Las Vegas in September

March through May offers perfect weather with highs in the 70s and 80s. The pools open but haven't reached peak season pricing yet. October through November works similarly — warm enough for outdoor activities but cool enough to walk the Strip comfortably. Summer means 110-degree heat that makes walking outside genuinely dangerous during peak afternoon hours. But hotel rates drop significantly, and every casino cranks the AC to arctic levels. If you can handle darting between air-conditioned spaces, you'll save hundreds on accommodations. Winter brings surprisingly chilly weather with lows in the 30s, though daytime temperatures still reach the 50s and 60s. The holiday season transforms the Strip with elaborate decorations, but New Year's Eve crowds reach claustrophobic levels. Book early or avoid entirely unless you enjoy being packed shoulder-to-shoulder with 300,000 other people.