Is it unusual to have thunder and rain in late autumn?

After the autumnal equinox solar term, the position of the direct "point" of the sun moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, while the ground lost more heat and the temperature dropped significantly. In other words, the northern hemisphere where we live is controlled by continental cold air masses, and the subtropical high is weakened. The air in autumn and winter is cold and dry, and the air in autumn is refreshing. Coupled with the weakening of solar radiation, it is not easy to form strong convective cold front weather, so there is less possibility of lightning and thunderstorms.

Especially after entering the autumnal equinox solar term, the local strong warm and humid airflow meets the cold air going south, the cold air sinks, and the warm and humid air at the lower level is forced to rise, resulting in strong convection, which creates favorable conditions for the formation of lightning and forms a thunderstorm cold front or a cold front thunderstorm. In other words, the formation of the common cold front thunderstorm in China is a very common natural climate phenomenon caused by the intersection and collision of cold, warm and humid air currents.