Click on a day for an hourly weather forecast
The weather in Killeen in September is hot. The average temperatures are between 22°C and 32°C.
You can expect about 3 to 8 days of rain in Killeen 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 Killeen in September 2025.
If you’re planning to visit Killeen in the near future, we highly recommend that you review the 14 day weather forecast for Killeen before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 6° | 3 | 28 | 0 | 40 mm | Good | Killeen in January |
| February | 16° / 7° | 3 | 24 | 1 | 36 mm | Good | Killeen in February |
| March | 21° / 11° | 4 | 27 | 0 | 55 mm | Good | Killeen in March |
| April | 25° / 14° | 5 | 25 | 0 | 60 mm | Perfect | Killeen in April |
| May | 29° / 18° | 7 | 24 | 0 | 111 mm | Ok | Killeen in May |
| June | 33° / 22° | 5 | 25 | 0 | 86 mm | Good | Killeen in June |
| July | 35° / 24° | 3 | 28 | 0 | 68 mm | Ok | Killeen in July |
| August | 36° / 25° | 3 | 28 | 0 | 75 mm | Ok | Killeen in August |
| September | 32° / 22° | 5 | 25 | 0 | 108 mm | Good | Killeen in September |
| October | 26° / 16° | 4 | 27 | 0 | 96 mm | Perfect | Killeen in October |
| November | 20° / 11° | 3 | 27 | 0 | 44 mm | Good | Killeen in November |
| December | 15° / 7° | 3 | 27 | 0 | 48 mm | Good | Killeen in December |