Monthly climate guide
Yellowknife weather in August
With highs near 18°C (65°F) and lows around 11°C (52°F), August feels mild in Yellowknife. Rainfall averages about 52 mm (some rain) and the sky is often cloudy. Daytime highs are 2°C cooler than July and 8°C warmer than September.
What stands out in August
- Only one month is warmer in Yellowknife than August.
- Rain is above Yellowknife's usual level, by about 60%.
- It cools down fast from here: September is about 8°C cooler.
- August brings late summer to Yellowknife.
Avg high
18°C
65°F
Avg low
11°C
52°F
Rainfall
52 mm
some rain
Humidity
70%
relative
Sky
64%
cloud · often cloudy
Yellowknife weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -26°C / -14°F | -33°C / -28°F | 20 mm | 95% | 56% |
| February | -22°C / -8°F | -31°C / -24°F | 13 mm | 96% | 50% |
| March | -14°C / 7°F | -24°C / -11°F | 18 mm | 95% | 47% |
| April | -4°C / 25°F | -13°C / 9°F | 19 mm | 91% | 56% |
| May | 11°C / 51°F | 2°C / 36°F | 38 mm | 73% | 62% |
| June | 18°C / 64°F | 11°C / 51°F | 65 mm | 68% | 67% |
| July | 21°C / 69°F | 13°C / 56°F | 64 mm | 65% | 68% |
| August | 18°C / 65°F | 11°C / 52°F | 52 mm | 70% | 64% |
| September | 11°C / 51°F | 4°C / 39°F | 37 mm | 78% | 62% |
| October | -2°C / 29°F | -7°C / 19°F | 27 mm | 89% | 82% |
| November | -18°C / -1°F | -25°C / -12°F | 19 mm | 95% | 72% |
| December | -24°C / -12°F | -32°C / -25°F | 17 mm | 95% | 57% |
What to pack for August
- A warm sweater or fleece for layering
- A mid-weight jacket
- A small travel umbrella, just in case
Is August a good time to visit Yellowknife?
Compare the months in the chart above to find your ideal window.
Best time to visit Yellowknife →Other Canada cities in August
Cite or embed this data
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Yellowknife weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/canada/yellowknife/august
<a href="https://weathercompare.eu/weather/canada/yellowknife/august">Yellowknife weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/canada/yellowknife" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Yellowknife weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/canada/yellowknife/august">Yellowknife weather in August</a> – WeatherCompare</p>
Yellowknife in August: quick answers
Is August a good time to visit Yellowknife?
Yes. August is one of the best months for Yellowknife, with highs around 18°C and about 52 mm of rain.
How warm is Yellowknife in August?
Average highs are about 18°C (65°F) and average lows about 11°C (52°F), based on 10 years of daily data.
Does it rain a lot in Yellowknife in August?
Yellowknife typically gets around 52 mm of rain in August — some rain.
Figures are long-term averages for the area around Yellowknife (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.