Weather on September 17 in Perth
Historical weather data for September 17 in Perth, Australia
Based on 54 years of data from PERTH REGIONAL OFFICE
About This Date
September 17th in Perth, Australia typically brings mild fall weather, with average highs around 21°C and lows near 11°C. Over 54 years of records, the warmest September 17th was in 2026 (24°C average), while the coldest was 1975 (11°C) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 48% of September 17th dates historically, with the wettest September 17th recording 1.04" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 17th in Perth? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 29°C (85°F) | 18°C (65°F) | 0 mm |
| 2025 | 20°C (68°F) | 11°C (52°F) | 2 mm |
| 2024 | 28°C (83°F) | 8°C (47°F) | 0 mm |
| 2023 | 19°C (67°F) | 10°C (50°F) | 1 mm |
| 2022 | 21°C (69°F) | 8°C (46°F) | 0 mm |
| 2021 | 18°C (64°F) | 6°C (43°F) | 4 mm |
| 2020 | 21°C (69°F) | 12°C (53°F) | 0 mm |
| 2019 | 23°C (73°F) | 12°C (54°F) | 0 mm |
| 2018 | 18°C (64°F) | 7°C (44°F) | 0 mm |
| 2017 | 22°C (71°F) | 15°C (59°F) | 0 mm |
| 2016 | 18°C (65°F) | 5°C (41°F) | 0 mm |
| 2015 | 26°C (79°F) | 7°C (45°F) | 0 mm |
| 2014 | 26°C (79°F) | 12°C (54°F) | 0 mm |
| 2013 | 18°C (64°F) | 10°C (50°F) | 12 mm |
| 2012 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 2011 | 21°C (69°F) | 9°C (49°F) | 6 mm |
| 2010 | 22°C (71°F) | 11°C (52°F) | 0 mm |
| 2009 | 19°C (67°F) | 11°C (52°F) | 1 mm |
| 2008 | 19°C (66°F) | 12°C (53°F) | 8 mm |
| 2007 | 22°C (71°F) | 10°C (50°F) | 0 mm |
| 2006 | 21°C (69°F) | 14°C (57°F) | 4 mm |
| 2005 | 18°C (65°F) | 12°C (54°F) | 14 mm |
| 2004 | 22°C (71°F) | 9°C (48°F) | 0 mm |
| 2003 | 20°C (68°F) | 8°C (47°F) | 0 mm |
| 2002 | 21°C (69°F) | 6°C (43°F) | 0 mm |
| 2001 | 22°C (71°F) | 7°C (45°F) | 1 mm |
| 2000 | 21°C (70°F) | 6°C (43°F) | 0 mm |
| 1999 | 21°C (70°F) | 7°C (44°F) | 0 mm |
| 1998 | 18°C (65°F) | 12°C (53°F) | 1 mm |
| 1997 | 22°C (71°F) | 11°C (51°F) | 0 mm |
| 1996 | 22°C (71°F) | 16°C (61°F) | 1 mm |
| 1995 | 19°C (67°F) | 13°C (55°F) | 0 mm |
| 1994 | 24°C (76°F) | 15°C (59°F) | 0 mm |
| 1991 | 19°C (66°F) | 10°C (50°F) | 0 mm |
| 1990 | 20°C (68°F) | 13°C (55°F) | 1 mm |
| 1989 | 22°C (71°F) | 9°C (49°F) | 0 mm |
| 1988 | 22°C (72°F) | 12°C (54°F) | 1 mm |
| 1987 | 23°C (74°F) | 11°C (52°F) | 0 mm |
| 1986 | 18°C (65°F) | 11°C (52°F) | 0 mm |
| 1985 | 18°C (65°F) | 13°C (55°F) | 2 mm |
| 1984 | 23°C (73°F) | 9°C (49°F) | 0 mm |
| 1983 | 22°C (71°F) | 12°C (53°F) | 0 mm |
| 1982 | 17°C (63°F) | 10°C (50°F) | 1 mm |
| 1981 | 18°C (65°F) | 14°C (57°F) | 6 mm |
| 1980 | 18°C (65°F) | 12°C (53°F) | 1 mm |
| 1979 | 21°C (69°F) | 8°C (47°F) | 0 mm |
| 1978 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 1977 | 19°C (67°F) | 13°C (56°F) | 3 mm |
| 1976 | 23°C (73°F) | 12°C (53°F) | 0 mm |
| 1975 | 17°C (62°F) | 6°C (42°F) | 6 mm |
| 1974 | 23°C (73°F) | 16°C (61°F) | 0 mm |
| 1973 | 16°C (61°F) | 13°C (55°F) | 10 mm |
| 1972 | 17°C (63°F) | 7°C (45°F) | 6 mm |
| 1971 | 19°C (66°F) | 13°C (56°F) | 26 mm |