Weather on December 31 in Sydney
Historical weather data for December 31 in Sydney, Australia
Based on 55 years of data from SYDNEY (OBSERVATORY HILL)
About This Date
December 31st in Sydney, Australia typically brings pleasant winter weather, with average highs around 26°C and lows near 19°C. Over 55 years of records, the warmest December 31st was in 1985 (28°C average), while the coldest was 1984 (19°C) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 31st dates historically, with the wettest December 31st recording 1.54" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for December 31st in Sydney? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 22°C (72°F) | 18°C (65°F) | -- |
| 2024 | 25°C (77°F) | 22°C (71°F) | -- |
| 2023 | -- | 18°C (64°F) | -- |
| 2022 | 23°C (74°F) | 19°C (67°F) | -- |
| 2021 | 24°C (76°F) | 19°C (66°F) | -- |
| 2020 | 23°C (73°F) | 21°C (69°F) | -- |
| 2019 | 36°C (96°F) | 21°C (69°F) | 0" |
| 2018 | 31°C (87°F) | 22°C (71°F) | 0" |
| 2017 | 26°C (78°F) | 20°C (68°F) | 0.6" |
| 2016 | 30°C (86°F) | 24°C (75°F) | 0" |
| 2015 | 27°C (80°F) | 17°C (63°F) | 0" |
| 2014 | 25°C (77°F) | 19°C (67°F) | 0" |
| 2013 | 26°C (79°F) | 18°C (64°F) | 0" |
| 2012 | 27°C (81°F) | 18°C (65°F) | 0.02" |
| 2011 | 23°C (74°F) | 17°C (62°F) | 0" |
| 2010 | 27°C (81°F) | 22°C (71°F) | 0" |
| 2009 | 25°C (77°F) | 20°C (68°F) | 0" |
| 2008 | 32°C (89°F) | 19°C (67°F) | 0" |
| 2007 | 26°C (78°F) | 19°C (67°F) | 0" |
| 2006 | 23°C (74°F) | 18°C (65°F) | 0" |
| 2005 | 29°C (85°F) | 23°C (74°F) | 0" |
| 2004 | 24°C (76°F) | 16°C (60°F) | 0" |
| 2003 | 27°C (81°F) | 21°C (69°F) | 0" |
| 2002 | 27°C (80°F) | 19°C (67°F) | 0" |
| 2001 | 27°C (81°F) | 19°C (67°F) | 0" |
| 2000 | 24°C (75°F) | 18°C (65°F) | 0" |
| 1999 | 22°C (72°F) | 16°C (61°F) | 0.22" |
| 1998 | 24°C (76°F) | 21°C (70°F) | 0.2" |
| 1997 | 27°C (80°F) | 21°C (69°F) | 0" |
| 1996 | 25°C (77°F) | 16°C (61°F) | 0.14" |
| 1995 | 27°C (80°F) | 21°C (70°F) | 0.08" |
| 1994 | 26°C (78°F) | 18°C (65°F) | 0" |
| 1993 | 27°C (81°F) | 18°C (65°F) | 0" |
| 1992 | 26°C (78°F) | 20°C (68°F) | 0" |
| 1991 | 22°C (72°F) | 17°C (63°F) | 1.54" |
| 1990 | 30°C (86°F) | 23°C (73°F) | 0" |
| 1989 | 26°C (78°F) | 19°C (66°F) | 0" |
| 1988 | 26°C (78°F) | 18°C (65°F) | 0" |
| 1987 | 24°C (76°F) | 20°C (68°F) | 0" |
| 1986 | 27°C (81°F) | 19°C (67°F) | 0" |
| 1985 | 34°C (93°F) | 21°C (70°F) | 0" |
| 1984 | 21°C (70°F) | 16°C (61°F) | 0.56" |
| 1983 | 26°C (78°F) | 21°C (70°F) | 0" |
| 1982 | 27°C (81°F) | 22°C (71°F) | 0.04" |
| 1981 | 25°C (77°F) | 19°C (66°F) | 0" |
| 1980 | 25°C (77°F) | 18°C (64°F) | 1.34" |
| 1979 | 27°C (80°F) | 19°C (67°F) | 0" |
| 1978 | 24°C (75°F) | 15°C (59°F) | 0" |
| 1977 | 25°C (77°F) | 21°C (69°F) | 0" |
| 1976 | 25°C (77°F) | 19°C (66°F) | 0.08" |
| 1975 | 26°C (79°F) | 20°C (68°F) | 0" |
| 1974 | 24°C (76°F) | 19°C (67°F) | 0" |
| 1973 | 23°C (73°F) | 20°C (68°F) | 0.81" |
| 1972 | 23°C (73°F) | 19°C (67°F) | 0" |
| 1971 | 28°C (83°F) | 24°C (76°F) | 0" |