In reply to Aeon:
No, that's why they guide Manaslu in the post-monsoon, despite that not being the best season for it.
Sub-7000m snow conditions are often poor in pre-monsoon Nepal. Lingering winter snow melting, no refreezing, clouds building up from late-April to start of monsoon, getting warmer and cloudier when you want it to be clearer and colder.
Anyway, if you want the stats check the Himalayan Database.