Korean History Project
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Korea's Climate


The weakening southerly winds of late summer are followed by a drop in the average relative humidity to around 70% in September and October. A short period of rainfall comes in early September as the weakening monsoon fronts retreat back from the north. By late September, low pressure weather systems begin forming over Siberia, bringing dry, cool continental air into northern Korea. The steadily clearing autumn weather makes for pleasant days and cool evenings, one of the best seasons of the year. The Korean call this weather condition "High Sky."  By October, while the days remain sunny and dry, the first cold spells are felt at night in the northern regions. During the transition months of September and October, the land-sea breezes become prominent as the Siberian High begins to exert its affect on Korea. The only dark clouds in the September sky are those marking the approach of Pacific typhoons.


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