The vernal equinox is not warm and the autumn equinox is not cold.

If the weather is not warm at the vernal equinox and solar terms, it will not become cool until the autumnal equinox and solar terms.

Judging from the time this year, the vernal equinox is March 20th. Except for Northeast China, Inner Mongolia, Tibet and other regions, the temperature in most other regions has risen above 10 degrees, and the temperature in many areas in the south is even higher, reaching above 20 degrees. In normal years, the weather is already warm at the vernal equinox. The autumnal equinox is on September 23rd. According to the normal year, the temperature has started to drop at the end of September, so you can put on long-sleeved clothes to prepare for the arrival of autumn. According to the saying that the vernal equinox is not warm and the autumn equinox is not cold, if the vernal equinox is not hot, the autumn equinox is not cold, which is an abnormal weather condition.