Measurements:
°C
°F
CURRENT WEATHER
17:47
Yellowknife
38°F
NW 6 mph
Feels like: 34°F
Precip: 8%
World Resorts Canada Yellowknife Weather

7 Day Weather Forecast

09.28
mon
DAY
34°F
W 7 mph
precip
3%
NIGHT
30°F
W 11 mph
precip
22%
09.29
tue
DAY
32°F
SW 11 mph
precip
46%
NIGHT
30°F
S 7 mph
precip
20%
09.30
wed
DAY
34°F
SE 12 mph
precip
3%
NIGHT
34°F
SE 6 mph
precip
20%
10.01
thu
DAY
36°F
S 2 mph
precip
7%
NIGHT
34°F
W 7 mph
precip
22%
10.02
fri
DAY
34°F
W 14 mph
precip
28%
NIGHT
28°F
W 14 mph
precip
72%
10.03
sat
DAY
28°F
S 14 mph
precip
38%
NIGHT
18°F
W 6 mph
precip
30%
10.04
sun
DAY
30°F
NW 19 mph
precip
51%
NIGHT
38°F
N 17 mph
precip
27%

Yellowknife Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Yellowknife was 11.3°F. The maximum and minimum values were 9.0°F and 13.8°F respectively.

Yellowknife on the Weather Map

Best Time to Visit Yellowknife
The most sunny months:
June 14 days
July 14 days
August 11 days
The most warm months:
July 69.4 °F
August 65.5 °F
June 62.1 °F
Warmest sea temperature:
August 60.5 °F
July 59.3 °F
September 54.6 °F
The most cold months:
January -15.3 °F
February -15.0 °F
December -13.2 °F
The most rainy months:
June 1 day
July 1 day
August 1 day
The most windy months:
October 10 mph
May 9 mph
September 9 mph
more details