Weather in Perth in May
May in Perth is mild with average temperatures around 18.5°C (65.3°F). Moderate rainfall of 84mm spread over 10 days.
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
21.0°C
69.8°F
Low
16.0°C
60.8°F
Precipitation
84 mm
3.3 inches
~10 rainy days
Conditions
Humidity
69%
Comparison to Adjacent Months
May is 50mm wetter than April.
May is 30mm drier than June.