Climate Change Chart of Busan, South Korea

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.07 °C compared with the earlier reference period. This is an unweighted average of the monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in February, with a difference of +2.36 °C; this identifies the strongest increase among the reported monthly changes, rather than implying that every month warmed by the same amount.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, was higher on average across calendar months: the difference in the unweighted mean of monthly values was +1.22 mm/day compared with the earlier reference period. The largest monthly increase occurred in August, at a difference of +2.74 mm/day. These figures describe period-to-period differences in monthly averages; they do not establish that rainfall increased in every month or on every day.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.52 hours/day in the more recent period. This unweighted comparison of monthly means does not mean that each month had less sunshine. Monthly differences varied: August had the largest decrease, with a difference of -1.15 hours/day, while July recorded the largest increase, at +0.37 hours/day. These are changes in mean daily hours, not totals for an entire month.

Changes in snowfall

For mean daily snowfall, the unweighted average of monthly means had a difference of +0.02 mm/day across calendar months compared with the earlier reference period. The small average difference should be read at the reported precision and does not establish that snowfall was unchanged beyond that precision. Monthly differences went in both directions: the largest increase was in March, at +0.43 mm/day, whereas the largest decrease was in February, with a difference of -0.38 mm/day. These are differences in daily averages, not monthly snowfall totals.