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Williamstown Climate

Williamstown Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
27.1 27.5 24.3 20.6 16.1 13.0 12.2 13.1 15.4 18.9 21.9 24.9 19.9
Mean Min (°C)
11.1 11.2 9.7 7.0 5.0 3.6 3.2 3.4 4.4 6.0 7.7 9.5 7.0
Mean Rain (mm)
27.0 22.2 29.0 47.0 70.4 90.8 112.2 91.4 79.8 58.1 38.0 38.3 691.9
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 4.6 6.6 9.4 12.9 14.8 16.9 17.8 14.2 11.1 8.4 7.9 121.7

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 40.1 58.7 53.3 53.0 71.4 35.6 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)
77.2 133.2 102.3 159.7 195.8 221.3 261.5 207.2 205.5 178.7 102.2 166.2 1231.7
Low Rain (mm)
0.6 0.0 0.0 3.0 17.0 15.2 10.4 19.5 22.4 4.2 0.3 2.8 315.0

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
3.8 3.4 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.7 10.2
≥ 30.0°C
9.8 10.4 5.5 1.1 0.0 0.0 0.0 0.0 0.0 0.5 3.0 7.1 37.0
≤ 2.0°C
0.1 0.1 1.0 3.7 7.4 9.7 10.8 9.6 7.9 5.0 2.0 0.8 56.1
≤ 0.0°C
0.0 0.0 0.1 1.0 3.5 5.5 6.6 5.5 4.1 1.6 0.6 0.0 27.6

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
29 29 29 27 24 24 24 24 24 23 26 28 25.7
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
29 29 29 27 24 24 25 24 24 24 26 28 25.8
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 32 31 30 30 30 30 30 32 32 31.2
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
Display Your Local Weather

Weather News

Huge storm wreaks havoc in Kalgoorlie

11:25 EDT

More than 16,000 homes and businesses remain without power in Kalgoorlie after the Goldfields region was battered by severe thunderstorms and winds of more than 100 kilometres an hour overnight.

Fierce Storms lash Western Australia

09:31 EDT

Wind gusts in excess of 110km/h were recorded yesterday afternoon as storms rolled over WA's southeast.

Cooler conditions for Perth before heat set to return

13:46 EDT

Perth is set for a run of cooler conditions over the next few days, following on from a two week period of mostly well above average temperatures.