September · Canada
Best time to visit Yellowknife in September Weather, crowds & prices
Weather in Yellowknife in September
Average temperature 10°C, 26 mm of rain, about 2 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.8/10
Ranked #5 of 12 months
- Avg temp
- 10°C
- Rainfall
- 26 mm
- Humidity
- 78%
- Days with 6h+ sun
- 2
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Yellowknife scores 6.8/10 for nature and wildlife travel - an above-average month (#5 of 12). Expect around 10°C, 26 mm of rain, and roughly 2 days with 6+ hours of sunshine this month.
Yellowknife sits on Great Slave Lake under the aurora oval, with ice roads and wilderness around it.
September in Yellowknife: mixed conditions, plan around the weather
Expect 10°C (49°F) in September. A good month for city streets, viewpoints and long meals; leave swimming for another season.
With around 26 mm of rain, any showers tend to pass through rather than settle in; about 2 days with 6+ hours of sunshine and 12.6 hours of daylight fill the rest.
That is 6.8/10 on the same scale — 5th of 12 months, versus 9.9/10 for the best month here.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, footwear you can get muddy.
Expect mid-season pricing, and crowds are moderate.
If your dates are flexible, July is materially better in Yellowknife — 3.1 points higher on the same scale.
Frequently asked
- What is the weather like in Yellowknife in September?
- In September, Yellowknife averages 10°C, 26 mm of rain, and about 2 days with 6+ hours of sunshine. Its climate-comfort score is 6.8/10.
- Is September a good time to visit Yellowknife?
- September earns a 6.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Yellowknife in September?
- Expect about 26 mm of rain in September. Average humidity is 78% and there are about 2 days with 6+ hours of sunshine.
Curated in Yellowknife
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Yellowknife, Canada. Live activities and tours from GetYourGuide, matched to this destination.