冬の平均気温は◯◯度で朝方は◯◯度まで下がることもあるって英語でなんて言うの？

"冬の平均気温は◯◯度で朝方は◯◯度まで下がることもある" - The average temperature in winter is XXX C and in the morning it can drop to XXX C. 夏は平均気温◯度ですが朝方や夜は寒いくらいの日もあります - The average temperature in the summer is XXX C but some early mornings and nights can tend to be on the colder side.