Annual mean 10°C · wettest around December · prevailing wind SE
Warmest
20.2 °C
Coldest
4.9 °C
Wettest
44%
Windiest
3.3 m/s
Prevailing
SE
2.8 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 Sidney over the whole year is 10°C. August is the hottest month, with highs of about 20°C; February is the coldest, with lows of about 3°C. The rainy (wet) season in Sidney runs from October to March, peaking in December with a 41% chance of rain on a given day. The dry season is April to September; July is the driest month, at 19%. Winds in Sidney are highest in February, averaging 2.6 m/s (9 km/h), and lightest in September, at 1.9 m/s (7 km/h). The prevailing wind is from the SE. The clearest skies in Sidney come in July, when the sky is typically 31% covered; December is the cloudiest month, at 63%.
Month by month Sidney 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
6°C
4°C
2°C
41%
62%
2.5 m/s
0
0
17
February
6°C
3°C
2°C
37%
59%
2.6 m/s
0
0
18
March
8°C
5°C
5°C
33%
55%
2.4 m/s
1
0
34
April
11°C
7°C
8°C
28%
49%
2.4 m/s
7
0
59
May
15°C
10°C
12°C
24%
45%
2.4 m/s
33
1
81
June
17°C
13°C
15°C
22%
44%
2.4 m/s
49
4
82
July
20°C
15°C
18°C
19%
31%
2.3 m/s
74
10
78
August
20°C
15°C
19°C
21%
37%
2.1 m/s
76
15
74
September
17°C
12°C
15°C
26%
45%
1.9 m/s
56
3
83
October
12°C
9°C
10°C
32%
50%
2.0 m/s
12
0
70
November
8°C
6°C
5°C
39%
59%
2.5 m/s
1
0
37
December
6°C
4°C
2°C
41%
63%
2.5 m/s
0
0
15
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 Sidney weather by season
Year round, Sidney has days of about 6°C at their warmest in February, its coolest month, and 20°C in August, its warmest; the coolest hours of the day run from 3°C to 15°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around December and least likely around July. 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.
Sidney weather in winterDecember to February
High 6°CLow 4°CRain 39%
Winter in Sidney has typical daily highs of about 6°C and lows of about 4°C, with a 39% chance of rain on a given day.
Sidney weather in springMarch to May
High 11°CLow 7°CRain 28%
Spring in Sidney has typical daily highs of about 11°C and lows of about 7°C, with a 28% chance of rain on a given day.
Sidney weather in summerJune to August
High 19°CLow 14°CRain 21%
Summer in Sidney has typical daily highs of about 19°C and lows of about 14°C, with a 21% chance of rain on a given day.
Sidney weather in autumnSeptember to November
High 13°CLow 9°CRain 32%
Autumn in Sidney has typical daily highs of about 13°C and lows of about 9°C, with a 32% chance of rain on a given day.
When is the rainy season in Sidney?
The rainy (wet) season in Sidney runs from October to March, peaking in December with a 41% chance of rain on a given day. The dry season is April to September; July is the driest month, at 19%.
What time of year is Sidney windiest?
Winds in Sidney are highest in February, averaging 2.6 m/s (9 km/h), and lightest in September, at 1.9 m/s (7 km/h). The prevailing wind is from the SE.
What is the average temperature in Sidney year round?
The average temperature in Sidney over the whole year is 10°C. August is the hottest month, with highs of about 20°C; February is the coldest, with lows of about 3°C.