| Season | Meteorological Months | Astronomical Start Date (Approx.) | | :--- | :--- | :--- | | | March, April, May | March 20 (Equinox) | | Summer | June, July, August | June 21 (Solstice) | | Autumn | September, October, November | September 22 (Equinox) | | Winter | December, January, February | December 21 (Solstice) |

Comparing monthly statistics requires fixed dates.

Before listing the months, it is important to understand the two primary methods used to define them:

However, the specific months assigned to each season depend heavily on whether one follows the definition or the astronomical definition.