Harrismith Weather in May
Average highs run from 18°C on May 1 to 15°C on May 31, and lows from 4°C to 1°C. Normal precipitation for the month is 16 mm over about 3 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
- 17°C
- Average low
- 3°C
- Precipitation
- 16 mm
- Reanalysis high
- 24°CMay 1, 2012
- Reanalysis low
- -7°CMay 29, 1997
- Daylight
- 11 h 01 min to 10 h 28 min
- Cloud cover
- 33%
- Humidity
- 61%
- Dew point
- 0°C
- Wind
- 13.3 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 |
|---|---|---|---|---|---|
| May 1 | 18°C | 4°C | 24°C 2012 | -2°C 2016 | 20% |
| May 2 | 18°C | 4°C | 23°C 2012 | 0°C 2016 | 19% |
| May 3 | 18°C | 4°C | 23°C 2012 | -4°C 1992 | 18% |
| May 4 | 18°C | 4°C | 23°C 2012 | -2°C 2018 | 18% |
| May 5 | 18°C | 4°C | 22°C 2012 | -2°C 2013 | 17% |
| May 6 | 18°C | 4°C | 23°C 2007 | -4°C 2001 | 16% |
| May 7 | 18°C | 4°C | 22°C 2012 | -4°C 2002 | 16% |
| May 8 | 17°C | 3°C | 23°C 2007 | -5°C 2002 | 16% |
| May 9 | 17°C | 3°C | 22°C 2003 | -2°C 2006 | 16% |
| May 10 | 17°C | 3°C | 23°C 2007 | -1°C 2006 | 16% |
| May 11 | 17°C | 3°C | 20°C 2020 | -2°C 1998 | 14% |
| May 12 | 17°C | 3°C | 24°C 2007 | -3°C 1998 | 14% |
| May 13 | 17°C | 3°C | 23°C 2007 | -4°C 1998 | 14% |
| May 14 | 17°C | 3°C | 21°C 2007 | -2°C 1998 | 13% |
| May 15 | 17°C | 3°C | 20°C 2001 | -2°C 1998 | 12% |
| May 16 | 17°C | 3°C | 20°C 2008 | -1°C 2005 | 11% |
| May 17 | 17°C | 3°C | 21°C 2002 | -1°C 1998 | 11% |
| May 18 | 17°C | 3°C | 21°C 2002 | -1°C 2009 | 11% |
| May 19 | 17°C | 3°C | 21°C 2007 | -1°C 2011 | 11% |
| May 20 | 16°C | 2°C | 21°C 1992 | -2°C 2006 | 10% |
| May 21 | 16°C | 2°C | 20°C 2015 | -5°C 2007 | 10% |
| May 22 | 16°C | 2°C | 20°C 2004 | -6°C 2007 | 9% |
| May 23 | 16°C | 2°C | 22°C 2004 | -5°C 2007 | 8% |
| May 24 | 16°C | 2°C | 21°C 2004 | -4°C 2007 | 8% |
| May 25 | 16°C | 2°C | 21°C 2002 | -4°C 2007 | 7% |
| May 26 | 16°C | 2°C | 20°C 2014 | -4°C 2020 | 6% |
| May 27 | 15°C | 1°C | 21°C 2014 | -6°C 2020 | 6% |
| May 28 | 15°C | 1°C | 19°C 2005 | -5°C 1997 | 6% |
| May 29 | 15°C | 1°C | 19°C 2015 | -7°C 1997 | 6% |
| May 30 | 15°C | 1°C | 20°C 1998 | -5°C 1997 | 6% |
| May 31 | 15°C | 1°C | 20°C 2020 | -4°C 2011 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- May 1
- sunrise 6:30 AM, sunset 5:31 PM
- May 31
- sunrise 6:47 AM, sunset 5:15 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.