Click on a day for an hourly weather forecast
The temperatures in Osoyoos in September are quite cold with temperatures between 6°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Osoyoos 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 Osoyoos in September 2025.
If you’re planning to visit Osoyoos in the near future, we highly recommend that you review the 14 day weather forecast for Osoyoos before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -10° | 6 | 7 | 20 | 68 mm | Awful | Osoyoos in January |
| February | -1° / -10° | 6 | 5 | 17 | 50 mm | Awful | Osoyoos in February |
| March | 4° / -5° | 8 | 7 | 17 | 89 mm | Awful | Osoyoos in March |
| April | 10° / -1° | 6 | 16 | 8 | 70 mm | Bad | Osoyoos in April |
| May | 17° / 3° | 8 | 21 | 2 | 89 mm | Bad | Osoyoos in May |
| June | 21° / 6° | 7 | 23 | 0 | 79 mm | Ok | Osoyoos in June |
| July | 27° / 10° | 3 | 28 | 0 | 38 mm | Perfect | Osoyoos in July |
| August | 27° / 10° | 2 | 29 | 0 | 23 mm | Perfect | Osoyoos in August |
| September | 21° / 6° | 3 | 27 | 0 | 43 mm | Good | Osoyoos in September |
| October | 11° / 1° | 5 | 23 | 3 | 60 mm | Bad | Osoyoos in October |
| November | 3° / -5° | 6 | 9 | 15 | 72 mm | Awful | Osoyoos in November |
| December | -3° / -11° | 6 | 7 | 19 | 61 mm | Awful | Osoyoos in December |