Annual mean 19°C · wettest around July · prevailing wind SW
Warmest
29.4 °C
Coldest
15.6 °C
Wettest
54%
Windiest
6.1 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
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 19°C. February is the hottest month, with highs of about 29°C; August is the coldest, with lows of about 12°C. The rainy (wet) season in Perth runs from May to September, peaking in July with a 40% chance of rain on a given day. The dry season is October to April; December is the driest month, at 7%. Winds in Perth are highest in January, averaging 6.0 m/s (22 km/h), and lightest in May, at 4.4 m/s (16 km/h). The prevailing wind is from the SW. The clearest skies in Perth come in January, when the sky is typically 25% covered; July is the cloudiest month, at 60%.
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
29°C
21°C
26°C
8%
25%
6.0 m/s
55
42
32
February
29°C
21°C
26°C
9%
29%
5.8 m/s
52
44
30
March
27°C
19°C
25°C
10%
36%
5.4 m/s
63
41
37
April
24°C
17°C
21°C
20%
39%
4.8 m/s
76
21
61
May
20°C
14°C
17°C
27%
42%
4.4 m/s
71
3
78
June
18°C
12°C
14°C
33%
52%
4.4 m/s
46
1
79
July
17°C
12°C
13°C
40%
60%
4.9 m/s
29
0
75
August
17°C
12°C
13°C
35%
56%
4.9 m/s
33
0
76
September
19°C
13°C
15°C
23%
48%
4.8 m/s
48
3
77
October
21°C
14°C
17°C
17%
44%
5.3 m/s
63
10
73
November
24°C
17°C
21°C
15%
33%
5.7 m/s
67
24
59
December
28°C
20°C
24°C
7%
26%
6.0 m/s
61
36
40
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 17°C at their warmest in July, its coolest month, and 29°C in February, its warmest; the coolest hours of the day run from 12°C to 21°C through the year, and the average temperature over the year is 19°C around the clock. Rain is most likely around July and least likely around December. 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 winterJune to August
High 17°CLow 12°CRain 36%
Winter in Perth has typical daily highs of about 17°C and lows of about 12°C, with a 36% chance of rain on a given day.
Perth weather in springSeptember to November
High 21°CLow 15°CRain 19%
Spring in Perth has typical daily highs of about 21°C and lows of about 15°C, with a 19% chance of rain on a given day.
Perth weather in summerDecember to February
High 28°CLow 20°CRain 8%
Summer in Perth has typical daily highs of about 28°C and lows of about 20°C, with a 8% chance of rain on a given day.
Perth weather in autumnMarch to May
High 24°CLow 17°CRain 19%
Autumn in Perth has typical daily highs of about 24°C and lows of about 17°C, with a 19% chance of rain on a given day.
When is the rainy season in Perth?
The rainy (wet) season in Perth runs from May to September, peaking in July with a 40% chance of rain on a given day. The dry season is October to April; December is the driest month, at 7%.
What time of year is Perth windiest?
Winds in Perth are highest in January, averaging 6.0 m/s (22 km/h), and lightest in May, at 4.4 m/s (16 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 19°C. February is the hottest month, with highs of about 29°C; August is the coldest, with lows of about 12°C.