During the period of tsuyu, in particular in the case of long rain, as the hours of sunlight is short, the up and down of air temperature (difference between the highest and lowest air temperature in a day) is small and it is sometimes felt chilly.
梅雨の時期、特に長雨の場合は、日照時間が短いため、気温の上下（最高気温と最低気温の差、日較差）が小さく、肌寒く感じることがある。