Perth Weather in January
In January, Perth averages a high of 31°C (88°F) and a low of 18°C (65°F), from 55 years of daily records (1971–2026).
31°C
Average high
88°F
18°C
Average low
65°F
46°C
Record high
114°F · January 31, 1991
9°C
Record low
48°F · January 25, 2001
What January Is Like in Perth
- A typical January brings 7.4 days above 35°C (95°F).
- The January heat record, 46°C (114°F) on January 31, 1991, has stood for 35 years.
- January in Perth has become 0.6°C (1.1°F) warmer on average: the 2012–2026 average against 1970–1989.
- The warmest January in the record was 1978; the coldest was 1982.
At least 1 mm of rain falls on 5% of January days, and the month averages 14 mm in total.
Warmest: 2022 (33.7°C)Latest: 2026 (31.2°C)10-year averageLong-run average (30.9°C)
Look Up a Day in January
See the weather in Perth on any January 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