Climate Change Chart of Incheon, South Korea

Overview of climate changes

Temperature changes

Monthly mean temperature was higher on average across calendar months in the more recent period, with a difference of +0.89 °C. This is an unweighted mean of monthly means, not a day-weighted annual average, and it describes the overall monthly pattern rather than every month. The largest monthly increase was in January, at +2.16 °C; this identifies the strongest increase among the reported monthly differences, not a change in daytime maximum temperatures.

Changes in rainfall

Mean daily rainfall averaged across calendar months showed a difference of +0.32 mm/day in the more recent period. This unweighted mean describes the aggregate of monthly means, not monthly totals or a uniform change in every month. The largest monthly increase was in August, at +2.72 mm/day, while the largest decrease was in June, at -1.59 mm/day. Together, these monthly differences illustrate how the overall increase coexists with changes in opposite directions at particular points in the calendar.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.15 hours/day compared with the earlier reference period. This is an unweighted mean of monthly means, so it summarizes the calendar-month pattern rather than day-weighted annual sunshine or every month's conditions. The largest monthly increase occurred in July, at +1.03 hours/day, whereas the largest decrease was in August, at -0.88 hours/day. These contrasting monthly differences show why the aggregate decrease should not be read as a decrease in every month.

Changes in snowfall

The unweighted mean of mean daily snowfall across calendar months was unchanged at the displayed precision, with a difference of 0.00 mm/day. That rounded aggregate does not establish that snowfall was absent or that monthly values were identical. The largest reported monthly increase was tied between February / November, at +0.25 mm/day, while the largest decrease was in January, at -0.78 mm/day. These are differences in mean daily amounts, not monthly snowfall totals.