What does the thunder in the autumn equinox mean at night?

1, the thunder in the autumn equinox night indicates that it may bring rain.

2. The autumnal equinox is the16th solar term in the twenty-four solar terms of the lunar calendar, which is around September 23rd of the Gregorian calendar every year. The autumnal equinox is just in the middle of 90 days in autumn, which means "equal share", so it is called "autumnal equinox". On this day, the sun shines directly on the equator of the earth, distributing light and heat equally to the northern and southern hemispheres. The ancient book Spring and Autumn Stories said: "The autumn equinox is half cloudy and half sunny, so it is cold and hot day and night."