Climate Change Chart of Brisbane, Australia

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.74 °C compared with the earlier reference period. This is an unweighted average of the calendar-month means, not a day-weighted annual average, and it describes monthly means rather than daytime maximum temperatures. The largest monthly increase in mean temperature was in June, with a difference of +1.22 °C. That identifies the strongest increase among the reported monthly differences; it does not imply that every month changed by the same amount.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.35 mm/day. This is an unweighted mean of the monthly means, not an annual total or a day-weighted average, so it summarizes the calendar-month averages rather than rainfall on every individual day. The largest monthly increase in mean daily rainfall occurred in March, with a difference of +1.62 mm/day. In contrast, the largest monthly decrease was in November, at a difference of -1.16 mm/day. These are differences in daily means, not monthly rainfall totals, and show that the monthly comparisons did not all move in the same direction.

Changes in sunshine duration

Across calendar months, mean daily sunshine duration had a difference of -0.14 hours/day. This is the unweighted average of the monthly mean differences, not a day-weighted annual figure, and it does not mean that daily sunshine changed by that amount in every month. The largest monthly decrease in mean daily sunshine was in March, with a difference of -0.66 hours/day. The largest monthly increase was in November, at a difference of +0.37 hours/day; together, these mark the reported monthly extremes rather than a uniform shift across the calendar.