Climate Change Chart of Hangzhou, China

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.44 °C in the more recent period; this is an unweighted comparison of the month-by-month means, not a day-weighted annual average or a continuous trend. The largest monthly increase was in February, at +1.06 °C, while June had the largest decrease, a difference of -0.54 °C. These are changes in monthly mean temperatures, not daytime maximum temperatures.

Changes in rainfall

Mean daily rainfall, averaged across calendar months, had a difference of +0.73 mm/day in the more recent period. This unweighted mean describes the aggregate of the monthly means, rather than a day-weighted annual average or monthly rainfall totals. The largest monthly increase occurred in June, with a difference of +2.07 mm/day; in May, the largest decrease was -0.58 mm/day. These month-specific differences do not imply that rainfall changed in the same direction in every month.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.78 hours/day between the reference periods, an unweighted comparison of monthly means rather than a day-weighted annual average. The clearest monthly contrast is between February, where the largest decrease was -1.32 hours/day, and April, where the largest increase was +0.17 hours/day. Those extremes describe particular months; they do not establish a uniform change across the calendar year.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of +0.22 mm/day in the more recent period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a monthly total. The largest monthly increase was in December, with a difference of +1.13 mm/day. This identifies the strongest monthly increase in the supplied comparison, not a pattern shared by every month.