Whyalla Weather in December
Average highs run from 28°C on December 1 to 30°C on December 31, and lows from 16°C to 18°C. Normal precipitation for the month is 25 mm over about 3 wet days.
December day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
December at a glance
- Average high
- 29°C
- Average low
- 17°C
- Precipitation
- 25 mm
- Reanalysis high
- 45°CDec 19, 2019
- Reanalysis low
- 11°CDec 6, 1995
- Daylight
- 14 h 10 min to 14 h 19 min
- Cloud cover
- 44%
- Humidity
- 51%
- Dew point
- 11°C
- Wind
- 20.5 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 |
|---|---|---|---|---|---|
| Dec 1 | 28°C | 16°C | 36°C 1996 | 12°C 2001 | 14% |
| Dec 2 | 28°C | 16°C | 35°C 2013 | 13°C 2005 | 14% |
| Dec 3 | 28°C | 16°C | 36°C 2013 | 12°C 2005 | 13% |
| Dec 4 | 28°C | 16°C | 36°C 1994 | 13°C 2019 | 14% |
| Dec 5 | 28°C | 16°C | 38°C 2015 | 12°C 2013 | 14% |
| Dec 6 | 28°C | 17°C | 41°C 2015 | 11°C 1995 | 14% |
| Dec 7 | 28°C | 17°C | 37°C 1999 | 13°C 2002 | 14% |
| Dec 8 | 28°C | 17°C | 39°C 2006 | 13°C 2001 | 14% |
| Dec 9 | 28°C | 17°C | 40°C 2006 | 13°C 1994 | 13% |
| Dec 10 | 28°C | 17°C | 39°C 2000 | 13°C 2001 | 14% |
| Dec 11 | 28°C | 17°C | 37°C 2005 | 13°C 1991 | 14% |
| Dec 12 | 29°C | 17°C | 38°C 1994 | 13°C 2001 | 14% |
| Dec 13 | 29°C | 17°C | 38°C 2017 | 14°C 2005 | 13% |
| Dec 14 | 29°C | 18°C | 37°C 1996 | 14°C 2018 | 13% |
| Dec 15 | 29°C | 18°C | 39°C 2002 | 14°C 2008 | 13% |
| Dec 16 | 29°C | 18°C | 40°C 2002 | 14°C 2010 | 12% |
| Dec 17 | 29°C | 18°C | 41°C 2002 | 13°C 2001 | 12% |
| Dec 18 | 29°C | 18°C | 43°C 2019 | 12°C 1991 | 12% |
| Dec 19 | 29°C | 18°C | 45°C 2019 | 13°C 1991 | 11% |
| Dec 20 | 29°C | 18°C | 43°C 2019 | 14°C 1995 | 10% |
| Dec 21 | 29°C | 18°C | 40°C 2002 | 14°C 2010 | 10% |
| Dec 22 | 29°C | 18°C | 37°C 2004 | 14°C 2010 | 9% |
| Dec 23 | 30°C | 18°C | 38°C 2017 | 14°C 1991 | 9% |
| Dec 24 | 30°C | 18°C | 39°C 2011 | 14°C 2006 | 9% |
| Dec 25 | 30°C | 18°C | 40°C 2016 | 13°C 2006 | 8% |
| Dec 26 | 30°C | 18°C | 40°C 2018 | 13°C 2006 | 8% |
| Dec 27 | 30°C | 18°C | 41°C 2019 | 14°C 1992 | 7% |
| Dec 28 | 30°C | 18°C | 41°C 2018 | 13°C 2004 | 6% |
| Dec 29 | 30°C | 18°C | 41°C 2019 | 14°C 1993 | 5% |
| Dec 30 | 30°C | 18°C | 42°C 2019 | 15°C 2008 | 5% |
| Dec 31 | 30°C | 18°C | 39°C 2007 | 13°C 2001 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+10:30).
- December 1
- sunrise 6:04 AM, sunset 8:14 PM
- December 31
- sunrise 6:13 AM, sunset 8:32 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.