Northwest Territories (Yellowknife)
September
Weather in Northwest Territories for September 2025
Your guide to Northwest Territories weather in September - trends and predictions
In general, the average temperature in Northwest Territories at the beginning of September is 15.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.4 °C by the end of September.
Northwest Territories experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 22.7 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
14°/7°
Temperatures
23 km/h
Avg max wind
66 %
Avg humidity
Northwest Territories in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2 17° | 3  11° | 4 12° | 5 14° | 6 18° | 7  18° |
| 8 17° | 9 15° | 10  16° | 11 17° | 12 17° | 13 18° | 14 17° |
| 15  17° | 16 17° | 17 16° | 18 15° | 19  11° | 20 11° | 21 13° |
| 22 15° | 23 15° | 24 13° | 25 11° | 26 9° | 27 6° | 28 7° |
| 29  7° | 30 6° |
You can click on date
Access Northwest Territories weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Northwest Territories
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 20° /11° | 1.5 mm | 5 | |
| 2 Sept. | Patchy rain possible | 17° /10° | 1.8 mm | 4 | |
| 3 Sept. | Overcast | 11° /6° | 0.1 mm | 3 | |
| 4 Sept. | Overcast | 12° /5° | 0 mm | 3 | |
| 5 Sept. | Overcast | 14° /4° | 0 mm | 4 | |
| 6 Sept. | Overcast | 18° /8° | 0 mm | 5 | |
| 7 Sept. | Cloudy | 18° /9° | 0 mm | 4 | |
| 8 Sept. | Overcast | 17° /9° | 0 mm | 4 | |
| 9 Sept. | Cloudy | 15° /8° | 5.4 mm | 4 | |
| 10 Sept. | Sunny | 16° /8° | 1.5 mm | 4 | |
| 11 Sept. | Sunny | 17° /8° | 0 mm | 5 | |
| 12 Sept. | Overcast | 17° /10° | 0.1 mm | 4 | |
| 13 Sept. | Overcast | 18° /9° | 0 mm | 5 | |
| 14 Sept. | Cloudy | 17° /9° | 0.1 mm | 4 | |
| 15 Sept. | Partly cloudy | 17° /8° | 0 mm | 5 | |
| 16 Sept. | Partly cloudy | 17° /10° | 0.3 mm | 5 | |
| 17 Sept. | Overcast | 16° /8° | 0 mm | 4 | |
| 18 Sept. | Overcast | 15° /8° | 4.2 mm | 4 | |
| 19 Sept. | Light drizzle | 11° /7° | 0.6 mm | 3 | |
| 20 Sept. | Patchy rain possible | 11° /6° | 0 mm | 3 | |
| 21 Sept. | Overcast | 13° /6° | 0 mm | 4 | |
| 22 Sept. | Partly cloudy | 15° /7° | 0 mm | 5 | |
| 23 Sept. | Sunny | 15° /6° | 0 mm | 5 | |
| 24 Sept. | Light rain shower | 13° /6° | 2.2 mm | 3 | |
| 25 Sept. | Patchy rain possible | 11° /5° | 1 mm | 3 | |
| 26 Sept. | Light rain | 9° /4° | 2.8 mm | 2 | |
| 27 Sept. | Patchy rain possible | 6° /3° | 0.1 mm | 2 | |
| 28 Sept. | Overcast | 7° /2° | 0 mm | 2 | |
| 29 Sept. | Light snow | 7° /2° | 0.2 mm | 2 | |
| 30 Sept. | Overcast | 6° /0° | 0.7 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Northwest Territories 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 Northwest Territories forecast closer to your planned date for the most up-to-date weather information.
Northwest Territories in September - FAQ
What are the expected maximum and minimum temperatures in Northwest Territories during September?
During September, expect a variety of temperatures with highs around 14° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Northwest Territories during September?
In September, Northwest Territories can expect light to moderate rainfall, totaling 22.7 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
Will it snow in Northwest Territories in September 2025?
Northwest Territories typically sees 0.005 cm of snowfall during September.
What are the typical wind conditions in Northwest Territories during September?
The average wind speed in Northwest Territories during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Northwest Territories
Explore the daily rainfall trends and prepare for Northwest Territoriess September weather 💧
Provinces in Northwest Territories
Select a province for an accurate weather forecast
Top locations in Northwest Territories
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Northwest Territories?Get accurate weather forecasts for Northwest Territories, located at latitude 62.454 and longitude -114.372. Stay updated with localized weather information tailored for Northwest Territories.
Found a mistake?
We appreciate your attention to details. Tell us here.