Meteorological Seasons [new] Jun 2026

While astronomical seasons remain culturally and ritually significant—marking the longest and shortest days of the year—they are insufficient for the precise needs of modern science. Meteorological seasons provide a pragmatic, statistically robust framework that aligns with the thermal reality of the planet. By decoupling the seasons from celestial mechanics and anchoring them to the calendar and temperature cycles, meteorologists can provide more accurate forecasts, clearer historical comparisons, and better planning tools for society.

For the , the seasons are shifted by six months: meteorological seasons

In the Northern Hemisphere, these seasons are defined as follows: For the , the seasons are shifted by

Meteorological seasons better reflect the actual weather experienced on the ground. The "lag of seasons" dictates that the warmest and coldest temperatures occur weeks after the maximum and minimum solar insolation. By starting summer on June 1, the meteorological calendar captures the warming trend that leads up to the solstice and the peak heat that follows, offering a more accurate picture of the "summer" weather pattern. meteorologists can provide more accurate forecasts