( written on 25052015)
What is the symbolism of Lord Parjanya ? He is the Twelfth Sun, amongst the Dwadasa Adityas, mythologically the twelve sons of Aditi, the White Mother of the Superconscient Infinite. The Sun in Mesha is Vidhatha and the Sun in Pisces is Parjanya. It should be noted that when He transited Meena, precipitation occurred. It started raining here from March onwards !
Yes, from Uthrattathi Njattuvela onwards. Many thought they were summer rains, but in actuality they were pre Monsoon showers ! Meena and Mesha are months before Edava Pathi !

His passage through the 27 constellations, the 27 Jnattuvelas,, causes Rainfall and vegetation, from which cometh food, Adityath Jayathe Vrishti / Vrishter Annam Thada Praja.

Photo given is that of Parjanya Yajna.