Weather in Perth in December
December in Perth is mild with average temperatures around 21.4°C (70.5°F). Light rainfall with only 12mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
24.7°C
76.5°F
Low
18.0°C
64.4°F
Precipitation
12 mm
0.5 inches
~3 rainy days
Conditions
Humidity
65%