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Portland Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
 21.8 21.9 20.7 18.4 16.1 14.1 13.6 14.4 15.8 17.3 18.8 20.5 17.8
Mean Min (°C)
 12.7 13.1 12.0 10.3 8.7 7.5 6.5 6.9 7.8 8.9 10.3 11.6 9.7
Mean Rain (mm)
 34.4 31.8 43.5 64.3 84.5 99.6 106.9 107.5 83.3 68.4 52.4 45.1 820.8
Median Rain (mm)
 81.6 67.4 827.6 - - - - - - - - - -
Mean Rain Days
 8.2 7.5 10.9 14.4 17.9 19.3 20.9 21.0 18.0 15.5 12.3 10.7 175.8

Portland Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
 42.8 40.6 40.9 33.9 27.8 20.8 21.1 24.4 28.3 36.0 38.9 41.7 42.8
Low Max (°C)
 - - - - - - - - - - - - -
High Min (°C)
 - - - - - - - - - - - - -
Low Min (°C)
 4.4 3.3 2.0 1.1 -0.6 -2.2 -2.8 -1.7 -0.3 0.6 2.2 3.3 -2.8
High Rain (mm)
 133.0 78.7 104.1 68.1 72.0 64.0 66.8 79.0 49.6 65.0 75.0 60.0 133.0

Portland Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
 25.6 26.3 24.9 21.2 18.5 16.6 15.2 16.4 18.1 19.8 21.9 24.2 26.3
Low Mn. Max (°C)
 19.1 18.3 17.7 15.5 12.8 11.9 11.9 12.4 12.1 13.3 16.4 17.8 11.9
High Mn. Min (°C)
 16.1 16.1 15.4 12.3 10.8 9.9 9.3 9.4 11.3 12.8 13.6 13.6 16.1
Low Mn. Min (°C)
 10.0 9.8 8.6 7.5 5.1 2.8 3.3 1.7 2.2 5.6 7.9 9.7 1.7
High Rain (mm)
 145.0 135.5 340.8 174.3 212.4 211.2 236.2 227.2 171.6 165.5 136.9 145.2 1289.9
Low Rain (mm)
 0.0 0.0 0.0 0.0 18.2 20.8 23.6 9.1 31.6 0.0 0.0 0.0 453.0

Portland Annual Temperatures & Rainfall

Portland annual climate

Portland Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40°C
 - - - - - - - - - - - - -
≥ 35°C
 - - - - - - - - - - - - -
≥ 30°C
 - - - - - - - - - - - - -
≤ 2°C
 - - - - - - - - - - - - -
≤ 0°C
 - - - - - - - - - - - - -

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

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
 - - - - - - - - - - - - -
Low Max
 - - - - - - - - - - - - -
High Min
 - - - - - - - - - - - - -
Low Min
 - - - - - - - - - - - - -

Portland Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
 78 81 81 80 79 78 79 81 80 81 81 80 79.9
Earliest Entry
 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863
Latest Entry
 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956
Years of Maxima
 78 81 81 80 80 78 80 81 80 81 81 80 80.1
Earliest Entry
 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863 1863
Latest Entry
 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956
Years of Rainfall
 139 139 137 132 130 130 128 130 133 134 136 137 131.0
Earliest Entry
 1872 1872 1872 1872 1872 1872 1872 1872 1872 1872 1872 1872 1872
Latest Entry
 2025 2025 2025 2024 2024 2024 2024 2024 2024 2024 2024 2024 2025

Station Details

PORTLAND
South West, Victoria
38.3846°S 141.6074°E 55m AMSL
Commenced 1857

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