Cold temperatures for 11 and 12 June 2009Some of the coldest temperatures so far this year occurred on Thursday 11 and Friday 12 June. A few localities across New South Wales from various weather stations via Weatherzone showing the minimum and maximum temperatures have been selected as shown.
Locality                             Minimum temperature   Maximum temperature
Albury
Thursday                            Minus 2C                   9.6C 
Friday                                Minus 1.3C                 8 C (3 pm reading)
Armidale
Thursday                            Minus 5.3C                 9.1C
Friday                                Minus 7.0C                 14C (3 pm reading) (That is a 21C difference)
Bathurst
Thursday                            Minus 4.2C                 7.8C
Friday                                Plus 0.3C                   13 C (3 pm reading)
Cabramurra
Thursday                            Minus 7C                   2.1C                     
Friday                                Minus 3.8C                 3C (3 pm reading)
Charlottes Pass
Thursday                            Minus 7.6C                4C 
Friday                                Minus 11C                 4C (3 pm reading) (The difference is 15C)
Dubbo
Thursday                            Minus 0.9C                10.8C
Friday                                Minus 2.4C                14C (3 pm reading)
Glenn Innes
Thursday                            Minus 4C                   10C   
Friday                                Minus 3.2C                15 (3 pm reading) (That is a difference of 18.2C)
Goulburn
Thursday                            Minus 2C                   7.2C 
Friday                                Minus 2C                   9C (3 pm reading)
Oberon
Thursday                            Minus 3.3C                 4.5C  
Friday                                Minus 2.3C                 8C (3 pm reading)
Orange
Thursday                            Minus 3.2C                 6.2C         
Friday                                Minus 3.5C                 10C (3 pm reading)
Tamworth                         
Thursday                            Minus 3.2C                 11.8C
Friday                                Minus 4.4C                 16C (3 pm reading)
The difference between the minimum temperature and maximum temperature in Tamworth for Friday is 20.4C.
The Daily mean Minimum temperature plot for Thursday 11/6/2009 is produced from "Water and the Land" - (Agriculture and Natural Resource Management) (Bureau of Meteorology) at 
http://www.bom.gov/watl/index.shtml then heading "Temperature". Various plots can be produced here for temperatures. The plot shows inland New South Wales and Victoria away from the coastal fringe experiencing cold or very cold conditions on Thursday morning.
The cold conditions extended into Southern Queensland as well. The coldest regions for Thursday morning were:-
North East Victoria and parts of Southern New South Wales where minimum temperatures fell to between minus 3C and minus 6C.
A small area in the Snowy Mountains had minimum temperatures less than Minus 6C.
Northern Tablelands of New South Wales where minimum temperatures fell to between minus 3C and minus 6C.
Much of inland New South Wales experiencing minimum temperatures of between 0C and minus 3C.
Large areas of inland Victoria experienced minimum temperatures of between 0C and minus 3C.
Concentrating on South East Australia, only the coastal fringe of New South Wales and Victoria escaped the minus temperatures.
It is also noted that parts of Eastern South Australia and Tasmania also experienced a cold Thursday morning in which minimum temperatures dropped to below 0C.
Harley Pearman