The monsoon season in Himachal Pradesh is from June to September. The monsoon is a seasonal wind pattern that brings heavy rains to South Asia. The monsoon winds blow from the southwest, bringing moisture from the Indian Ocean. The monsoon season is important for agriculture in Himachal Pradesh, as it provides the water needed for crops to grow. The monsoon also brings a cooler climate to the state.
The other options are incorrect because they are not the months of the monsoon season in Himachal Pradesh. October to December is the winter season, January to March is the spring season, and April to May is the summer season.