Annual mean 9°C · wettest around February · prevailing wind SW
Warmest
17.7 °C
Coldest
3.8 °C
Wettest
31%
Windiest
6.8 m/s
Prevailing
SW
5.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Perth over the whole year is 9°C. July is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 3°C. Perth has no sharply defined rainy season: the chance of rain on a given day runs from 13% in April, the driest month, to 26% in February, the wettest. Winds in Perth are highest in February, averaging 5.8 m/s (21 km/h), and lightest in May, at 4.3 m/s (15 km/h). The prevailing wind is from the SW. The clearest skies in Perth come in April, when the sky is typically 60% covered; December is the cloudiest month, at 66%.
Month by month Perth climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
4°C
3°C
-1°C
21%
64%
5.3 m/s
0
0
6
February
5°C
3°C
-1°C
26%
62%
5.8 m/s
0
0
9
March
7°C
3°C
2°C
20%
65%
4.9 m/s
0
0
20
April
9°C
5°C
4°C
13%
60%
4.6 m/s
2
0
37
May
13°C
8°C
9°C
17%
62%
4.3 m/s
14
0
63
June
15°C
11°C
11°C
16%
65%
4.5 m/s
30
0
74
July
17°C
12°C
14°C
17%
64%
4.3 m/s
48
2
76
August
16°C
12°C
13°C
20%
64%
4.4 m/s
44
1
76
September
15°C
10°C
11°C
19%
63%
4.7 m/s
26
0
71
October
11°C
8°C
6°C
26%
63%
4.8 m/s
3
0
52
November
7°C
5°C
2°C
23%
63%
4.4 m/s
0
0
26
December
5°C
3°C
0°C
24%
66%
4.8 m/s
0
0
10
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Perth weather by season
Year round, Perth has days of about 4°C at their warmest in January, its coolest month, and 17°C in July, its warmest; the coolest hours of the day run from 3°C to 12°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around February and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Perth weather in winterDecember to February
High 5°CLow 3°CRain 24%
Winter in Perth has typical daily highs of about 5°C and lows of about 3°C, with a 24% chance of rain on a given day.
Perth weather in springMarch to May
High 10°CLow 5°CRain 17%
Spring in Perth has typical daily highs of about 10°C and lows of about 5°C, with a 17% chance of rain on a given day.
Perth weather in summerJune to August
High 16°CLow 12°CRain 18%
Summer in Perth has typical daily highs of about 16°C and lows of about 12°C, with a 18% chance of rain on a given day.
Perth weather in autumnSeptember to November
High 11°CLow 8°CRain 23%
Autumn in Perth has typical daily highs of about 11°C and lows of about 8°C, with a 23% chance of rain on a given day.
When is the rainy season in Perth?
Perth has no sharply defined rainy season: the chance of rain on a given day runs from 13% in April, the driest month, to 26% in February, the wettest.
What time of year is Perth windiest?
Winds in Perth are highest in February, averaging 5.8 m/s (21 km/h), and lightest in May, at 4.3 m/s (15 km/h). The prevailing wind is from the SW.
What is the average temperature in Perth year round?
The average temperature in Perth over the whole year is 9°C. July is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 3°C.