Climate Change Chart of Auckland, New Zealand

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.03 °C in the more recent period. This is a comparison of month-level averages, not a measure of daytime maximum temperatures or evidence that every month warmed by the same amount. The largest monthly increase was in April, with a difference of +1.53 °C. This identifies the strongest increase among the supplied monthly comparisons, rather than describing the pattern in every month.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of -0.02 mm/day in the more recent period. This is an unweighted comparison of calendar-month means, not a day-weighted annual average, and it does not imply the same change in each month. The largest monthly increase in mean daily rainfall occurred in February, with a difference of +0.86 mm/day. In contrast, April had the largest monthly decrease, a difference of -0.66 mm/day. These daily averages should not be read as monthly rainfall totals.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration shows a difference of -0.32 hours/day in the more recent period. The figure summarizes calendar-month averages; it does not mean that sunshine changed by the same amount every day or in every month. The largest monthly decrease was in February, where mean daily sunshine duration had a difference of -0.63 hours/day. By comparison, the largest monthly increase occurred in May, with a difference of +0.08 hours/day; these mark the most pronounced monthly changes in their respective directions.