Climate averages 1991–2020

Perth weather
in March.

A hot, fairly dry month: the 4th warmest and the joint 3rd driest of the year. Meets the pleasant-weather rule

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.9°C Daytime mean, March

Average low 17.8°C Night-time mean, March

Rainfall 17 mm 2 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

March is a hot month in Perth: daytime highs average 28.9°C and nights cool to about 17.8°C. By daytime temperature it is the 4th warmest of the 12 months.

Expect about 17 mm of rain on roughly 2 days, which makes March a fairly dry month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average March day.

The nearest other city in this atlas is Mandurah (65 km away). In March its highs average 28.1°C, 0.7°C cooler than Perth, with 18 mm of rain.

Among the 32 cities listed in Australia, Perth ranks 4th of 32 for the warmest March highs and 1st of 32 for the driest March (rainfall, lowest first). The mean March high of those 32 cities is 25.1°C; Perth is 3.8°C warmer than that mean.

From March to April, average highs fall by 4.0°C to 24.8°C, and monthly rainfall rises from 17 mm to 24 mm.

The annual picture

March in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Perth climate table

1991–2020

Monthly climate averages for Perth, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	31.2°C18.8°C	18.8°C	17	1.8	14.014 h
February	31.2°C19.2°C	19.2°C	16	1.5	13.213 h
March, selected	28.9°C17.8°C	17.8°C	17	2.3	12.312 h
April	24.8°C15.3°C	15.3°C	24	4.1	11.311 h
May	20.9°C12.4°C	12.4°C	67	7.8	10.511 h
June	17.9°C10.5°C	10.5°C	98	10.7	10.110 h
July	16.7°C9.5°C	9.5°C	102	12.5	10.310 h
August	17.2°C9.6°C	9.6°C	89	11.0	11.011 h
September	18.5°C10.4°C	10.4°C	55	8.5	11.912 h
October	22.0°C12.2°C	12.2°C	27	4.7	12.913 h
November	25.7°C14.9°C	14.9°C	19	3.7	13.714 h
December	29.0°C17.1°C	17.1°C	9.3	1.6	14.214 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

March in nearby cities

Distance from Perth

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Perth) is explained once on the Perth year overview and on the Sources, method and limits page.