The Aurora Borealis is on all year round (it's caused by solar activity and the Sun doesn't much care which month it is on Earth), and the only reason why it's better to see them between September to March is because the Northern latitudes get more darkness during these months. read more
The Aurora is an incredible light show caused by collisions between electrically charged particles released from the sun that enter the earth’s atmosphere and collide with gases such as oxygen and nitrogen. read more