Climate in Perth, Australia

Perth, Australia has a mediterranean climate. The annual average temperature is about 20.7°C, with around 2792 hours of sunshine; the national rainfall baseline is roughly 549 mm across 61 rainy days a year. The warmest month is Jan (highs near 30.7°C) and the coldest is Jul (lows near 10.6°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Perth is classified as Mediterranean. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for Australia — so cities in the same country usually share a zone.

The rainfall baseline for Australia is about 549 mm a year over roughly 61 rainy days, with the wettest month Jun and the driest Jan. This figure is not specific to Perth: every city in Australia carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Perth sees an estimated 2792 hours of sunshine a year, concentrated in the warmer months around Jan.

By temperature and rainfall, the most comfortable months in Perth are Jan, Sep, Feb. Conditions vary year to year — verify with a current forecast before booking.

Perth has a climate comfort score of 94/100, a very comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Sydney — Oceanic, comfort 82/100
• Climate in Melbourne — Oceanic, comfort 82/100
• Climate in Brisbane — Semi-Arid, comfort 76/100