Climate Change Chart of Goyang, South Korea

Overview of climate changes

Temperature changes

The unweighted mean difference across calendar-month temperature means was a difference of +1.09 °C. This is an aggregate comparison of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in January, with a difference of +2.92 °C; by contrast, August had the largest monthly decrease, a difference of -0.09 °C. These monthly extremes show that the average difference was not the same in every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.31 mm/day. This unweighted average of monthly means is not a day-weighted annual average, and the figures describe daily mean amounts rather than monthly rainfall totals. The largest monthly increase occurred in August, at a difference of +2.02 mm/day, while June recorded the largest monthly decrease, at a difference of -1.62 mm/day. The contrast between these monthly changes is a reminder that the overall mean does not describe the difference in each individual month.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.24 hours/day. This is an unweighted comparison of monthly means, not a day-weighted annual figure. Monthly differences varied: July had the largest increase, with a difference of +0.69 hours/day, whereas August had the largest decrease, with a difference of -1.05 hours/day. These daily-hour averages compare the reference periods and do not imply the same change in every month.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.03 mm/day. This small aggregate difference is based on unweighted monthly means, not a day-weighted annual average, and describes daily mean amounts rather than monthly totals. The monthly changes were not uniform: the largest decrease occurred in January, at a difference of -0.59 mm/day, while November had the largest increase, at a difference of +0.22 mm/day. The overall mean therefore should not be read as describing every month's snowfall difference.