1. most characterized by or full of sleet; having the most sleet
Usage: superlative form of sleety

Examples

• January was the sleetiest month of the winter.
• The sleetiest conditions made driving extremely dangerous.
• We experienced the sleetiest weather in decades.
• The sleetiest part of the storm hit around midnight.
• This has been the sleetiest winter on record.
• The sleetiest roads were closed to traffic.