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

Mass evacuations for NT coastal communities as Cyclone Trevor approaches

17:02 EDT

Mass evacuations have been triggered for communities from Groote Eylandt down the Gulf of Carpentaria, as Tropical Cyclone Trevor looks to turn into a category four system.

Tropical Cyclone Trevor continues across Far North Queensland as category one system

15:59 EDT

Communities on the Gulf of Carpentaria are being warned destructive winds and heavy rain from cyclone Trevor are not over, with the system expected to move offshore and rapidly intensify again.

El Nino could be on the horizon

15:35 EDT

The likelihood of an El Nino forming during the coming months has increased this week, according to the latest outlook issued Bureau of Meteorology.