• It will be a calm night
• No wind
• Not too hot nor too cold ¹
• Peaceful night ²
• Moon looks like a plate (bowl). Some narrations say it will look like half a plate (bowl). ³
• Possibility of rain
• The sun won’t have rays the following morning ^1,4

Sources used:

[1] – Sahih Al-Jami’/ibn Khuzaymah

[2] – Quran [97:5]

[3] – Muslim

[4] – Ahmad