Weather on September 18 in Perth
Historical weather data for September 18 in Perth, Australia
Based on 53 years of data from PERTH REGIONAL OFFICE
About This Date
September 18th in Perth, Australia typically brings mild fall weather, with average highs around 21°C and lows near 11°C. Over 53 years of records, the warmest September 18th was in 1988 (23°C average), while the coldest was 1998 (11°C) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 47% of September 18th dates historically, with the wettest September 18th recording 1.76" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 18th in Perth? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 18°C (65°F) | 9°C (49°F) | 1.32" |
| 2024 | 24°C (75°F) | 9°C (49°F) | 0" |
| 2023 | 19°C (67°F) | 7°C (45°F) | 0" |
| 2022 | 21°C (70°F) | 12°C (53°F) | 0" |
| 2021 | 21°C (70°F) | 7°C (45°F) | 0" |
| 2020 | 23°C (73°F) | 8°C (46°F) | 0" |
| 2019 | 22°C (71°F) | 11°C (51°F) | 0" |
| 2018 | 19°C (67°F) | 4°C (40°F) | 0.02" |
| 2017 | 26°C (79°F) | 9°C (48°F) | 0" |
| 2016 | 19°C (66°F) | 4°C (39°F) | 0" |
| 2015 | 24°C (75°F) | 7°C (45°F) | 0" |
| 2014 | 24°C (75°F) | 11°C (52°F) | 0" |
| 2013 | 20°C (68°F) | 12°C (53°F) | 0.06" |
| 2012 | 22°C (71°F) | 16°C (60°F) | 1.08" |
| 2011 | 18°C (64°F) | 12°C (54°F) | 1.76" |
| 2010 | 19°C (66°F) | 9°C (48°F) | 0" |
| 2009 | 18°C (64°F) | 12°C (54°F) | 0.66" |
| 2008 | 20°C (68°F) | 13°C (56°F) | 0.18" |
| 2007 | 19°C (67°F) | 14°C (57°F) | 0.4" |
| 2006 | 19°C (67°F) | 11°C (51°F) | 0.46" |
| 2005 | 19°C (66°F) | 10°C (50°F) | 0.42" |
| 2004 | 22°C (72°F) | 9°C (48°F) | 0" |
| 2003 | 19°C (67°F) | 9°C (48°F) | 0" |
| 2002 | 25°C (77°F) | 5°C (41°F) | 0" |
| 2001 | 21°C (70°F) | 11°C (52°F) | 0" |
| 2000 | 19°C (66°F) | 9°C (49°F) | 0" |
| 1999 | 23°C (74°F) | 7°C (45°F) | 0" |
| 1998 | 17°C (63°F) | 4°C (39°F) | 0.24" |
| 1997 | 22°C (72°F) | 10°C (50°F) | 0.04" |
| 1996 | 19°C (67°F) | 14°C (57°F) | 0.6" |
| 1995 | 21°C (69°F) | 15°C (59°F) | 0.16" |
| 1994 | 22°C (71°F) | 13°C (55°F) | 0" |
| 1991 | 18°C (65°F) | 14°C (57°F) | 0.18" |
| 1990 | 17°C (63°F) | 12°C (53°F) | 0.5" |
| 1989 | 20°C (68°F) | 14°C (58°F) | 0.3" |
| 1988 | 32°C (90°F) | 13°C (55°F) | 0" |
| 1987 | 19°C (66°F) | 15°C (59°F) | 0.84" |
| 1986 | 19°C (66°F) | 11°C (51°F) | 0.98" |
| 1985 | 24°C (76°F) | 11°C (51°F) | 1.18" |
| 1984 | 21°C (70°F) | 10°C (50°F) | 0" |
| 1983 | 24°C (75°F) | 12°C (53°F) | 0" |
| 1982 | 19°C (67°F) | 8°C (46°F) | 0" |
| 1981 | 18°C (64°F) | 13°C (55°F) | 0.06" |
| 1980 | 19°C (66°F) | 9°C (48°F) | 0" |
| 1979 | 28°C (82°F) | 11°C (51°F) | 0" |
| 1978 | 21°C (70°F) | 9°C (49°F) | 0" |
| 1977 | 22°C (71°F) | 10°C (50°F) | 0" |
| 1976 | 18°C (64°F) | 13°C (55°F) | 1.64" |
| 1975 | 21°C (70°F) | 7°C (45°F) | 0" |
| 1974 | 20°C (68°F) | 17°C (62°F) | 0.3" |
| 1973 | 16°C (61°F) | 8°C (47°F) | 0.05" |
| 1972 | 21°C (69°F) | 7°C (45°F) | 0" |
| 1971 | 16°C (61°F) | 12°C (53°F) | 1.14" |