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Northwest Territories (Yellowknife)
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Canada weather

Weather in Northwest Territories for September 2025

Your guide to Northwest Territories weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Northwest Territories has been nearly identical to the historical average, with a temperature of 16.3 °C (showing only a slight deviation of -0.1 °C).

  • The forecast for the next days in Northwest Territories predicts a temperature of 12.2 °C, which is cooler than the historical average.

  • In general, the average temperature in Northwest Territories at the beginning of September is 15.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.7 °C by the end of September.

    • Rain 🌧️

  • With an average of 2 rainy days, Northwest Territories experiences minimal rainfall in September.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/5°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
66 %
Avg humidity

Northwest Territories Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
18°
2
Patchy rain possible
16°
3
Overcast
13°
4
Overcast
12°
5
Overcast
14°
6
Partly cloudy
18°
7
Cloudy
17°
8
Overcast
16°
9
Cloudy
17°
10
Sunny
15°
11
Sunny
18°
12
Overcast
19°
13
Overcast
19°
14
Patchy rain possible
17°
15
Partly cloudy
16°
16
Sunny
14°
17
Sunny
20°
18
Sunny
19°
19
Sunny
16°
20
Partly cloudy
15°
21
Patchy rain possible
15°
22
Patchy rain possible
11°
23
Partly cloudy
13°
24
Moderate rain
9°
25
Cloudy
7°
26
Overcast
7°
27
Partly cloudy
8°
28
Partly cloudy
9°
29
Partly cloudy
8°
30
Overcast
6°

Temperatures trend during September in Northwest Territories

See the weather trend as well as the moving average line

September weather in Northwest Territories day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 18° /8° 1 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 1.2 mm 4
3 Sept. Overcast
Overcast
 13° /6° 0.1 mm 3
4 Sept. Overcast
Overcast
 12° /5° 0 mm 3
5 Sept. Overcast
Overcast
 14° /4° 0 mm 4
6 Sept. Partly cloudy
Partly cloudy
 18° /8° 0 mm 5
7 Sept. Cloudy
Cloudy
 17° /8° 0 mm 4
8 Sept. Overcast
Overcast
 16° /8° 0 mm 4
9 Sept. Cloudy
Cloudy
 17° /8° 4.1 mm 4
10 Sept. Sunny
Sunny
 15° /8° 1.8 mm 4
11 Sept. Sunny
Sunny
 18° /8° 0 mm 5
12 Sept. Overcast
Overcast
 19° /11° 0.1 mm 5
13 Sept. Overcast
Overcast
 19° /10° 0 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 0.1 mm 4
15 Sept. Partly cloudy
Partly cloudy
 16° /8° 1.3 mm 4
16 Sept. Sunny
Sunny
 14° /8° 0 mm 0.5
17 Sept. Sunny
Sunny
 20° /9° 0 mm 0.6
18 Sept. Sunny
Sunny
 19° /12° 0 mm 0.5
19 Sept. Sunny
Sunny
 16° /8° 0 mm 0.5
20 Sept. Partly cloudy
Partly cloudy
 15° /9° 0 mm 0
21 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.9 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 11° /7° 3.7 mm 2
23 Sept. Partly cloudy
Partly cloudy
 13° /8° 0.1 mm 3
24 Sept. Moderate rain
Moderate rain
 9° /8° 8.6 mm 2
25 Sept. Cloudy
Cloudy
 7° /4° 0 mm 2
26 Sept. Overcast
Overcast
 7° /5° 0 mm 2
27 Sept. Partly cloudy
Partly cloudy
 8° /2° 0 mm 3
28 Sept. Partly cloudy
Partly cloudy
 9° /4° 0 mm 3
29 Sept. Partly cloudy
Partly cloudy
 8° /2° 0 mm 2
30 Sept. Overcast
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.
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Northwest Territories in September - FAQ

What are the expected maximum and minimum temperatures in Northwest Territories 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 Northwest Territories during September?
In September, Northwest Territories 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 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
North Slave Region
Top locations in Northwest Territories
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Yellowknife
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Location coordinates 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.

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