What is the version of the following sentence with correct punctuation?

On Saturday we can expect mainly cloudless weather Morning temperatures will be around 21 C During the day they will reach a maximum of 38 C Low temperatures at night will be around 17C Southwesterly winds are weak


On Saturday we can expect mainly cloudless weather. Morning temperatures will be around 21 °C. During the day they will reach a maximum of 38 °C. Low temperatures at night will be around 17°C. Southwesterly winds are weak.