Yellowknife weather in August
August in Yellowknife: nice, a little rain — an excellent time to visit.
#3 of 12 months in Yellowknife · #290 of 897 destinations to visit in August · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Yellowknife in August
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Yellowknife climate normals — August
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Rainfall | 44 mm / 1.7 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 11.2 h/day | |
| Daylight | 16 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 88 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Yellowknife in August — FAQ
- Is August a good time to visit Yellowknife?
- August in Yellowknife: nice, a little rain — an excellent time to visit. It ranks #3 of 12 months for Yellowknife on SeasonMap's comfort score (87/100).
- What is the weather like in Yellowknife in August?
- In August, Yellowknife averages a daily high of 19.4°C and a low of 12.4°C, with about 44.1 mm of rain over roughly 9 rainy days.
- What is the air quality in Yellowknife in August?
- Yellowknife has a mean US Air Quality Index of about 88 in August.