Do you want to get rid of this scorching summer and enjoy rains?

Read astaghfar all time time.

“Astaghfirullah al-lathi laa ilaha illa huwa, al-Hayyul Qayyum wa atubu ilayh” –

"Ask forgiveness of your Lord. Truly He is Oft-Forgiving. He will send rain to you in abundance; increase you in wealth and children; grant you gardens and bestow
on you rivers."'" [Nuh (71):10-12]

A man once came to al-Hasan al-Basri and complained to him: “The sky does not shower us with rain.” He replied: “Seek Allah’s forgiveness (i.e. say ﺃﺳﺘﻐﻔﺮ ﺃﻟﻠﻪ ).”

Also the below can be recited for Rain.

Transliteration
Allaahumma 'asqinaa ghaythan mugheethan maree'an maree'an, naafi'an ghayradhaarrin, 'aajilan ghayra 'aajilin.

Translation
O Allah, shower upon us abundant rain,
beneficial not harmful, swiftly and not delayed.

Abu Dawud 1/303. See also Al-Albani Sahih Abu Dawud
1/216.

Source : www.Religioustutor.blogspot.in