What Is An Indian Summer !!top!! Jun 2026
It must take place after the autumnal equinox (September 22 or 23) and after the first hard frost of the season.
It is caused by a stagnant high-pressure system (anticyclone) that traps warm subtropical air and prevents the usual progression of autumn cooling. Origins and Etymology what is an indian summer
So, when the haze rolls in and the thermometer hits 70 degrees in November, enjoy the flattery of the climate—but remember that winter is waiting just behind the high-pressure ridge. It must take place after the autumnal equinox