1. most uncomfortably hot and humid
Usage: superlative form of muggy

Examples

• August was the muggiest month of the summer.
• The muggiest day of the year made everyone stay indoors.
• Even with air conditioning, it felt like the muggiest afternoon ever.
• The weather forecast predicted the muggiest conditions in weeks.
• She complained that this was the muggiest climate she had ever experienced.
• The muggiest part of the day was right after the thunderstorm.