Sydney, New South Wales, Australia Climate Change Severity

48
High
The current climate change severity in Sydney is High, with a 7.3% 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 Jul. (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 -0.1%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
4830
-37.5%
cloudyCloudy
5036
-28.000000000000004%
rainyRainy
99106
7.07%
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 48 (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

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Sydney experienced significant changes:

Temperature change of

-0.03 °C

Variation in annual rainfall

+34.2 %

Change in average humidity

-0.4 %

PM2.5 levels surged by

-19.01 %

Heatwave changed by

-2.06 day(s)

Coldwave changed by

-2.3 day(s)

Wind speeds changed by

+3.1 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 Jul.

Sydney Weather Forecast 30 Days (August - September 2025)
Sydney, New South Wales, Australia

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Tue. 26, Aug.
sunnySunny
Temperature Icon21°/13°
Humidity Icon78%
Wind Icon25km/h
Wed. 27, Aug.
sunnySunny
Temperature Icon21°/13°
Humidity Icon63%
Wind Icon31km/h
Thu. 28, Aug.
sunnySunny
Temperature Icon18°/10°
Humidity Icon53%
Wind Icon32km/h
Fri. 29, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/10°
Humidity Icon56%
Wind Icon31km/h
Sat. 30, Aug.
sunnySunny
Temperature Icon13°/8°
Humidity Icon54%
Wind Icon38km/h
Sun. 31, Aug.
sunnySunny
Temperature Icon18°/7°
Humidity Icon61%
Wind Icon18km/h
Mon. 1, Sep.
sunnySunny
Temperature Icon19°/9°
Humidity Icon61%
Wind Icon10km/h
Tue. 2, Sep.
sunnySunny
Temperature Icon18°/9°
Humidity Icon58%
Wind Icon14km/h
Wed. 3, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/9°
Humidity Icon63%
Wind Icon11km/h
Thu. 4, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon17°/10°
Humidity Icon77%
Wind Icon20km/h
Fri. 5, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon18°/11°
Humidity Icon77%
Wind Icon22km/h
Sat. 6, Sep.
sunnySunny
Temperature Icon18°/13°
Humidity Icon64%
Wind Icon17km/h
Sun. 7, Sep.
sunnySunny
Temperature Icon18°/10°
Humidity Icon70%
Wind Icon21km/h
Mon. 8, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon18°/12°
Humidity Icon69%
Wind Icon20km/h
Tue. 9, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon20°/13°
Humidity Icon78%
Wind Icon11km/h
Wed. 10, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon19°/12°
Humidity Icon64%
Wind Icon20km/h
Thu. 11, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon20°/11°
Humidity Icon65%
Wind Icon17km/h
Sat. 13, Sep.
moderate rain at timesModerate rain at times
Temperature Icon20°/13°
Humidity Icon67%
Wind Icon18km/h
Sun. 14, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/13°
Humidity Icon69%
Wind Icon19km/h
Mon. 15, Sep.
moderate rain at timesModerate rain at times
Temperature Icon20°/13°
Humidity Icon66%
Wind Icon19km/h
Tue. 16, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon20°/13°
Humidity Icon65%
Wind Icon19km/h
Wed. 17, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon65%
Wind Icon20km/h
Thu. 18, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/13°
Humidity Icon67%
Wind Icon19km/h
Fri. 19, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon21°/13°
Humidity Icon63%
Wind Icon19km/h
Sat. 20, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon20°/13°
Humidity Icon64%
Wind Icon19km/h
Sun. 21, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon20°/13°
Humidity Icon70%
Wind Icon19km/h
Mon. 22, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon20°/13°
Humidity Icon67%
Wind Icon19km/h
Tue. 23, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon21°/13°
Humidity Icon64%
Wind Icon21km/h
Wed. 24, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon64%
Wind Icon19km/h
Thu. 25, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon66%
Wind Icon20km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onWed. 27, Aug.

21.4°C

Low will be onSun. 31, Aug.

6.5°C

HumidityHumidity

High will be onTue. 26, Aug.

78%

Low will be onThu. 28, Aug.

53%

Wind SpeedWind Speed

High will be onSat. 30, Aug.

38.2km/h

Low will be onMon. 1, Sep.

10.4km/h

PrecipitationPrecipitation

High will be onThu. 25, Sep.

6.6mm

Low will be onSat. 30, Aug.

0.03mm

Ultraviolet IndexUV

High will be onSat. 6, Sep.

6

Low will be onWed. 27, Aug.

0.8

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