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Mt Gambier Area

Climate of Mt Gambier

Mt Gambier has a temperate climate with warm dry summers and cool to cold and wet winters. The average rainfall is 709mm on an average 183 days. It rains in Mt Gambier on more days per year than in any other place in South Australia. July is the wettest month with an average of 99.4mm falling on 21 days whilst February normally records the lowest rainfall with an average of 25 mm on an average 8 days. The highest ever monthly rainfall was 189.5mm in July 1964 and the highest ever daily rainfall was 90.7mm on 18th February 1946.

Being so close to the Southern Ocean, the weather in Mt Gambier is strongly influenced in the winter months by the low pressure systems, and accompanying cold fronts, that sweep across the Great Australian Bight. During the warmer months the high pressure systems over the continent are the predominating weather feature. As expected January and February are our warmest months with average maximum temperatures of 25.1C. These months can also have periods of hot weather with January, on average, having seven days with temperatures over 30°C and three days with temperatures over 35°C. By contrast, our winters are cool to cold with average temperatures in July of 5.1°C for the minimum and only 13.1°C for the maximum. The district is also prone to frosts, particularly in June and July, when we can expect, on average, to have 5 frosts per month. Early morning fogs are also common during the winter months.

The highest ever temperature recorded in Mt Gambier was 43.6°C on 16th February 1983 (Ash Wednesday) and the lowest ever temperature recorded was -3.9°C on 20th June 1950 and 2nd July 1960. The lowest ever terrestrial (ground) temperature was -8.0°C on 24th July 1985.

Despite the number of rain days each year (183), Mt Gambier records an average of 6.3 hours of sunshine each day. January has the highest average, with 8.9 hours of sunshine per day and June records the lowest average, with only 4.0 hours of sunshine per day. The average annual evaporation is 1350mm with, on average, 6.9mm of evaporation each day in January and 1.2mm of evaporation each day in June.

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