Sydney Weather in May
In May, Sydney averages a high of 21°C (69°F) and a low of 13°C (55°F), from 56 years of daily records (1971–2026).
21°C
Average high
69°F
13°C
Average low
55°F
29°C
Record high
84°F · May 10, 2012
6°C
Record low
42°F · May 29, 1987
What May Is Like in Sydney
- May 2026 was the warmest May in 56 years of records, 1.8°C (3.2°F) above the long-run average.
- 6 of the 10 warmest Mays on record in Sydney have come since 2012.
- The coldest May reading, 6°C (42°F) on May 29, 1987, has not been matched in 39 years.
- May in Sydney has become 0.7°C (1.2°F) warmer on average: the 2012–2026 average against 1970–1989.
At least 1 mm of rain falls on 27% of May days, and the month averages 103 mm in total.
Warmest: 2014 (23.1°C)Latest: 2026 (20.9°C)10-year averageLong-run average (20.6°C)
Look Up a Day in May
See the weather in Sydney on any May 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