The summer it will be warmer than normal in most of the country except for the peninsular northwest, according to the seasonal forecast for the meteorological summer prepared by the State Meteorological Agency (AEMET).
Thus, between the months of June, July and August 2021 there is a greater probability that the temperature will be higher than usual in all of Spain except in the northwest of the peninsula. In the case of rainfall, he does not foresee any "significant" situation in any area.
The astronomical seasons of the year are those periods that extend between the equinoxes (points of the Earth's orbit around the Sun in which, because the Sun is located on the vertical of the equator, day and night have the same duration) and the solstices. (points where the Sun is on the vertical of one of the tropics).
In this way, the astronomical spring is the period between the spring equinox and the summer solstice, the astronomical summer elapses between the summer solstice and the autumn equinox, the astronomical autumn covers from the autumn equinox to the winter solstice and the astronomical winter is the period between the winter solstice and the spring equinox.
The duration of each of the stations is approximately three months. The dates and times of the solstices and equinoxes are not always the same and vary slightly from year to year.
The AEMET points out that, in order to carry out climatological studies, it is more practical define the meteorological stations by complete months, so that the meteorological spring includes the months of March, April and May; the meteorological summer those of June, July and August; the meteorological autumn, September, October and November; and the meteorological winter, December, January and February.