Historical Weather in Sydney, Australia
See 55+ years of weather history for any date in Sydney going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for Sydney, Australia, based on 55+ years of weather data.
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.
Sydney Weather by Month
The coldest January reading, 14°C (57°F) on January 19, 1986, has not been matched in 40 years.
The coldest February reading, 13°C (55°F) on February 13, 1996, has not been matched in 30 years.
7 of the 10 warmest Marches on record in Sydney have come since 2012.
The coldest April reading, 8°C (47°F) on April 27, 1978, has not been matched in 48 years.
May 2026 was the warmest May in 56 years of records, 1.8°C (3.2°F) above the long-run average.
The June heat record, 25°C (77°F) on June 26, 1991, has stood for 35 years.
July 2026 was the 2nd warmest July in 56 years of records, 1.5°C (2.8°F) above the long-run average.
5 of the 10 warmest Augusts on record in Sydney have come since 2012.
September 2025 was the 3rd warmest September in 55 years of records, 1.5°C (2.7°F) above the long-run average.
6 of the 10 warmest Octobers on record in Sydney have come since 2011.
7 of the 10 warmest Novembers on record in Sydney have come since 2011.
The coldest December reading, 11°C (52°F) on December 13, 1995, has not been matched in 31 years.
Source: NOAA GHCN-Daily, Sydney (Observatory Hill) (1971–2020); Sydney Harbour (Wedding Cake W (2020–2026). Records through 2026.