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Weather extremes

How extreme does Perth's weather get?

The hottest, coldest, wettest and snowiest days Perth has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Strathallen Airfield station 21 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Perth has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
87°F Jun 28, 2018

That is about 23°F hotter than a normal June afternoon in Perth (typical high near 64°F).

The three most extreme on record

1 87°F Jun 28, 2018
2 87°F Jul 19, 2022
3 85°F Aug 13, 2025
❄️ Coldest night
-2°F Dec 3, 2010

About 34°F colder than a normal December night in Perth (typical low near 32°F).

The three most extreme on record

1 -2°F Dec 3, 2010
2 1°F Dec 2, 2010
3 1°F Dec 30, 1995
🌧️ Most rain in one day
4.72 in Mar 2, 2018

More rain in a single day than Perth usually gets in the whole month of March (typical March total about 3.0 in).

The three most extreme on record

1 4.72 in Mar 2, 2018
2 3.54 in Jan 14, 2021
3 3.54 in Feb 14, 2021

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-30°-10°10°30°50°70°90°110° all-time high 87°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Perth's record heat sits well above even a hot day for the season — June's 87°F is about 23°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Perth's warmest days reach the high 60s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 87°F and as low as −2°F. A single day has delivered over 5 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Strathallen Airfield, a weather station, about 21 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →