Climateby Month

Phoenix vs Las Vegas weather

Phoenix, AZ and Las Vegas, NV · 256 mi apart

July highs: 107°F in Phoenix, 105°F in Las Vegas (Phoenix is 2°F warmer). January highs: 68°F and 59°F (Phoenix is 9°F warmer). Phoenix has about 33 wet days a year, Las Vegas about 26. Muggy days: about 12 a year in Phoenix, about 1 in Las Vegas.

Phoenix, AZ

20°40°60°80°100°120° January: normal high 68°F (20°C), low 46°F (8°C) February: normal high 71°F (22°C), low 49°F (9°C) March: normal high 78°F (26°C), low 55°F (13°C) April: normal high 86°F (30°C), low 61°F (16°C) May: normal high 95°F (35°C), low 70°F (21°C) June: normal high 104°F (40°C), low 79°F (26°C) July: normal high 107°F (42°C), low 85°F (29°C) 107° 85° August: normal high 105°F (41°C), low 84°F (29°C) September: normal high 100°F (38°C), low 78°F (26°C) October: normal high 89°F (32°C), low 66°F (19°C) November: normal high 77°F (25°C), low 54°F (12°C) December: normal high 66°F (19°C), low 45°F (7°C) 66° 45° JFMAMJJASOND

Best months: January, February

Las Vegas, NV

20°40°60°80°100°120° January: normal high 59°F (15°C), low 41°F (5°C) February: normal high 63°F (17°C), low 44°F (7°C) March: normal high 71°F (22°C), low 51°F (11°C) April: normal high 79°F (26°C), low 57°F (14°C) May: normal high 89°F (32°C), low 66°F (19°C) June: normal high 99°F (37°C), low 76°F (24°C) July: normal high 105°F (41°C), low 82°F (28°C) 105° 82° August: normal high 103°F (39°C), low 81°F (27°C) September: normal high 95°F (35°C), low 72°F (22°C) October: normal high 81°F (27°C), low 60°F (16°C) November: normal high 67°F (19°C), low 47°F (8°C) December: normal high 57°F (14°C), low 40°F (4°C) 57° 40° JFMAMJJASOND

Best months: March

Which city for what

  • Milder winters: Phoenix (January high 68°F vs January high 59°F)
  • Less humid: Las Vegas (1 muggy days vs 12 muggy days)
  • More comfortable days: Phoenix (104 a year vs 93 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high PhoenixAvg high Las VegasWet days PhoenixWet days Las Vegas
Winter (Dec-Feb)68°F59°F1210
Spring (Mar-May)86°F79°F66
Summer (Jun-Aug)105°F102°F95
Fall (Sep-Nov)89°F81°F75

Side by side over a year

PhoenixLas Vegas
Hot days (90°F+)173137
Freezing nights110
Muggy days121
Comfortable days10493
Precipitation7.2 in4.2 in
Snowfall0.0 in0.2 in
Frost datesfrost in about 18% of yearslast Jan 20, first Dec 15
Daylight in June / December14.3 h / 10.0 h14.6 h / 9.7 h
Best monthsJanuary, FebruaryMarch

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.

Month by month

MonthHigh PhoenixHigh Las VegasWet days PhoenixWet days Las Vegas
January68°F59°F43
February71°F63°F44
March78°F71°F33
April86°F79°F22
May95°F89°F11
June104°F99°F10
July107°F105°F43
August105°F103°F52
September100°F95°F32
October89°F81°F22
November77°F67°F22
December66°F57°F43

Both charts use the same temperature scale.

Where the numbers come from

  • Phoenix, AZ: temperature from Phoenix Sky Harbor Intl Airport (USW00023183), 4.3 mi ESE of the city center; precipitation from Phoenix Sky Harbor Intl Airport (USW00023183). NOAA 1991-2020 normals and daily records.
  • Las Vegas, NV: temperature from Las Vegas Mccarran Airport (USW00023169), 7.3 mi SSW of the city center; precipitation from Las Vegas Mccarran Airport (USW00023169). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.