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Perth September Weather

Averages and records for weather in Perth, Western Australia in the month of September.

Typical Perth September Weather 1991–2020
Average daily high	20.5 °C
Average daily low	9.1 °C
Average monthly precipitation	7.9 cm
Daily chance of precipitation	44.8%

Perth September Weather Records 1877–2024
Highest temperature	34.9 °C	September 27, 2023
Lowest temperature	-0.2 °C	September 1, 1956
Highest daily low	19.5 °C	September 8, 1916
Lowest daily high	11.4 °C	September 17, 1917
Hottest average high temperature	23.1 °C	2019
Coldest average high temperature	16.8 °C	1915
Most daily precipitation	6.0 cm	September 14, 1984
Most monthly precipitation	19.9 cm	1923

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
September 1	19.8	8.5	27.1	-0.2
September 2	19.9	8.6	28.4	1.7
September 3	19.9	8.7	27.9	1.4
September 4	20.0	8.7	26.4	1.3
September 5	20.0	8.7	26.7	2.6
September 6	20.1	8.8	28.4	0.5
September 7	20.1	8.8	30.3	1.7
September 8	20.1	8.8	27.8	2.9
September 9	20.2	8.9	32.6	0.4
September 10	20.2	8.9	29.2	1.5
September 11	20.3	8.9	28.1	1.5
September 12	20.3	8.9	30.6	3.3
September 13	20.4	9.0	27.6	2.7
September 14	20.4	9.1	29.4	2.2
September 15	20.5	9.1	29.1	2.1
September 16	20.6	9.1	28.8	1.0
September 17	20.7	9.2	29.3	2.7
September 18	20.8	9.2	30.7	1.4
September 19	20.9	9.2	28.0	3.8
September 20	20.9	9.3	34.5	2.0
September 21	21.0	9.3	30.1	1.6
September 22	21.1	9.3	31.4	0.4
September 23	21.1	9.3	30.0	2.3
September 24	21.2	9.4	31.3	4.2
September 25	21.3	9.4	30.4	2.5
September 26	21.4	9.4	31.6	2.8
September 27	21.5	9.5	34.9	3.0
September 28	21.6	9.5	31.4	1.9
September 29	21.7	9.6	30.9	2.6
September 30	21.8	9.6	32.7	3.6

Weather Station Details

Years	Station	Coordinates
1945–2024	Perth Airport	location
1877–1944	Perth Regional Office	location