Yellowknife Weather in August
Average highs run from 21°C on August 1 to 15°C on August 31, and lows from 13°C to 8°C. Normal precipitation for the month is 53 mm over about 9 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 18°C
- Average low
- 11°C
- Precipitation
- 53 mm
- Reanalysis high
- 30°CAug 4, 1994
- Reanalysis low
- 0°CAug 31, 1997
- Daylight
- 17 h 25 min to 14 h 27 min
- Cloud cover
- 64%
- Humidity
- 69%
- Dew point
- 9°C
- Wind
- 17.3 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 21°C | 13°C | 28°C 2003 | 4°C 2002 | 27% |
| Aug 2 | 21°C | 13°C | 27°C 1998 | 5°C 2002 | 28% |
| Aug 3 | 21°C | 13°C | 28°C 1998 | 7°C 2002 | 29% |
| Aug 4 | 21°C | 13°C | 30°C 1994 | 7°C 2018 | 28% |
| Aug 5 | 20°C | 13°C | 27°C 1997 | 8°C 2003 | 28% |
| Aug 6 | 20°C | 13°C | 29°C 1997 | 7°C 2004 | 28% |
| Aug 7 | 20°C | 13°C | 28°C 2008 | 8°C 2004 | 28% |
| Aug 8 | 20°C | 12°C | 28°C 2008 | 6°C 2003 | 28% |
| Aug 9 | 20°C | 12°C | 29°C 2008 | 4°C 2003 | 28% |
| Aug 10 | 20°C | 12°C | 29°C 2008 | 5°C 2007 | 27% |
| Aug 11 | 20°C | 12°C | 30°C 2017 | 6°C 2007 | 30% |
| Aug 12 | 19°C | 12°C | 28°C 2017 | 6°C 2007 | 31% |
| Aug 13 | 19°C | 12°C | 27°C 2017 | 6°C 2007 | 30% |
| Aug 14 | 19°C | 11°C | 26°C 2017 | 5°C 2005 | 30% |
| Aug 15 | 19°C | 11°C | 26°C 2003 | 5°C 2002 | 31% |
| Aug 16 | 18°C | 11°C | 26°C 2003 | 4°C 2002 | 32% |
| Aug 17 | 18°C | 11°C | 27°C 1999 | 4°C 2019 | 33% |
| Aug 18 | 18°C | 11°C | 27°C 1994 | 4°C 2002 | 33% |
| Aug 19 | 18°C | 11°C | 25°C 1993 | 0°C 2002 | 34% |
| Aug 20 | 17°C | 10°C | 24°C 2012 | 3°C 2002 | 34% |
| Aug 21 | 17°C | 10°C | 24°C 1993 | 1°C 1992 | 34% |
| Aug 22 | 17°C | 10°C | 25°C 1993 | 3°C 2018 | 34% |
| Aug 23 | 17°C | 10°C | 24°C 1993 | 4°C 2018 | 34% |
| Aug 24 | 16°C | 9°C | 23°C 2017 | 4°C 2013 | 34% |
| Aug 25 | 16°C | 9°C | 23°C 2005 | 3°C 2013 | 36% |
| Aug 26 | 16°C | 9°C | 24°C 2005 | 3°C 1991 | 34% |
| Aug 27 | 15°C | 8°C | 24°C 1997 | 1°C 1991 | 33% |
| Aug 28 | 15°C | 8°C | 23°C 2012 | 3°C 2000 | 33% |
| Aug 29 | 15°C | 8°C | 23°C 2009 | 2°C 2000 | 32% |
| Aug 30 | 15°C | 8°C | 24°C 2009 | 1°C 1997 | 31% |
| Aug 31 | 15°C | 8°C | 21°C 1996 | 0°C 1997 | 32% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- August 1
- sunrise 5:00 AM, sunset 10:25 PM
- August 31
- sunrise 6:23 AM, sunset 8:50 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.