NOAA astronomical spring Spring… meteorologically speaking a calendar marker based on annual temperatures according to the astronomical calendar NOAA Spring… meteorologically speaking meteorological summer traditional astronomical seasons Meteorological nor Astronomical Winter according to the astronomical calendar according to the astronomical calendar "Meteorological vs. Astronomical Seasons" summer according to the astronomical calendar NOAA actually mark a calendar marker based on annual temperatures meteorological summer bees’ calendar started on the 1st of June NOAA meteorological summer NOAA a calendar marker based on annual temperatures according to the astronomical calendar according to the astronomical calendar a calendar marker based on annual temperatures NOAA Spring… meteorologically speaking bees’ calendar meteorological calendar meteorological or astronomical seasons Meteorological spring a calendar marker based on annual temperatures meteorological summer Source for the italicized text. meteorological summer according to the astronomical calendar NOAA NOAA Astronomical summer is defined Spring… meteorologically speaking according to the astronomical calendar unofficial according to the astronomical calendar