Sydney Weather in October
In October, Sydney averages a high of 22°C (72°F) and a low of 15°C (58°F), from 55 years of daily records (1971–2026).
22°C
Average high
72°F
15°C
Average low
58°F
37°C
Record high
99°F · October 25, 2019
7°C
Record low
45°F · October 13, 1987
What October Is Like in Sydney
- 6 of the 10 warmest Octobers on record in Sydney have come since 2011.
- October 2025 was the 3rd warmest October in 55 years of records, 1.8°C (3.3°F) above the long-run average.
- The coldest October reading, 7°C (45°F) on October 13, 1987, has not been matched in 39 years.
- October is the least predictable month in Sydney: daytime highs vary more from day to day and year to year than in any other month.
At least 1 mm of rain falls on 26% of October days, and the month averages 81 mm in total.
Warmest: 1988 (25.1°C)Latest: 2025 (23.7°C)10-year averageLong-run average (22.4°C)
Look Up a Day in October
See the weather in Sydney on any October date, year by year.
Source: NOAA GHCN-Daily, Sydney (Observatory Hill) (1971–2020); Sydney Harbour (Wedding Cake W (2020–2026). Averages cover 1971–2026. How we compute this