Portland Airport Long-term Averages

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Mean Max (°C)	22.2	22.5	21.1	18.5	15.9	13.8	13.2	14.0	15.3	17.0	18.7	20.3	17.7
Mean Min (°C)	12.4	12.8	11.8	9.9	8.4	6.9	6.3	6.7	7.5	8.4	10.0	11.0	9.3
Mean Rain (mm)	35.9	28.4	45.8	59.0	84.6	109.5	114.0	106.0	85.8	63.8	54.5	49.4	843.2
Median Rain (mm)	27.0	17.4	35.4	56.2	64.8	104.8	106.9	98.1	82.6	54.6	42.4	41.8	800.0
Mean Rain Days	10.7	9.1	14.0	18.2	21.7	23.0	24.5	23.8	20.5	18.3	14.9	13.6	213.0

Portland Airport Daily Records

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Max (°C)	42.5	43.1	40.5	34.2	26.8	20.6	18.7	24.4	31.0	32.8	35.5	43.6	43.6
Low Max (°C)	13.9	14.5	13.6	10.9	9.6	9.2	8.5	9.0	9.4	10.3	11.3	12.4	8.5
High Min (°C)	25.5	25.2	22.5	21.1	15.3	14.1	12.8	13.8	16.6	17.5	20.3	20.7	25.5
Low Min (°C)	1.6	4.1	2.5	1.2	0.0	-1.5	-2.3	-0.7	-0.6	-0.9	1.5	0.9	-2.3
High Rain (mm)	72.0	50.0	77.2	50.0	59.4	71.2	38.6	61.0	46.0	55.0	68.6	61.0	77.2

Portland Airport Monthly Records

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Mn. Max (°C)	25.0	26.3	24.7	21.2	17.2	14.9	14.1	15.7	17.4	20.6	22.3	24.1	18.6
Low Mn. Max (°C)	19.1	20.1	19.0	16.2	14.5	12.3	11.9	12.4	12.8	14.7	16.3	17.1	16.7
High Mn. Min (°C)	14.9	15.1	14.2	11.5	10.6	8.7	8.1	8.2	9.5	9.8	12.7	13.0	10.0
Low Mn. Min (°C)	10.2	10.5	10.4	8.5	6.9	4.5	4.6	5.7	6.4	6.2	8.6	8.5	8.3
High Rain (mm)	149.6	84.8	175.2	114.4	197.0	202.4	225.4	255.0	161.2	131.6	113.4	125.0	1157.2
Low Rain (mm)	1.4	1.6	4.6	11.0	23.6	49.6	55.6	26.2	37.2	7.0	16.2	12.8	583.6

Portland Airport Annual Temperatures & Rainfall

Portland Airport Average Number of Days With Temperatures

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
≥ 40°C	0.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.4
≥ 35°C	1.4	1.3	0.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.6	3.9
≥ 30°C	3.5	3.3	2.4	0.4	0.0	0.0	0.0	0.0	0.0	0.4	1.3	1.9	13.2
≤ 2°C	0.0	0.0	0.0	0.1	0.6	1.6	1.7	0.9	0.5	0.2	0.1	0.0	5.6
≤ 0°C	0.0	0.0	0.0	0.0	0.0	0.2	0.3	0.1	0.0	0.0	0.0	0.0	0.7

Portland Airport 'per Week' Values (14th/86th Percentiles)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
High Max	27.8	29.4	27.2	22.8	18.2	15.3	14.8	16.4	18.1	21.4	23.8	25.0	22.0
Low Max	17.5	17.9	16.8	14.9	13.6	11.9	11.3	11.7	12.4	13.3	14.6	16.1	12.9
High Min	15.0	15.4	14.5	12.6	11.1	9.6	8.9	9.1	10.0	11.0	12.6	13.8	13.0
Low Min	9.0	9.3	8.5	6.6	5.2	3.9	3.6	4.2	4.7	5.3	7.0	7.6	5.5

Portland Airport Data Availability

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Years of Minima	42	42	42	41	41	42	42	42	42	42	42	42	41.0
Earliest Entry	1983	1983	1983	1983	1983	1982	1982	1982	1982	1982	1982	1982	1982
Latest Entry	2024	2024	2024	2024	2023	2023	2023	2023	2023	2023	2023	2023	2024
Years of Maxima	42	42	42	41	41	42	42	42	42	42	42	42	41.0
Earliest Entry	1983	1983	1983	1983	1983	1982	1982	1982	1982	1982	1982	1982	1982
Latest Entry	2024	2024	2024	2024	2023	2023	2023	2023	2023	2023	2023	2023	2024
Years of Rainfall	42	42	42	41	41	42	42	42	42	42	42	42	41.0
Earliest Entry	1983	1983	1983	1983	1983	1982	1982	1982	1982	1982	1982	1982	1982
Latest Entry	2024	2024	2024	2024	2023	2023	2023	2023	2023	2023	2023	2023	2024

Station Details

CASHMORE AIRPORT
South West, Victoria

38.3148°S 141.4705°E 81m AMSL
Commenced 1982

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