Vidyapati, the well known poet of 14th /15th  century from Mithila in Bihar is known more for writing on romance between Krishna and Radha. An instance of romantic feelings being more intense in monsoon reads like this as translated in English:

How the rain falls

In deadly darkness

O’ gentle girl, the rain

Pours on your path

And roaming spirits straddle the wet night

She is afraid

Of loving for the first time