Click on a day for an hourly weather forecast
The temperatures in Gallup in September are comfortable with low of 12°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Gallup 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 Gallup in September 2025.
If you’re planning to visit Gallup in the near future, we highly recommend that you review the 14 day weather forecast for Gallup before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / -5° | 3 | 20 | 8 | 32 mm | Awful | Gallup in January |
| February | 7° / -3° | 2 | 19 | 7 | 29 mm | Bad | Gallup in February |
| March | 12° / 0° | 2 | 25 | 4 | 25 mm | Bad | Gallup in March |
| April | 17° / 3° | 1 | 26 | 3 | 17 mm | Ok | Gallup in April |
| May | 22° / 7° | 2 | 29 | 1 | 18 mm | Good | Gallup in May |
| June | 28° / 13° | 1 | 29 | 0 | 20 mm | Perfect | Gallup in June |
| July | 29° / 16° | 4 | 28 | 0 | 83 mm | Good | Gallup in July |
| August | 28° / 16° | 3 | 28 | 0 | 61 mm | Perfect | Gallup in August |
| September | 25° / 12° | 3 | 27 | 0 | 51 mm | Perfect | Gallup in September |
| October | 18° / 5° | 2 | 28 | 1 | 22 mm | Good | Gallup in October |
| November | 12° / -1° | 3 | 25 | 2 | 21 mm | Bad | Gallup in November |
| December | 5° / -5° | 3 | 20 | 8 | 32 mm | Awful | Gallup in December |