Dear Mufti Saheb
Could you please tell me what dua should be recited during a cold day.
As-salāmu ‘Alaykum Wa-rahmatullāhi Wa-barakātuh.
In the Name of Allāh, the Most Gracious, the Most Merciful.
Sayyiduna Abu Hurairah Radiyallahu Anhu narrates that the following Dua should be recited on a cold day;
لَا إلٰهَ إلَّا اللهُ مَا أشَدَّ بَرْدَ هٰذَا الْيَومِ
ألَلّٰهُمَّ أَجِرْنِيْ مِنْ زَمْهَريْرِ جَهَنَّمْ
There is no God besides Allah Ta‘ala how severe is the cold of this day.
O’ Allah save me from the cold of Jahannam.
The cold weather of winter should remind one of the ‘burning cold’ of Jahannam. Sayyiduna ibn Abaas Radiyallahu Anhu says, ‘The inmates of Jahannam will ask to be rescued from the excruciating heat of Jahannam. An icy cold wind will be blown upon them, which will cause their bones to ache after which they will beg for heat again.’
Rasulullah Sallalahu Allayhi Wassallam is reported to have said, ‘When a person recites the above Dua, Allah Ta‘ala says to Jahannam, ‘Indeed, a servant of mine has sought refuge in me from you, bear testimony that I have granted him salvation from you.’
And Allah Ta‘ala knows best
Mufti Luqman Hansrot
 Ibnus Sunni (‘Amalul Yawmi wal lalylah , Hadith 306)
Sayyiduna Abu Hurarah Radiyallahu Anhu reported that Rasulullah Sallalahu Allayhi Wassallam said: “ Jahannam complained to its lord saying ;”Oh My Lord ! Parts within me have devoured each other” So Allah Ta‘ala allowed it two breaths; one in summer and the other in winter. Therefore the extreme heat that you experience (on earth) is caused by the heat of jahannam and the severe cold too is due to the Az-zamhareer.(the extreme cold section of jahannam)
( Sahih Bukhari, hadith 537 & Sahih muslim).