Garden Island Long-term Averages

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Mean Max (°C)	27.6	28.4	27.1	24.0	21.5	19.0	17.9	18.2	19.0	21.0	23.9	25.9	22.8
Mean Min (°C)	19.1	19.4	18.3	16.0	13.9	12.1	11.4	11.3	12.0	13.7	15.7	17.5	15.0
Mean Rain (mm)	11.9	14.5	16.4	36.8	74.6	116.6	127.3	95.6	60.5	29.0	19.9	8.8	612.3
Median Rain (mm)	0.9	2.1	7.9	34.7	57.7	110.7	109.2	92.5	47.3	28.4	19.2	4.8	538.6
Mean Rain Days	2.4	2.1	4.5	8.3	11.3	15.7	19.8	17.4	14.6	9.5	6.1	3.4	114.4

Garden Island Daily Records

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Max (°C)	42.0	43.0	41.8	37.1	31.0	24.6	23.0	25.9	33.2	36.3	39.7	43.4	43.4
Low Max (°C)	19.9	18.3	17.4	16.6	14.7	13.5	13.4	13.1	13.6	15.0	16.0	18.0	13.1
High Min (°C)	26.6	26.4	26.2	23.3	20.4	17.7	17.3	17.2	18.4	22.0	24.0	25.5	26.6
Low Min (°C)	12.7	13.8	10.2	7.5	7.6	5.7	4.3	3.5	5.7	7.0	8.5	11.0	3.5
High Rain (mm)	107.6	109.0	37.0	53.6	99.8	44.8	52.2	42.0	41.2	22.0	46.0	38.6	109.0

Garden Island Monthly Records

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Mn. Max (°C)	30.5	31.8	28.8	27.6	24.1	20.5	18.9	19.6	20.2	23.6	27.9	28.1	24.1
Low Mn. Max (°C)	24.6	26.2	24.5	21.9	19.9	17.0	16.8	16.8	16.7	18.3	21.3	21.5	21.5
High Mn. Min (°C)	20.7	21.5	20.0	18.3	16.3	13.6	12.8	13.5	13.7	15.4	17.6	19.7	15.9
Low Mn. Min (°C)	17.5	17.9	17.1	14.3	12.1	10.2	9.9	9.1	9.8	12.2	14.0	15.5	14.4
High Rain (mm)	108.2	126.8	56.2	134.8	184.4	263.6	239.6	143.8	151.6	83.8	87.0	52.0	848.6
Low Rain (mm)	0.0	0.0	0.0	0.0	21.2	20.4	40.6	19.4	21.4	4.6	1.4	0.0	407.6

Garden Island Annual Temperatures & Rainfall

Garden Island Average Number of Days With Temperatures

	Jan	Feb	Mar	Apr	May	Sep	Oct	Nov	Dec	Ann
≥ 40°C	0.3	0.2	0.1	0.0	0.0	0.0	0.0	0.0	0.2	0.8
≥ 35°C	2.9	3.2	1.6	0.1	0.0	0.0	0.1	0.9	1.9	10.8
≥ 30°C	8.8	9.7	7.9	2.3	0.1	0.1	1.0	3.3	6.1	39.6
≤ 2°C	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
≤ 0°C	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Garden Island 'per Week' Values (14th/86th Percentiles)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Max	31.1	34.6	32.5	27.0	24.4	21.1	19.5	20.0	20.7	24.3	27.2	31.0	27.9
Low Max	22.6	23.0	22.4	20.2	18.3	16.9	15.9	15.7	16.6	17.7	19.7	20.9	17.6
High Min	21.0	21.9	21.0	18.3	17.0	14.7	13.7	13.9	14.5	16.0	18.0	19.6	19.0
Low Min	15.9	16.0	15.0	13.2	11.2	9.3	8.2	8.2	9.0	10.5	12.8	14.0	10.4

Garden Island Data Availability

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Years of Minima	24	24	23	23	23	23	23	23	23	22	23	24	23.0
Earliest Entry	2002	2002	2002	2002	2002	2002	2002	2002	2002	2002	2001	2001	2001
Latest Entry	2025	2025	2025	2024	2024	2024	2024	2024	2024	2024	2024	2024	2025
Years of Maxima	24	24	23	23	23	23	23	23	23	22	23	24	23.0
Earliest Entry	2002	2002	2002	2002	2002	2002	2002	2002	2002	2002	2001	2001	2001
Latest Entry	2025	2025	2025	2024	2024	2024	2024	2024	2024	2024	2024	2024	2025
Years of Rainfall	24	24	23	23	22	22	22	22	22	22	23	24	22.0
Earliest Entry	2002	2002	2002	2002	2002	2002	2002	2002	2002	2002	2001	2001	2001
Latest Entry	2025	2025	2025	2024	2024	2024	2024	2024	2024	2024	2024	2024	2025

Station Details

GARDEN ISLAND HSF
Lower West, Western Australia

32.2433°S 115.6839°E 6m AMSL
Commenced 2001

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Months of rain in a day in southern WA

12:31 AEST Heavy rain has fallen in southern parts of Western Australia, with the heaviest day of rain (in any month) in at least 20 years at some locations.