http://www.timeanddate.com/astronomy/meteor-shower/perseid.html
Perseids meteor shower for Las Vegas (Night between Aug 10 and Aug 11)
Time Azimuth/Direction Altitude
Sun 9:00 PM 20°North-northeast 9.6°
Sun 10:00 PM 26°North-northeast 14.3°
Sun 11:00 PM 32°North-northeast 20.2°
Midnight Sun-Mon 36°Northeast 27.0°
Mon 1:00 AM 39°Northeast 34.5°
Mon 2:00 AM 41°Northeast 42.3°
Mon 3:00 AM 40°Northeast 50.3°
Mon 4:00 AM 36°Northeast 57.8°
Mon 5:00 AM 26°North-northeast 64.1°