Click on a day for an hourly weather forecast
The temperatures in Yellowknife in August are usually low and can range between 10°C and 18°C.
You can expect about 3 to 8 days of rain in Yellowknife during the month of August. 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 Yellowknife in August 2025.
If you’re planning to visit Yellowknife in the near future, we highly recommend that you review the 14 day weather forecast for Yellowknife before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -20° / -26° | 1 | 9 | 21 | 22 mm | Awful | Yellowknife in January |
| February | -19° / -26° | 1 | 10 | 18 | 14 mm | Awful | Yellowknife in February |
| March | -12° / -19° | 2 | 8 | 21 | 23 mm | Awful | Yellowknife in March |
| April | -3° / -10° | 3 | 10 | 17 | 23 mm | Awful | Yellowknife in April |
| May | 10° / 1° | 3 | 23 | 5 | 32 mm | Bad | Yellowknife in May |
| June | 18° / 9° | 4 | 26 | 0 | 47 mm | Good | Yellowknife in June |
| July | 20° / 12° | 5 | 26 | 0 | 60 mm | Good | Yellowknife in July |
| August | 18° / 10° | 5 | 26 | 0 | 78 mm | Good | Yellowknife in August |
| September | 11° / 5° | 5 | 23 | 2 | 47 mm | Bad | Yellowknife in September |
| October | 1° / -2° | 4 | 11 | 16 | 42 mm | Awful | Yellowknife in October |
| November | -10° / -14° | 2 | 6 | 22 | 33 mm | Awful | Yellowknife in November |
| December | -18° / -23° | 1 | 8 | 22 | 24 mm | Awful | Yellowknife in December |