Well I agree with that last statement.

An anticyclone isn't a storm. In an anticyclone the air is descending, which increases its pressure which warms it. Typically, a temperature inversion forms which prevents air rising. An anticyclone that is completely self-contained, with no influence from advected air, will tend to warm up in summer as insolation and the warming effect of the descending air outdoes heat loss from the ground by radiation (the sun is higher, therefore stronger, and shines for more hours). The opposite happens in winter, so large anticyclones, especially the ones over landmasses, can get very cold, such as the one that forms over Siberia in winter.

Happy equinox, world.