Lyrics were contributed by Ramnath's mother and singer-composer Bombay Jayashri, Manu Manjith, Vaishakh Sugunan, Sanjeeta Bhattacharya and Vineeth himself, which are mostly in Malayalam and Tamil-languages.

In July 2023, it was announced that independent musician Amrit Ramnath, son of singer-composer Bombay Jayashri, would make his feature film composition debut through Varshangalkku Shesham.

[1][2] Ramnath described it as a "rewarding experience" that allowed him to provide a cohesive audio-visual narrative and explore several emotional landscapes to enhance the storytelling through the film's music.

[6][7] Ramnath made a mini studio in the hospital room consisting of a MIDI and microphone and a guitar he bought from a nearby garage for £40 (₹4,210.83) and composed three tracks during that period.

[19] Critic based at The Indian Express praised Vineeth for the lyrics being "cleverly penned" on describing both women and wine in the song "Madhu Pakaroo".

[23] Sruthi Ganapathy Raman of Film Companion South wrote "Composer Amrit Ramnath’s score is a fantastic marriage of the rush of youth and mesmerising simplicity of the past.

"[24] Anandu Suresh of The Indian Express wrote "Amrit Ramnath’s music and background score leave a strong impression overall, though they occasionally miss the mark.

"[25] Deepa Soman of Manorama Online wrote "Amrit Ramnath’s songs, mixing yesteryear elements in the right proportions with contemporary music, also keep the audience interested in the proceedings.