Yellowknife
September
Weather in Yellowknife for September 2025
Your guide to Yellowknife weather in September - trends and predictions
In general, the average temperature in Yellowknife 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.
Yellowknife sees moderate rainfall in September, averaging 6 rainy days.
Snowfall in Yellowknife during September is quite rare, with fewer than 2 snowy days on average.
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23
Dry days
6
Rainy days
1
Snow days
15°/7°
Temperatures
23 km/h
Avg max wind
64 %
Avg humidity
Yellowknife in September average weather
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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° |
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Temperatures trend during September in Yellowknife
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September weather day by day
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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 | |
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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.
Yellowknife in September - FAQ
What are the expected maximum and minimum temperatures in Yellowknife during September?
During September, expect a variety of temperatures with highs around 15° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Yellowknife during September?
Expect minimal rainfall in Yellowknife during September, with a total of 17.5 mm over approximately 6 days. This minimal precipitation is unlikely to significantly impact plans.
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 💧
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