Click on a day for an hourly weather forecast
The temperatures in Spokane in September are comfortable with low of 10°C and and high up to 23°C.
The wather in Spokane 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 Spokane in September 2025.
If you’re planning to visit Spokane in the near future, we highly recommend that you review the 14 day weather forecast for Spokane before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -5° | 9 | 7 | 16 | 127 mm | Awful | Spokane in January |
| February | 3° / -4° | 8 | 7 | 15 | 87 mm | Awful | Spokane in February |
| March | 8° / -1° | 10 | 12 | 9 | 124 mm | Awful | Spokane in March |
| April | 12° / 2° | 7 | 19 | 4 | 81 mm | Awful | Spokane in April |
| May | 18° / 5° | 6 | 25 | 1 | 76 mm | Good | Spokane in May |
| June | 22° / 9° | 6 | 24 | 0 | 78 mm | Good | Spokane in June |
| July | 29° / 13° | 2 | 29 | 0 | 23 mm | Good | Spokane in July |
| August | 29° / 14° | 1 | 30 | 0 | 22 mm | Good | Spokane in August |
| September | 23° / 10° | 2 | 27 | 0 | 35 mm | Perfect | Spokane in September |
| October | 14° / 4° | 6 | 23 | 1 | 93 mm | Good | Spokane in October |
| November | 6° / -1° | 8 | 13 | 9 | 105 mm | Awful | Spokane in November |
| December | 0° / -5° | 7 | 7 | 17 | 119 mm | Awful | Spokane in December |