Biosphere - Animals migrate seasonally, plants grow and reproduce depending on the time of year. Some plants drop their leaves, some seeds will not grow without a cold period. Lithosphere - soil moisture is different at different times of the year. Also falling leaves are added to the soil in some places. Hydrosphere - The water cycle is strongly affected by the season and how much energy there is.
More heat means more evaporation.
Rivers are dry or full depending on the season. Seasonal flooding and snow melting affects the environment.