Click on a day for an hourly weather forecast
The temperatures in Beaverton 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 Beaverton 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 Beaverton in September 2025.
If you’re planning to visit Beaverton in the near future, we highly recommend that you review the 14 day weather forecast for Beaverton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 2° | 13 | 17 | 2 | 240 mm | Awful | Beaverton in January |
| February | 9° / 2° | 11 | 15 | 3 | 171 mm | Awful | Beaverton in February |
| March | 12° / 4° | 13 | 17 | 2 | 192 mm | Awful | Beaverton in March |
| April | 15° / 5° | 8 | 21 | 1 | 136 mm | Ok | Beaverton in April |
| May | 20° / 7° | 6 | 25 | 0 | 93 mm | Good | Beaverton in May |
| June | 23° / 10° | 4 | 26 | 0 | 66 mm | Perfect | Beaverton in June |
| July | 28° / 13° | 1 | 30 | 0 | 15 mm | Perfect | Beaverton in July |
| August | 29° / 14° | 1 | 30 | 0 | 16 mm | Good | Beaverton in August |
| September | 25° / 12° | 4 | 26 | 0 | 78 mm | Perfect | Beaverton in September |
| October | 18° / 9° | 8 | 24 | 0 | 162 mm | Ok | Beaverton in October |
| November | 11° / 5° | 12 | 18 | 0 | 201 mm | Bad | Beaverton in November |
| December | 7° / 2° | 12 | 18 | 1 | 220 mm | Bad | Beaverton in December |