Yellowknife
September
Weather in Yellowknife for September 2026
Your guide to Yellowknife weather in September - trends and predictions
In general, the average temperature in Yellowknife at the beginning of September is 15.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 9.7 °C by the end of September.
With an average of 2 rainy days, Yellowknife experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
28
Dry days
2
Rainy days
0
Snow days
16°/5°
Temperatures
23 km/h
Avg max wind
66 %
Avg humidity
Yellowknife Weather September
Move between months or click on a day
Temperatures trend during September in Yellowknife
See the weather trend as well as the moving average line
September weather in Yellowknife day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 18° /8° | 1 mm | 5 | |
| 2 Sept. | Patchy rain possible | 16° /8° | 1.2 mm | 4 | |
| 3 Sept. |  Overcast | 13° /6° | 0.1 mm | 3 | |
| 4 Sept. | Overcast | 12° /5° | 0 mm | 3 | |
| 5 Sept. | Overcast | 14° /4° | 0 mm | 4 | |
| 6 Sept. |  Partly cloudy | 18° /8° | 0 mm | 5 | |
| 7 Sept. |  Cloudy | 17° /8° | 0 mm | 4 | |
| 8 Sept. | Overcast | 16° /8° | 0 mm | 4 | |
| 9 Sept. | Cloudy | 17° /8° | 4.1 mm | 4 | |
| 10 Sept. |  Sunny | 15° /8° | 1.8 mm | 4 | |
| 11 Sept. | Sunny | 18° /8° | 0 mm | 5 | |
| 12 Sept. | Overcast | 19° /11° | 0.1 mm | 5 | |
| 13 Sept. | Overcast | 19° /10° | 0 mm | 5 | |
| 14 Sept. | Patchy rain possible | 17° /10° | 0.1 mm | 4 | |
| 15 Sept. | Partly cloudy | 16° /8° | 1.3 mm | 4 | |
| 16 Sept. | Partly cloudy | 16° /9° | 0.2 mm | 4 | |
| 17 Sept. | Overcast | 17° /8° | 0 mm | 4 | |
| 18 Sept. | Overcast | 16° /10° | 2.8 mm | 4 | |
| 19 Sept. |  Light drizzle | 13° /7° | 0.4 mm | 4 | |
| 20 Sept. | Overcast | 13° /7° | 0 mm | 3 | |
| 21 Sept. | Overcast | 15° /8° | 0 mm | 4 | |
| 22 Sept. | Partly cloudy | 13° /6° | 0 mm | 4 | |
| 23 Sept. | Sunny | 14° /7° | 0.3 mm | 4 | |
| 24 Sept. | Light rain shower | 12° /6° | 1.5 mm | 3 | |
| 25 Sept. | Patchy rain possible | 11° /5° | 0.6 mm | 3 | |
| 26 Sept. | Light rain | 10° /4° | 1.9 mm | 2 | |
| 27 Sept. | Patchy rain possible | 9° /3° | 0.1 mm | 3 | |
| 28 Sept. | Overcast | 9° /3° | 0 mm | 3 | |
| 29 Sept. |  Light snow | 9° /2° | 0.2 mm | 2 | |
| 30 Sept. | Overcast | 8° /2° | 0.5 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Yellowknife in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Yellowknife forecast closer to your planned date for the most up-to-date weather information.
Change Month
Yellowknife in September - FAQ
What are the expected maximum and minimum temperatures in Yellowknife during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Yellowknife during September?
In September, Yellowknife can expect light to moderate rainfall, totaling 45.5 mm across approximately 2 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Yellowknife during September?
The average wind speed in Yellowknife during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Yellowknife
Explore the daily rainfall trends and prepare for Yellowknifes September weather 💧
Quick links
More Yellowknife weather pages
You are here
Where is Yellowknife?Get accurate weather forecasts for Yellowknife, located at latitude 62.454 and longitude -114.372. Stay updated with localized weather information tailored for Yellowknife.
Found a mistake?
We appreciate your attention to details. Tell us here.