Climate Change Chart of Chuncheon, South Korea

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.02 °C compared with the earlier reference period. This is an unweighted average of the monthly means, not a day-weighted annual figure, and the metric describes mean temperatures rather than daytime highs. The largest monthly increase was in January, with a difference of +2.97 °C. This identifies the strongest increase among the monthly mean temperature differences; it does not mean that every month warmed by the same amount.

Changes in rainfall

Mean daily rainfall averaged across calendar months had a difference of +0.13 mm/day in the more recent period. This unweighted mean summarizes the monthly differences; it is not a day-weighted annual average or a measure of monthly rainfall totals. The largest monthly increase in mean daily rainfall occurred in August, with a difference of +2.73 mm/day. By contrast, June had the largest monthly decrease, a difference of -2.34 mm/day. These are changes in daily means, not monthly totals, and the contrasting monthly results show why the overall mean does not describe each month's difference.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.12 hours/day compared with the earlier reference period. This is an unweighted summary of monthly means rather than a day-weighted annual figure. The largest increase in monthly mean daily sunshine was in July, with a difference of +0.84 hours/day; the largest decrease was in August, with a difference of -0.82 hours/day. These month-specific differences indicate variation in the comparison across the calendar, not a uniform change throughout the year.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of -0.05 mm/day in the more recent period. This unweighted mean summarizes monthly daily amounts, not monthly snowfall totals; a rounded difference also should not be read as evidence that snowfall was absent. The largest monthly decrease in mean daily snowfall was in January, with a difference of -0.52 mm/day. In April, the largest monthly increase was a difference of +0.19 mm/day. These daily-mean differences describe contrasting month-specific comparisons, not the amount of snowfall in an entire month.