Climate Change Chart of São Paulo, Brazil

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.72 °C in the more recent period; this unweighted comparison describes the set of monthly means, not a day-weighted annual average or daytime highs. The largest monthly increase was in December, with a difference of +1.30 °C. By contrast, August had the largest monthly decrease, a difference of -0.03 °C; these extrema identify particular months and do not imply that every month changed in the same direction.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of -1.06 mm/day in the more recent period. This is an unweighted average of monthly means, not an annual rainfall total or a day-weighted average, and it does not describe every month individually. The largest monthly decrease occurred in December, with a difference of -3.75 mm/day in mean daily rainfall. In September, the largest monthly increase was a difference of +0.13 mm/day. These contrasting monthly changes show why the across-month mean should not be read as a uniform shift throughout the calendar.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of +0.21 hours/day in the more recent period. This unweighted comparison summarizes monthly means; it is not a day-weighted annual figure and does not establish the change in every month. The largest increase was in December, where mean daily sunshine had a difference of +1.18 hours/day. The largest decrease was in August, at a difference of -0.45 hours/day. Together, these monthly extrema show that changes varied by month, rather than moving uniformly across the calendar.