Sydney, New South Wales, Australia Climate Change Severity

52
High
The current climate change severity in Sydney is High, with a 22.2% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Sydney Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Sydney temperature has changed by around +0.8%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Sep. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
6941
-40.5%
cloudyCloudy
6749
-26.8%
rainyRainy
119123
3.3%
snowySnowy
00
0%
mistyMisty
00
0%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, Sydney has experienced measurable shifts in key climate parameters, contributing to the current severity score of 52 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

52/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Sydney experienced significant changes:

Temperature change of

+0.1 °C

Variation in annual rainfall

+59.5 %

Change in average humidity

-0.5 %

PM2.5 levels surged by

-23.7 %

Heatwave changed by

-3.06 day(s)

Coldwave changed by

-2.5 day(s)

Wind speeds changed by

+3.7 km/h

These indicators show that Sydney is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

Check how we calculate Climate Change Severity
Based on data from Jan. to Sep.

Sydney Weather Forecast 30 Days (October 2025)
Sydney, New South Wales, Australia

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 1, Oct.
sunnySunny
Temperature Icon26°/17°
Humidity Icon36%
Wind Icon32km/h
Thu. 2, Oct.
sunnySunny
Temperature Icon25°/14°
Humidity Icon37%
Wind Icon48km/h
Fri. 3, Oct.
sunnySunny
Temperature Icon22°/12°
Humidity Icon46%
Wind Icon26km/h
Sat. 4, Oct.
sunnySunny
Temperature Icon18°/14°
Humidity Icon60%
Wind Icon24km/h
Sun. 5, Oct.
sunnySunny
Temperature Icon24°/13°
Humidity Icon60%
Wind Icon24km/h
Mon. 6, Oct.
sunnySunny
Temperature Icon30°/18°
Humidity Icon44%
Wind Icon28km/h
Tue. 7, Oct.
partly cloudyPartly Cloudy
Temperature Icon27°/17°
Humidity Icon64%
Wind Icon16km/h
Wed. 8, Oct.
partly cloudyPartly Cloudy
Temperature Icon27°/21°
Humidity Icon49%
Wind Icon14km/h
Thu. 9, Oct.
sunnySunny
Temperature Icon32°/20°
Humidity Icon51%
Wind Icon30km/h
Fri. 10, Oct.
sunnySunny
Temperature Icon28°/19°
Humidity Icon58%
Wind Icon22km/h
Sat. 11, Oct.
sunnySunny
Temperature Icon28°/19°
Humidity Icon36%
Wind Icon46km/h
Sun. 12, Oct.
sunnySunny
Temperature Icon25°/14°
Humidity Icon41%
Wind Icon16km/h
Mon. 13, Oct.
sunnySunny
Temperature Icon21°/16°
Humidity Icon67%
Wind Icon24km/h
Tue. 14, Oct.
partly cloudyPartly Cloudy
Temperature Icon23°/16°
Humidity Icon75%
Wind Icon34km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon69%
Wind Icon23km/h
Thu. 16, Oct.
moderate rain at timesModerate rain at times
Temperature Icon22°/14°
Humidity Icon62%
Wind Icon23km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon66%
Wind Icon24km/h
Sat. 18, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon21°/15°
Humidity Icon68%
Wind Icon21km/h
Sun. 19, Oct.
moderate rain at timesModerate rain at times
Temperature Icon22°/15°
Humidity Icon70%
Wind Icon22km/h
Mon. 20, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon73%
Wind Icon23km/h
Tue. 21, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon23°/16°
Humidity Icon71%
Wind Icon23km/h
Wed. 22, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/15°
Humidity Icon72%
Wind Icon19km/h
Thu. 23, Oct.
moderate rain at timesModerate rain at times
Temperature Icon24°/16°
Humidity Icon70%
Wind Icon22km/h
Fri. 24, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/16°
Humidity Icon71%
Wind Icon23km/h
Sat. 25, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/15°
Humidity Icon68%
Wind Icon23km/h
Sun. 26, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/15°
Humidity Icon68%
Wind Icon25km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/15°
Humidity Icon69%
Wind Icon23km/h
Tue. 28, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon22°/15°
Humidity Icon69%
Wind Icon19km/h
Wed. 29, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon23°/16°
Humidity Icon69%
Wind Icon22km/h
Thu. 30, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon24°/15°
Humidity Icon67%
Wind Icon22km/h
Fri. 31, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/16°
Humidity Icon67%
Wind Icon24km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onThu. 9, Oct.

32.3°C

Low will be onFri. 3, Oct.

12.1°C

HumidityHumidity

High will be onTue. 14, Oct.

75%

Low will be onWed. 1, Oct.

36%

Wind SpeedWind Speed

High will be onThu. 2, Oct.

48.2km/h

Low will be onWed. 8, Oct.

13.7km/h

PrecipitationPrecipitation

High will be onSun. 26, Oct.

7.5mm

Low will be onMon. 6, Oct.

0.01mm

Ultraviolet IndexUV

High will be onThu. 9, Oct.

8

Low will be onThu. 2, Oct.

1.6

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