| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.8° | 4° | 14.4mm | 3.3 | 77 |
| February | 17.2° | 5.8° | 17.6mm | 3.5 | 84 |
| March | 21.7° | 9.5° | 8.2mm | 2.3 | 95 |
| April | 26.2° | 13.2° | 6.4mm | 1.3 | 97 |
| May | 31.6° | 18.3° | 1.8mm | 0.9 | 80 |
| June | 38.1° | 23.7° | 0.7mm | 0.2 | 55 |
| July | 40.8° | 27.2° | 3.4mm | 1.4 | 42 |
| August | 39.2° | 25.7° | 8.1mm | 1.6 | 48 |
| September | 35.2° | 21.7° | 6.4mm | 1.4 | 64 |
| October | 27.4° | 14.7° | 8.9mm | 1.8 | 95 |
| November | 19.8° | 7.8° | 7.2mm | 1.2 | 97 |
| December | 14.1° | 3.7° | 10.1mm | 2.7 | 76 |
January in Las Vegas averages a daily high of 14.8°C with nights around 4°C. Expect roughly 3.3 wet days totalling 14.4mm. Comfortable conditions for being outdoors all day.
February in Las Vegas averages a daily high of 17.2°C with nights around 5.8°C. Expect roughly 3.5 wet days totalling 17.6mm. Comfortable conditions for being outdoors all day.
March in Las Vegas averages a daily high of 21.7°C with nights around 9.5°C. Rain is rare — about 2.3 wet days and 8.2mm across the month. Comfortable conditions for being outdoors all day.
April in Las Vegas averages a daily high of 26.2°C with nights around 13.2°C. Rain is rare — about 1.3 wet days and 6.4mm across the month. Comfortable conditions for being outdoors all day.
May in Las Vegas averages a daily high of 31.6°C with nights around 18.3°C. Rain is rare — about 0.9 wet days and 1.8mm across the month. Comfortable conditions for being outdoors all day.
June in Las Vegas averages a daily high of 38.1°C with nights around 23.7°C. Rain is rare — about 0.2 wet days and 0.7mm across the month. Generally workable, with some weather to plan around.
July in Las Vegas averages a daily high of 40.8°C with nights around 27.2°C. Rain is rare — about 1.4 wet days and 3.4mm across the month. Demanding conditions — pack for it and plan indoor options.
August in Las Vegas averages a daily high of 39.2°C with nights around 25.7°C. Rain is rare — about 1.6 wet days and 8.1mm across the month. Demanding conditions — pack for it and plan indoor options.
September in Las Vegas averages a daily high of 35.2°C with nights around 21.7°C. Rain is rare — about 1.4 wet days and 6.4mm across the month. Generally workable, with some weather to plan around.
October in Las Vegas averages a daily high of 27.4°C with nights around 14.7°C. Rain is rare — about 1.8 wet days and 8.9mm across the month. Comfortable conditions for being outdoors all day.
November in Las Vegas averages a daily high of 19.8°C with nights around 7.8°C. Rain is rare — about 1.2 wet days and 7.2mm across the month. Comfortable conditions for being outdoors all day.
December in Las Vegas averages a daily high of 14.1°C with nights around 3.7°C. Rain is rare — about 2.7 wet days and 10.1mm across the month. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Las Vegas peaks at 97.
Based on 30 years of records, March–April scores highest for comfort in Las Vegas, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 40.8°C.
February is the wettest, averaging 17.6mm of rain across roughly 3.5 wet days.
December is the coolest month, with average daily highs around 14.1°C.