Climate Change Chart of Melbourne, Australia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.03 °C compared with the earlier reference period; this is an unweighted mean of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +1.78 °C. That identifies the strongest increase among the supplied monthly differences, rather than describing every month.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of +0.57 mm/day compared with the earlier reference period. This is an unweighted mean of monthly means, not a day-weighted annual average, and it describes average daily amounts rather than monthly totals. The largest monthly increase occurred in November, where the difference was +1.15 mm/day; that monthly result does not imply the same change in every month.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.50 hours/day compared with the earlier reference period. This unweighted mean of monthly means summarizes the calendar months rather than representing a day-weighted annual average. The largest monthly decrease was in December, with a difference of -0.99 hours/day; this marks the most pronounced decrease among the supplied monthly differences, not a pattern shared by every month.

Changes in snowfall

The mean daily snowfall difference, averaged across calendar months, is 0.00 mm/day at the displayed precision. This unchanged rounded value does not establish that snowfall was absent or that there was no difference at greater precision; it describes the aggregate of monthly means, not monthly totals or each individual month.