Weather on August 18 in Sydney
Historical weather data for August 18 in Sydney, Australia
Based on 55 years of data from SYDNEY (OBSERVATORY HILL)
About This Date
August 18th in Sydney, Australia typically brings mild summer weather, with average highs around 18°C and lows near 10°C. Over 55 years of records, the warmest August 18th was in 1988 (21°C average), while the coldest was 1973 (11°C) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 18th dates historically, with the wettest August 18th recording 10.54" of rain. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Sydney? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 14°C (57°F) | 8°C (47°F) | -- |
| 2024 | 16°C (61°F) | 13°C (56°F) | -- |
| 2023 | 18°C (64°F) | 12°C (54°F) | -- |
| 2022 | 21°C (69°F) | 11°C (51°F) | -- |
| 2021 | 18°C (64°F) | 10°C (50°F) | -- |
| 2020 | 22°C (71°F) | 11°C (52°F) | 0 mm |
| 2019 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 2018 | 23°C (73°F) | 9°C (48°F) | 0 mm |
| 2017 | 17°C (62°F) | 12°C (53°F) | 0 mm |
| 2016 | 23°C (73°F) | 12°C (53°F) | 0 mm |
| 2015 | 16°C (61°F) | 11°C (52°F) | 0 mm |
| 2014 | 16°C (60°F) | 11°C (52°F) | 55 mm |
| 2013 | 23°C (74°F) | 11°C (52°F) | 0 mm |
| 2012 | 18°C (65°F) | 9°C (49°F) | 0 mm |
| 2011 | 19°C (66°F) | 11°C (52°F) | 14 mm |
| 2010 | 20°C (68°F) | 7°C (44°F) | 0 mm |
| 2009 | 19°C (66°F) | 9°C (48°F) | 0 mm |
| 2008 | 16°C (60°F) | 6°C (42°F) | 0 mm |
| 2007 | 18°C (65°F) | 9°C (48°F) | 0 mm |
| 2006 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 2005 | 21°C (69°F) | 8°C (46°F) | 0 mm |
| 2004 | 12°C (54°F) | 9°C (49°F) | 268 mm |
| 2003 | 19°C (67°F) | 11°C (51°F) | 0 mm |
| 2002 | 16°C (61°F) | 9°C (49°F) | 4 mm |
| 2001 | 17°C (63°F) | 9°C (49°F) | 0 mm |
| 2000 | 17°C (62°F) | 9°C (49°F) | 0 mm |
| 1999 | 21°C (69°F) | 8°C (47°F) | 0 mm |
| 1998 | 18°C (65°F) | 13°C (55°F) | 101 mm |
| 1997 | 19°C (67°F) | 11°C (51°F) | 0 mm |
| 1996 | 19°C (67°F) | 8°C (46°F) | 0 mm |
| 1995 | 26°C (78°F) | 14°C (57°F) | 0 mm |
| 1994 | 15°C (59°F) | 9°C (48°F) | 17 mm |
| 1993 | 21°C (70°F) | 9°C (49°F) | 0 mm |
| 1992 | 16°C (61°F) | 12°C (53°F) | 0 mm |
| 1991 | 16°C (60°F) | 6°C (43°F) | 0 mm |
| 1990 | 16°C (61°F) | 7°C (45°F) | 0 mm |
| 1989 | 18°C (65°F) | 11°C (52°F) | 37 mm |
| 1988 | 24°C (76°F) | 18°C (65°F) | 1 mm |
| 1987 | 17°C (63°F) | 14°C (57°F) | 79 mm |
| 1986 | 18°C (65°F) | 9°C (48°F) | 0 mm |
| 1985 | 17°C (63°F) | 9°C (49°F) | 0 mm |
| 1984 | 20°C (68°F) | 11°C (51°F) | 0 mm |
| 1983 | 16°C (61°F) | 8°C (47°F) | 4 mm |
| 1982 | 18°C (64°F) | 9°C (48°F) | 1 mm |
| 1981 | 18°C (65°F) | 12°C (54°F) | 0 mm |
| 1980 | 19°C (66°F) | 10°C (50°F) | 2 mm |
| 1979 | 17°C (63°F) | 11°C (51°F) | 1 mm |
| 1978 | 13°C (56°F) | 9°C (49°F) | 0 mm |
| 1977 | 19°C (66°F) | 8°C (46°F) | 0 mm |
| 1976 | 18°C (65°F) | 11°C (52°F) | 0 mm |
| 1975 | 21°C (69°F) | 7°C (44°F) | 0 mm |
| 1974 | 18°C (65°F) | 8°C (46°F) | 0 mm |
| 1973 | 14°C (58°F) | 7°C (45°F) | 1 mm |
| 1972 | 16°C (61°F) | 7°C (45°F) | 6 mm |
| 1971 | 19°C (67°F) | 8°C (47°F) | 0 mm |