Weather on December 18 in Perth
Historical weather data for December 18 in Perth, Australia
Based on 54 years of data from PERTH REGIONAL OFFICE
About This Date
December 18th in Perth, Australia typically brings warm winter weather, with average highs around 29°C and lows near 18°C. Over 54 years of records, the warmest December 18th was in 1987 (31°C average), while the coldest was 2017 (17°C) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 9% of December 18th dates historically, with the wettest December 18th recording 2.22" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for December 18th in Perth? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 31°C (88°F) | 16°C (61°F) | 0 mm |
| 2024 | 29°C (84°F) | 19°C (66°F) | 0 mm |
| 2023 | 31°C (88°F) | 17°C (62°F) | 0 mm |
| 2022 | 33°C (92°F) | 18°C (65°F) | 0 mm |
| 2021 | 24°C (76°F) | 15°C (59°F) | 0 mm |
| 2020 | 31°C (88°F) | 17°C (62°F) | 0 mm |
| 2019 | -- | 21°C (69°F) | 0 mm |
| 2018 | 26°C (78°F) | 16°C (60°F) | 0 mm |
| 2017 | 21°C (70°F) | 12°C (54°F) | 56 mm |
| 2016 | 24°C (76°F) | 16°C (60°F) | 0 mm |
| 2015 | 26°C (78°F) | 17°C (62°F) | 0 mm |
| 2014 | 30°C (86°F) | 16°C (60°F) | 0 mm |
| 2013 | 28°C (82°F) | 19°C (66°F) | 0 mm |
| 2012 | 25°C (77°F) | 18°C (65°F) | 0 mm |
| 2011 | 26°C (78°F) | 17°C (63°F) | 0 mm |
| 2010 | 31°C (87°F) | 15°C (59°F) | 0 mm |
| 2009 | 34°C (93°F) | 16°C (60°F) | 0 mm |
| 2008 | 32°C (89°F) | 16°C (60°F) | 0 mm |
| 2007 | 24°C (76°F) | 17°C (62°F) | 15 mm |
| 2006 | 31°C (88°F) | 21°C (69°F) | 0 mm |
| 2005 | 33°C (91°F) | 16°C (60°F) | 0 mm |
| 2004 | 26°C (79°F) | 13°C (56°F) | 0 mm |
| 2003 | 22°C (71°F) | 19°C (67°F) | 8 mm |
| 2002 | 36°C (96°F) | 18°C (65°F) | 0 mm |
| 2001 | 26°C (79°F) | 15°C (59°F) | 0 mm |
| 2000 | 30°C (86°F) | 16°C (61°F) | 0 mm |
| 1999 | 34°C (94°F) | 20°C (68°F) | 0 mm |
| 1998 | 26°C (79°F) | 16°C (60°F) | 0 mm |
| 1997 | 28°C (82°F) | 15°C (59°F) | 0 mm |
| 1996 | 34°C (94°F) | 18°C (64°F) | 0 mm |
| 1995 | 32°C (90°F) | 15°C (59°F) | 0 mm |
| 1994 | 32°C (89°F) | 22°C (71°F) | 0 mm |
| 1993 | 32°C (89°F) | 18°C (64°F) | 0 mm |
| 1991 | 23°C (74°F) | 21°C (69°F) | 0 mm |
| 1990 | 23°C (74°F) | 14°C (58°F) | 0 mm |
| 1989 | 27°C (80°F) | 14°C (57°F) | 0 mm |
| 1988 | 34°C (93°F) | 19°C (66°F) | 6 mm |
| 1987 | 41°C (106°F) | 21°C (70°F) | 0 mm |
| 1986 | 35°C (95°F) | 19°C (66°F) | 0 mm |
| 1985 | 21°C (70°F) | 16°C (60°F) | 4 mm |
| 1984 | 24°C (76°F) | 14°C (58°F) | 0 mm |
| 1983 | 28°C (82°F) | 17°C (63°F) | 0 mm |
| 1982 | 36°C (96°F) | 18°C (65°F) | 0 mm |
| 1981 | 23°C (74°F) | 13°C (55°F) | 0 mm |
| 1980 | 24°C (76°F) | 21°C (69°F) | 0 mm |
| 1979 | 30°C (86°F) | 27°C (81°F) | 0 mm |
| 1978 | 31°C (88°F) | 19°C (67°F) | 0 mm |
| 1977 | 37°C (99°F) | 21°C (69°F) | 0 mm |
| 1976 | 37°C (98°F) | 23°C (73°F) | 0 mm |
| 1975 | 32°C (89°F) | 14°C (58°F) | 0 mm |
| 1974 | 33°C (91°F) | 19°C (67°F) | 0 mm |
| 1973 | 31°C (87°F) | 23°C (73°F) | 0 mm |
| 1972 | 27°C (81°F) | 20°C (68°F) | 0 mm |
| 1971 | 28°C (83°F) | 17°C (62°F) | 0 mm |