Perth Weather in December
Average highs run from 29°C on December 1 to 34°C on December 31, and lows from 13°C to 16°C. Normal precipitation for the month is 12 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
- 32°C
- Average low
- 15°C
- Precipitation
- 12 mm
- Reanalysis high
- 44°CDec 26, 2007
- Reanalysis low
- 7°CDec 1, 2020
- Daylight
- 14 h 05 min to 14 h 13 min
- Cloud cover
- 31%
- Humidity
- 45%
- Dew point
- 8°C
- Wind
- 19.8 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 | 29°C | 13°C | 34°C 2019 | 7°C 2020 | 12% |
| Dec 2 | 29°C | 13°C | 37°C 2019 | 8°C 2002 | 11% |
| Dec 3 | 30°C | 13°C | 41°C 2019 | 9°C 2002 | 10% |
| Dec 4 | 30°C | 13°C | 41°C 2019 | 8°C 2002 | 10% |
| Dec 5 | 30°C | 13°C | 41°C 2019 | 9°C 2020 | 10% |
| Dec 6 | 30°C | 14°C | 42°C 2019 | 7°C 2007 | 11% |
| Dec 7 | 30°C | 14°C | 35°C 2000 | 9°C 2007 | 10% |
| Dec 8 | 31°C | 14°C | 40°C 2020 | 9°C 2015 | 9% |
| Dec 9 | 31°C | 14°C | 40°C 1994 | 8°C 2003 | 9% |
| Dec 10 | 31°C | 14°C | 41°C 2016 | 9°C 2003 | 10% |
| Dec 11 | 31°C | 15°C | 39°C 2017 | 10°C 2008 | 10% |
| Dec 12 | 32°C | 15°C | 42°C 2002 | 11°C 2005 | 10% |
| Dec 13 | 32°C | 15°C | 41°C 2019 | 10°C 1993 | 10% |
| Dec 14 | 32°C | 15°C | 43°C 2019 | 10°C 1993 | 9% |
| Dec 15 | 32°C | 15°C | 43°C 2019 | 9°C 2005 | 9% |
| Dec 16 | 32°C | 15°C | 43°C 2013 | 11°C 2014 | 9% |
| Dec 17 | 33°C | 15°C | 42°C 1993 | 11°C 2014 | 9% |
| Dec 18 | 33°C | 15°C | 41°C 1993 | 11°C 2004 | 9% |
| Dec 19 | 33°C | 15°C | 42°C 2002 | 11°C 2012 | 8% |
| Dec 20 | 33°C | 16°C | 43°C 2002 | 11°C 1992 | 7% |
| Dec 21 | 33°C | 16°C | 42°C 2016 | 9°C 2000 | 7% |
| Dec 22 | 33°C | 16°C | 41°C 2018 | 9°C 2000 | 7% |
| Dec 23 | 33°C | 16°C | 43°C 1997 | 11°C 1992 | 6% |
| Dec 24 | 34°C | 16°C | 42°C 2020 | 8°C 2005 | 6% |
| Dec 25 | 34°C | 16°C | 42°C 2020 | 10°C 1996 | 5% |
| Dec 26 | 34°C | 16°C | 44°C 2007 | 12°C 2015 | 5% |
| Dec 27 | 34°C | 16°C | 42°C 2000 | 12°C 1991 | 5% |
| Dec 28 | 34°C | 16°C | 42°C 2015 | 11°C 2005 | 5% |
| Dec 29 | 34°C | 16°C | 42°C 2009 | 11°C 2016 | 5% |
| Dec 30 | 34°C | 16°C | 42°C 1994 | 12°C 2016 | 5% |
| Dec 31 | 34°C | 16°C | 42°C 2012 | 11°C 2002 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+8).
- December 1
- sunrise 5:03 AM, sunset 7:08 PM
- December 31
- sunrise 5:13 AM, sunset 7:26 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.