Harrismith Weather in September
Average highs run from 19°C on September 1 to 22°C on September 30, and lows from 3°C to 6°C. Normal precipitation for the month is 30 mm over about 6 wet days.
September day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
September at a glance
- Average high
- 21°C
- Average low
- 5°C
- Precipitation
- 30 mm
- Reanalysis high
- 29°CSep 20, 2007
- Reanalysis low
- -5°CSep 1, 2013
- Daylight
- 11 h 32 min to 12 h 20 min
- Cloud cover
- 43%
- Humidity
- 48%
- Dew point
- -1°C
- Wind
- 16.9 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 |
|---|---|---|---|---|---|
| Sep 1 | 19°C | 3°C | 24°C 2003 | -5°C 2013 | 12% |
| Sep 2 | 20°C | 3°C | 26°C 2007 | -2°C 2012 | 12% |
| Sep 3 | 20°C | 3°C | 26°C 2007 | -1°C 2018 | 12% |
| Sep 4 | 20°C | 3°C | 26°C 2007 | 0°C 1995 | 11% |
| Sep 5 | 20°C | 4°C | 26°C 2007 | -4°C 1995 | 12% |
| Sep 6 | 20°C | 4°C | 25°C 2010 | -1°C 2004 | 13% |
| Sep 7 | 20°C | 4°C | 25°C 2014 | -4°C 2004 | 14% |
| Sep 8 | 20°C | 4°C | 27°C 2014 | -2°C 2018 | 14% |
| Sep 9 | 21°C | 4°C | 27°C 2008 | -3°C 2018 | 14% |
| Sep 10 | 21°C | 4°C | 27°C 2017 | -3°C 2018 | 14% |
| Sep 11 | 21°C | 4°C | 27°C 2007 | -5°C 1999 | 15% |
| Sep 12 | 21°C | 4°C | 28°C 2017 | -2°C 1999 | 16% |
| Sep 13 | 21°C | 5°C | 26°C 2014 | -3°C 2001 | 16% |
| Sep 14 | 21°C | 5°C | 28°C 2014 | -4°C 2001 | 17% |
| Sep 15 | 21°C | 5°C | 28°C 2014 | -1°C 2001 | 17% |
| Sep 16 | 21°C | 5°C | 29°C 2014 | 1°C 2011 | 19% |
| Sep 17 | 21°C | 5°C | 28°C 2019 | 2°C 2011 | 20% |
| Sep 18 | 21°C | 5°C | 28°C 2019 | -3°C 1996 | 20% |
| Sep 19 | 22°C | 5°C | 28°C 2019 | -4°C 1996 | 21% |
| Sep 20 | 22°C | 5°C | 29°C 2007 | -2°C 2004 | 21% |
| Sep 21 | 22°C | 5°C | 29°C 2007 | -3°C 2008 | 20% |
| Sep 22 | 22°C | 5°C | 27°C 2007 | -1°C 2013 | 21% |
| Sep 23 | 22°C | 5°C | 28°C 1994 | 1°C 1992 | 22% |
| Sep 24 | 22°C | 5°C | 28°C 1998 | 2°C 2012 | 23% |
| Sep 25 | 22°C | 5°C | 29°C 2015 | 0°C 2019 | 25% |
| Sep 26 | 22°C | 6°C | 28°C 2015 | -1°C 2019 | 25% |
| Sep 27 | 22°C | 6°C | 28°C 1995 | -1°C 2017 | 27% |
| Sep 28 | 22°C | 6°C | 27°C 1995 | -1°C 2001 | 27% |
| Sep 29 | 22°C | 6°C | 29°C 2015 | -3°C 2012 | 28% |
| Sep 30 | 22°C | 6°C | 28°C 2015 | -1°C 1999 | 29% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- September 1
- sunrise 6:18 AM, sunset 5:50 PM
- September 30
- sunrise 5:44 AM, sunset 6:04 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.