Perth Weather in December
In December, Perth averages a high of 29°C (83°F) and a low of 17°C (62°F), from 54 years of daily records (1971–2026).
29°C
Average high
83°F
17°C
Average low
62°F
44°C
Record high
112°F · December 26, 2007
7°C
Record low
44°F · December 1, 2020
What December Is Like in Perth
- 7 of the 10 warmest Decembers on record in Perth have come since 2011.
- December in Perth has become 1.5°C (2.6°F) warmer on average: the 2011–2025 average against 1970–1989.
- A typical December brings 4.1 days above 35°C (95°F).
- December is Perth's driest month, averaging 10 mm of rain against 154 mm in the wettest.
At least 1 mm of rain falls on 6% of December days, and the month averages 10 mm in total.
Warmest: 2019 (33.0°C)Latest: 2025 (31.0°C)10-year averageLong-run average (28.6°C)
Look Up a Day in December
See the weather in Perth on any December date, year by year.
Source: NOAA GHCN-Daily, Perth Metro (1993–2026); Perth Regional Office (1971–1992). Averages cover 1971–2026. How we compute this