Yellowknife weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Fair
Best time to visit: June – August
What is the weather like in Yellowknife in September?
In September, Yellowknife is cool: daytime highs average 11 °C, and nights cool down to about 6 °C. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 38 mm. All in all, September is a so-so month for a holiday in Yellowknife.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 85 | 44 | 24 |
| Day | 18° | 11° | 2° |
| Night | 11° | 6° | −2° |
| Sun | 8 h | 5 h | 2 h |
| Rain days | 9 | 8 | 7 |
More details for September
- Daylight
- 13 h 6 min07:00 – 20:06
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 69 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−6America/Edmonton
How the score comes together
- Temperatureweight 50 %30 %
- Sunshineweight 20 %35 %
- Few rainy daysweight 30 %74 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- A jumper for the evenings
Yellowknife in September: quick answers
Is Yellowknife hot in September?
No. In September, Yellowknife is cool: daytime highs average 11 °C and nights drop to about 6 °C.
Does it rain much in Yellowknife in September?
Rain falls on about 8 days, adding up to 38 mm.
Yellowknife month by month
The whole year in YellowknifeAll destinations: CanadaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences