Yellowknife Weather in May
Average highs run from 4°C on May 1 to 15°C on May 31, and lows from -3°C to 7°C. Normal precipitation for the month is 43 mm over about 9 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 10°C
- Average low
- 2°C
- Precipitation
- 43 mm
- Reanalysis high
- 25°CMay 21, 1998
- Reanalysis low
- -19°CMay 4, 2002
- Daylight
- 16 h 30 min to 19 h 12 min
- Cloud cover
- 62%
- Humidity
- 75%
- Dew point
- 2°C
- Wind
- 19.1 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 |
|---|---|---|---|---|---|
| May 1 | 4°C | -3°C | 16°C 2016 | -16°C 2019 | 17% |
| May 2 | 4°C | -3°C | 15°C 2016 | -13°C 2011 | 18% |
| May 3 | 5°C | -2°C | 21°C 2016 | -15°C 2002 | 18% |
| May 4 | 6°C | -2°C | 18°C 2016 | -19°C 2002 | 19% |
| May 5 | 6°C | -1°C | 15°C 2007 | -12°C 2002 | 21% |
| May 6 | 6°C | -1°C | 16°C 1994 | -13°C 2004 | 22% |
| May 7 | 7°C | -1°C | 15°C 1998 | -16°C 2004 | 24% |
| May 8 | 7°C | 0°C | 18°C 1991 | -11°C 2004 | 25% |
| May 9 | 7°C | 0°C | 18°C 1991 | -12°C 2004 | 25% |
| May 10 | 8°C | 0°C | 18°C 1991 | -10°C 2004 | 25% |
| May 11 | 8°C | 0°C | 17°C 1991 | -10°C 2004 | 26% |
| May 12 | 8°C | 1°C | 19°C 1991 | -6°C 2004 | 26% |
| May 13 | 9°C | 1°C | 21°C 2015 | -7°C 2020 | 27% |
| May 14 | 9°C | 1°C | 22°C 2015 | -8°C 2020 | 27% |
| May 15 | 9°C | 2°C | 22°C 2016 | -5°C 2009 | 28% |
| May 16 | 10°C | 2°C | 19°C 2011 | -6°C 2009 | 27% |
| May 17 | 10°C | 2°C | 20°C 1991 | -8°C 2009 | 27% |
| May 18 | 10°C | 3°C | 21°C 2015 | -6°C 2004 | 26% |
| May 19 | 11°C | 3°C | 20°C 1998 | -8°C 2004 | 27% |
| May 20 | 11°C | 3°C | 20°C 1998 | -3°C 2004 | 27% |
| May 21 | 11°C | 3°C | 25°C 1998 | -4°C 2002 | 27% |
| May 22 | 12°C | 4°C | 22°C 2018 | -6°C 2004 | 25% |
| May 23 | 12°C | 4°C | 22°C 2015 | -3°C 2004 | 26% |
| May 24 | 12°C | 4°C | 21°C 2013 | -2°C 2020 | 27% |
| May 25 | 13°C | 5°C | 23°C 1994 | -3°C 2009 | 27% |
| May 26 | 13°C | 5°C | 21°C 2007 | -1°C 2002 | 26% |
| May 27 | 14°C | 5°C | 21°C 2012 | -3°C 2002 | 27% |
| May 28 | 14°C | 6°C | 22°C 2012 | -2°C 2002 | 27% |
| May 29 | 14°C | 6°C | 23°C 2005 | -2°C 2000 | 28% |
| May 30 | 14°C | 6°C | 23°C 2012 | -2°C 1991 | 28% |
| May 31 | 15°C | 7°C | 24°C 2017 | 1°C 2002 | 29% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 5:21 AM, sunset 9:51 PM
- May 31
- sunrise 4:00 AM, sunset 11:12 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.