Weather on August 21 in Perth
Historical weather data for August 21 in Perth, Australia
Based on 53 years of data from PERTH REGIONAL OFFICE
About This Date
August 21st in Perth, Australia typically brings mild summer weather, with average highs around 19°C and lows near 9°C. Over 53 years of records, the warmest August 21st was in 2011 (20°C average), while the coldest was 2000 (9°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 58% of August 21st dates historically, with the wettest August 21st recording 2.22" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Perth? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 19°C (66°F) | 9°C (48°F) | 21 mm |
| 2024 | 21°C (69°F) | 11°C (51°F) | 11 mm |
| 2023 | 19°C (66°F) | 9°C (49°F) | 6 mm |
| 2022 | 20°C (68°F) | 6°C (43°F) | 0 mm |
| 2021 | 19°C (66°F) | 9°C (49°F) | 1 mm |
| 2020 | 19°C (66°F) | 6°C (43°F) | 0 mm |
| 2019 | 23°C (74°F) | 6°C (43°F) | 0 mm |
| 2018 | 19°C (67°F) | 12°C (53°F) | 4 mm |
| 2017 | 17°C (63°F) | 7°C (44°F) | 0 mm |
| 2016 | 18°C (65°F) | 7°C (45°F) | 4 mm |
| 2015 | 16°C (61°F) | 9°C (49°F) | 18 mm |
| 2014 | 22°C (71°F) | 14°C (58°F) | 15 mm |
| 2013 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 2012 | 21°C (69°F) | 16°C (60°F) | 7 mm |
| 2011 | 26°C (79°F) | 14°C (57°F) | 0 mm |
| 2010 | 18°C (65°F) | 7°C (44°F) | 1 mm |
| 2009 | 17°C (63°F) | 10°C (50°F) | 41 mm |
| 2008 | 18°C (64°F) | 8°C (47°F) | 0 mm |
| 2007 | 22°C (72°F) | 10°C (50°F) | 4 mm |
| 2006 | 23°C (73°F) | 10°C (50°F) | 1 mm |
| 2005 | 20°C (68°F) | 4°C (40°F) | 0 mm |
| 2004 | 19°C (66°F) | 12°C (53°F) | 23 mm |
| 2003 | 17°C (63°F) | 9°C (49°F) | 2 mm |
| 2002 | 20°C (68°F) | 6°C (43°F) | 0 mm |
| 2001 | 24°C (75°F) | 5°C (41°F) | 0 mm |
| 2000 | 17°C (63°F) | 1°C (34°F) | 1 mm |
| 1999 | 18°C (65°F) | 4°C (40°F) | 0 mm |
| 1998 | 17°C (62°F) | 9°C (48°F) | 9 mm |
| 1997 | 21°C (69°F) | 4°C (40°F) | 0 mm |
| 1996 | 17°C (62°F) | 10°C (50°F) | 26 mm |
| 1995 | 18°C (65°F) | 9°C (48°F) | 2 mm |
| 1994 | 21°C (69°F) | 7°C (44°F) | 0 mm |
| 1991 | 19°C (67°F) | 12°C (54°F) | 0 mm |
| 1990 | 17°C (62°F) | 8°C (47°F) | 0 mm |
| 1989 | 20°C (68°F) | 11°C (52°F) | 1 mm |
| 1988 | 18°C (65°F) | 8°C (46°F) | 1 mm |
| 1987 | 18°C (64°F) | 12°C (53°F) | 56 mm |
| 1986 | 19°C (67°F) | 12°C (53°F) | 3 mm |
| 1985 | 19°C (66°F) | 10°C (50°F) | 0 mm |
| 1984 | 18°C (65°F) | 14°C (57°F) | 18 mm |
| 1983 | 20°C (68°F) | 11°C (51°F) | 0 mm |
| 1982 | 22°C (72°F) | 11°C (51°F) | 0 mm |
| 1981 | 18°C (64°F) | 11°C (52°F) | 0 mm |
| 1980 | 18°C (64°F) | 13°C (56°F) | 35 mm |
| 1979 | 19°C (66°F) | 5°C (41°F) | 0 mm |
| 1978 | 22°C (72°F) | 10°C (50°F) | 0 mm |
| 1977 | 19°C (67°F) | 12°C (53°F) | 3 mm |
| 1976 | 16°C (61°F) | 6°C (43°F) | 7 mm |
| 1975 | 20°C (68°F) | 8°C (46°F) | 18 mm |
| 1974 | 19°C (66°F) | 9°C (49°F) | 1 mm |
| 1973 | 17°C (63°F) | 12°C (54°F) | 3 mm |
| 1972 | 18°C (64°F) | 13°C (56°F) | 13 mm |
| 1971 | 19°C (67°F) | 10°C (50°F) | 0 mm |