Autumn in September, high curative value is slightly cool. what's the meaning

In the autumn of September, the dew is cool, that is to say, in the autumn of September, when the dew comes, the weather will gradually get cold. Autumn in September refers to autumn, and September usually enters autumn. In autumn, the most obvious changes in the natural landscape are on trees, red maple leaves and golden rice fields. The dew in the dew is cool, which refers to the white dew in the twenty-four solar terms, followed by the arrival of the beginning of autumn white dew. At this time, the weather temperature has changed, and it has gradually become colder and colder from the crisp autumn. So the whole sentence means that in September, when the Millennium comes, the weather will gradually get cold.