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Long-Term Climate Variability in Australia

Variation in Australian Climate

Long-Term Global Climate Variations

Long-Term Temperature Variations in Australia

Long-Term Rainfall Variations in Australia

Other Climate Variations in Australia


Long-Term Temperature Variations in Australia

Temperature variations over Australia during the past century have been consistent with global trends in showing an increase in the mean temperature (average of daytime maximum and overnight minimum temperatures) over most of the continent. The last two decades have been particularly warm, with many of the warmest years on record having occurred during the 1980s and 1990s.

 

Temperature Moderation
mean temperature

Overnight temperatures tend to have increased more than daytime temperatures resulting in a decrease in the diurnal temperature range (the difference between the maximum and minimum temperatures during the day).

Consistent with the warming trend is an increase in the frequency of warm days and nights, and a decrease in the number of cool days and nights. There has also been a significant decrease in the number of minimum temperatures below 0°C and a trend toward a shorter frost season, particularly in inland eastern Australia.

 

Most of Australia has experienced a warming trend in maximum temperature during recent decades. However, this trend is not uniform throughout the country; the strongest warming trend being in inland Queensland, northeast South Australia and northern Tasmania.

Maps of Australia
Temperature trends over Australia, 1950-1998 (C° per century).
Annual maximum left, and minimum right.