Annual mean 18°C · wettest around March · prevailing wind SE
Warmest
28.1 °C
Coldest
15.0 °C
Wettest
30%
Windiest
4.9 m/s
Prevailing
SE
4.1 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 Sydney over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 8°C. Sydney has no sharply defined rainy season: the chance of rain on a given day runs from 10% in September, the driest month, to 23% in March, the wettest. Winds in Sydney are highest in January, averaging 3.8 m/s (14 km/h), and lightest in May, at 2.8 m/s (10 km/h). The prevailing wind is from the SE. The clearest skies in Sydney come in September, when the sky is typically 56% covered; March is the cloudiest month, at 68%.
Month by month Sydney 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
27°C
21°C
27°C
17%
68%
3.8 m/s
53
51
25
February
26°C
19°C
26°C
18%
65%
3.5 m/s
60
52
28
March
25°C
18°C
24°C
23%
68%
3.3 m/s
68
44
36
April
22°C
14°C
21°C
13%
57%
2.9 m/s
85
20
63
May
19°C
11°C
17°C
13%
59%
2.8 m/s
68
2
84
June
16°C
8°C
13°C
12%
61%
2.9 m/s
34
0
85
July
16°C
8°C
12°C
13%
58%
3.1 m/s
30
0
84
August
17°C
8°C
14°C
12%
58%
3.0 m/s
46
0
86
September
20°C
11°C
17°C
10%
56%
3.3 m/s
68
5
81
October
22°C
14°C
20°C
14%
63%
3.4 m/s
77
17
68
November
24°C
17°C
22°C
13%
64%
3.6 m/s
76
27
58
December
26°C
19°C
25°C
11%
64%
3.5 m/s
63
46
37
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 Sydney weather by season
Year round, Sydney has days of about 16°C at their warmest in June, its coolest month, and 27°C in January, its warmest; the coolest hours of the day run from 8°C to 21°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around March and least likely around September. 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.
Sydney weather in winterJune to August
High 16°CLow 8°CRain 12%
Winter in Sydney has typical daily highs of about 16°C and lows of about 8°C, with a 12% chance of rain on a given day.
Sydney weather in springSeptember to November
High 22°CLow 14°CRain 12%
Spring in Sydney has typical daily highs of about 22°C and lows of about 14°C, with a 12% chance of rain on a given day.
Sydney weather in summerDecember to February
High 26°CLow 20°CRain 15%
Summer in Sydney has typical daily highs of about 26°C and lows of about 20°C, with a 15% chance of rain on a given day.
Sydney weather in autumnMarch to May
High 22°CLow 14°CRain 16%
Autumn in Sydney has typical daily highs of about 22°C and lows of about 14°C, with a 16% chance of rain on a given day.
When is the rainy season in Sydney?
Sydney has no sharply defined rainy season: the chance of rain on a given day runs from 10% in September, the driest month, to 23% in March, the wettest.
What time of year is Sydney windiest?
Winds in Sydney are highest in January, averaging 3.8 m/s (14 km/h), and lightest in May, at 2.8 m/s (10 km/h). The prevailing wind is from the SE.
What is the average temperature in Sydney year round?
The average temperature in Sydney over the whole year is 18°C. January is the hottest month, with highs of about 27°C; July is the coldest, with lows of about 8°C.