When did Zhengzhou cool down recently?

The first first frost solar term is coming to beginning of winter. It's time to wear a sweater, but the temperature is still high, which is caused by drought. The countryside has begun to fight drought, just waiting for a rain. As long as it rains, the temperature will plummet, but the weather forecast is that it won't rain for a week. Only God knows when it will cool down. Let's wait, but pay attention to the weather changes and pay attention to cold protection.