Danube River Cruise in October

April through May offers mild weather and blooming apricot trees in the Wachau Valley. Summer brings 14-hour daylight but also crowds and heat. October delivers fall colors and harvest season in wine regions. November can be moody with fog, but you'll have castles to yourself. Winter cruises run December through March with Christmas market themes — cozy but limited daylight. River levels matter more than weather. Spring snowmelt can cause high water and itinerary changes. Drought in late summer sometimes forces smaller ships or bus transfers around shallow sections. Check recent water levels before booking.