | Good | Waco in March |
| April | 24° / 13° | 6 | 24 | 0 | 97 mm | Perfect | Waco in April |
| May | 28° / 18° | 8 | 23 | 0 | 171 mm | Good | Waco in May |
| June | 33° / 22° | 6 | 24 | 0 | 131 mm | Good | Waco in June |
| July | 35° / 23° | 5 | 26 | 0 | 98 mm | Ok | Waco in July |
| August | 36° / 24° | 4 | 27 | 0 | 108 mm | Ok | Waco in August |
| September | 32° / 21° | 6 | 24 | 0 | 144 mm | Good | Waco in September |
| October | 26° / 15° | 5 | 26 | 0 | 152 mm | Perfect | Waco in October |
| November | 19° / 10° | 4 | 26 | 0 | 82 mm | Good | Waco in November |
| December | 15° / 7° | 4 | 26 | 1 | 87 mm | Good | Waco in December |