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Tymor

Tymhorau

Gaeaf
Gwanwyn
Haf
Hydref

Rhan o'r flwyddyn yw tymor sydd â newidiadau mewn tywydd, ecoleg, ac oriau golau dydd. Ceir pedair rhan: gwanwyn, haf, hydref a gaeaf. Natur a newid yn y tywydd sy'n ffurffio'r tymhorau a hynny cylchdroad y blaned o gwmpas yr Haul. Arferai'r Celtiaid ddathlu dechrau a diwedd y tymhorau e.e. Alban Hefin, sef dydd hiraf y flwyddyn. Ceir cyfeiriadau llu at y tymhorau gan feirdd y canrifoedd e.e. yr awdl "Gwanwyn" gan Dic Jones neu'r awdl "Yr Haf" gan R. Williams Parry.

Eginyn erthygl sydd uchod am ddaearyddiaeth. Gallwch helpu Wicipedia drwy ychwanegu ato.
Chwiliwch am tymor
yn Wiciadur.
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Tymor
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