Williamstown Climate

Williamstown Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
27.2 27.5 24.3 20.8 16.1 13.1 12.1 12.6 15.0 18.8 22.0 24.9 19.9
Mean Min (°C)
11.1 11.2 9.7 7.0 4.9 3.8 3.4 3.5 4.2 6.2 7.7 9.5 7.0
Mean Rain (mm)
27.0 22.8 29.1 50.5 80.2 94.0 119.8 100.4 85.1 65.5 38.8 38.1 749.3
Median Rain (mm)
20.4 11.8 15.8 41.2 61.6 78.4 95.3 83.7 58.0 42.1 33.6 29.0 638.5
Mean Rain Days
6.0 4.7 6.9 9.8 13.7 15.7 18.3 18.6 14.8 11.8 8.6 8.2 137.2

Williamstown Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
42.5 42.5 40.6 35.0 26.5 22.0 23.5 25.0 29.3 33.0 39.0 40.0 42.5
Low Max (°C)
14.4 15.6 13.2 9.6 8.0 6.0 5.8 7.0 8.0 7.1 10.4 11.7 5.8
High Min (°C)
26.5 28.5 26.0 22.5 18.9 13.9 16.0 12.0 19.0 21.0 23.0 23.0 28.5
Low Min (°C)
2.0 1.0 -2.2 -3.5 -5.0 -7.0 -7.0 -4.7 -4.0 -3.5 -2.0 0.1 -7.0
High Rain (mm)
40.1 102.9 65.2 44.6 58.7 53.3 63.8 71.4 54.6 64.5 40.1 49.0 102.9

Williamstown Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
31.2 30.6 27.6 23.6 17.9 15.4 14.5 15.5 17.2 21.4 25.7 28.1 21.3
Low Mn. Max (°C)
24.2 24.5 20.8 17.7 13.8 10.9 10.5 10.8 12.8 16.1 18.4 22.3 18.3
High Mn. Min (°C)
15.1 13.6 13.0 9.2 8.0 7.9 5.0 5.4 5.6 7.5 9.9 11.6 8.4
Low Mn. Min (°C)
8.5 9.3 7.0 5.5 3.1 0.6 1.8 1.3 2.6 4.2 6.3 7.6 5.8
High Rain (mm)
77.2 133.2 102.3 159.7 213.9 248.4 261.5 207.2 205.5 178.7 102.2 166.2 1231.7
Low Rain (mm)
0.6 0.0 0.0 3.0 17.0 21.2 44.4 23.5 22.4 4.2 0.3 2.8 405.4

Williamstown Annual Temperatures & Rainfall

MOUNT CRAWFORD FOREST HEADQUARTERS

Mean daily minimum temp
Mean daily maximum temp
Highest/lowest on record
Highest/lowest on record
Mean monthly rainfall

Williamstown Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40.0°C
0.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.0
≥ 35.0°C
4.0 3.4 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.7 10.3
≥ 30.0°C
10.0 10.4 5.5 1.2 0.0 0.0 0.0 0.0 0.0 0.5 3.1 7.1 37.4
≤ 2.0°C
0.1 0.1 1.0 3.8 8.2 10.4 11.4 10.1 9.2 4.9 2.2 0.8 58.0
≤ 0.0°C
0.0 0.0 0.1 1.0 3.6 5.8 6.8 5.9 5.1 1.2 0.6 0.0 28.5

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

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
34.3 34.4 30.5 26.6 20.0 15.6 15.0 16.7 20.0 25.0 28.6 32.1 28.6
Low Max
20.6 21.0 18.5 15.5 12.7 10.5 10.0 10.0 11.2 13.5 15.8 18.3 12.1
High Min
15.6 15.5 14.0 11.5 9.5 8.0 7.1 7.0 8.5 10.0 12.0 13.4 12.0
Low Min
7.0 7.2 5.0 2.2 0.3 -1.0 -1.0 -0.8 0.0 1.7 3.5 5.5 1.5

Williamstown Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
28 29 29 25 16 16 18 17 16 15 26 28 28.0
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967
Latest Entry
1995 1995 1995 1995 1994 1994 1994 1994 1994 1994 1994 1994 1995
Years of Maxima
28 29 29 26 16 16 19 18 16 17 26 28 28.0
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967
Latest Entry
1995 1995 1995 1995 1994 1994 1994 1994 1994 1994 1994 1994 1995
Years of Rainfall
33 33 33 33 33 33 32 32 32 32 32 32 32.0
Earliest Entry
1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964
Latest Entry
1996 1996 2005 1996 1996 1996 1996 1995 1995 1995 1995 2001 2005

Station Details

MOUNT CRAWFORD FOREST HEADQUARTERS
Mount Lofty Ranges, South Australia
34.7122°S 138.9469°E 395m AMSL
Commenced 1954
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