Click on a day for an hourly weather forecast
The temperatures in Yakima in September are comfortable with low of 12°C and and high up to 25°C.
The wather in Yakima in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Yakima in September 2025.
If you’re planning to visit Yakima in the near future, we highly recommend that you review the 14 day weather forecast for Yakima before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -3° | 6 | 20 | 5 | 51 mm | Awful | Yakima in January |
| February | 6° / -2° | 4 | 20 | 5 | 28 mm | Awful | Yakima in February |
| March | 11° / 1° | 3 | 26 | 2 | 36 mm | Bad | Yakima in March |
| April | 15° / 4° | 1 | 29 | 0 | 18 mm | Good | Yakima in April |
| May | 21° / 8° | 3 | 29 | 0 | 26 mm | Good | Yakima in May |
| June | 26° / 11° | 2 | 29 | 0 | 13 mm | Perfect | Yakima in June |
| July | 32° / 15° | 0 | 31 | 0 | 4 mm | Good | Yakima in July |
| August | 32° / 16° | 0 | 31 | 0 | 6 mm | Good | Yakima in August |
| September | 25° / 12° | 1 | 29 | 0 | 10 mm | Perfect | Yakima in September |
| October | 17° / 6° | 2 | 29 | 0 | 25 mm | Good | Yakima in October |
| November | 9° / 1° | 3 | 25 | 2 | 29 mm | Bad | Yakima in November |
| December | 4° / -4° | 5 | 19 | 7 | 40 mm | Awful | Yakima in December |