Canada
Yellowknife in September: weather & travel advice
This month's data profile
Clear transition month
Yellowknife in September is climatically mixed. The average daily high is around 11 °C. With about 9 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
49/100 · #5
Warmth
#4
Dryness
#9
Sun
#7
Published best categories: none
Yellowknife · SeptemberPhoto: Sebastian Schlaeger · CC BY-SA 2.0Climate facts
- Average high
- 11 °C
- Average low
- 4 °C
- Rainy days (est.)
- 9 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 78 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 18 | 11 | 9 | 53 | 5.1 | 69 | 3.9 | 74 |
| September (selected) | 11 | 4 | 9 | 45 | 3.1 | 78 | 4.1 | 49 |
| October | -2 | -7 | 8 | 33 | 1.3 | 89 | 3.5 | 37 |
How do the previous and next months compare?
Baseline: September (49/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | +25 | +7.7 °C | +6.7 °C | +0.8 | +8.5 mm | +2 h | -9.3 % | -0.2 m/s |
| October | -12 | -12.2 °C | -11.3 °C | -0.4 | -11.6 mm | -1.8 h | +11.2 % | -0.5 m/s |
All twelve months in context
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Frequently asked questions
How warm is Yellowknife in September?
The average daily high is around 11 °C, with an average daily low of about 4 °C.
Does it rain a lot in Yellowknife in September?
The curated estimate is about 9 rainy days per month, not a directly measured long-term average. Total precipitation averages around 45 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Yellowknife?
By the climate score, June, July and August are the strongest months for Yellowknife. September is not among them.