ラスベガスの月別の天気

Las Vegas has a subtropical hot desert climate with short winters with mild days and cool nights; and long, extremely hot summers. July has the hottest temperatures with an average daytime high of . On average, 78 days each year reach or exceed and 10 days reach . The days of the year with the highest temperatures have a daytime high at or above . During the peak intensity of summer, overnight lows frequently remain above , and occasionally above . Snowfall is rare, and typically occurs only once every few years.

Las Vegas forum threads describe January as surprisingly variable for a desert destination, with daytime highs typically in the mid-to-upper 50s Fahrenheit but posters reporting anywhere from the 30s to the 70s depending on the specific week. The bigger consistent theme was the day-to-night swing: it can feel genuinely pleasant in the sun by afternoon, then drop sharply once the sun sets, with lows commonly in the mid-to-upper 30s. A few posters mentioned occasional snowflakes or de-icing on unusually cold years, while others reported warm enough days to sit by the pool - the standard advice across threads was to layer up and not assume desert weather means consistently warm.

February is the month regulars warn is not a pool holiday. Most resort pools are closed for the season; a handful of the big properties keep a heated one open, and if yours is shut you are usually told at check-in which neighbour will have you. Outdoor dining and club terraces are largely closed too, and walking the strip after dark is genuinely unpleasant. Our row shows why: 18C by day reads as 14C, and 6.8C at night reads as 3C, on 40 percent humidity and a dew point of minus 4.9C - desert air keeps nothing after sunset. Rain is 14mm across 1.9 days. The record: 9.4 hours of sun, a 14.4 kph wind and AQI 43.

March is the month the Las Vegas forum calls the most erratic of the year - 80s one year, struggling out of the 50s the next - with an average high near 70F, an average low near 45F, and a reputation as one of the windier, cloudier months. Wind and cloud together make it feel a good deal cooler than the number suggests. The practical question is the pools: many open by mid-March for spring break, and the realistic expectation for the end of the month is a mix of pool days and days too cool for it. Pack layers and keep an indoor plan. The record: 21.8C days that feel like 18C, 10.3C nights, 2 precipitation days, humidity 36 percent and 10.5 hours of sun.

Las Vegas forum regulars are consistent that April splits into two different months: “MOST years you will not have good pool weather the 1st week of April, but you will have pool weather the last week,” with the average daytime high climbing from around 78°F early in the month toward the 80s by the end. The gap that catches visitors off guard isn't the day, it's the night — “feels like summer during the day, but it is cold at night,” a swing wide enough that a light jacket is standard advice alongside shorts. Rain is a non-issue — April is “typically the second driest month of the year” here — but wind picks up heading into May and can cost a pool day. Our record: 27.2°C days, 13°C nights, only 1.6 rain days and 18.2% humidity — warm and bone-dry, with the day-night swing the forum's “cold at night” warning describes.

Regulars are consistent that the dry heat here is a real, meaningfully different experience than a humid climate at the same temperature - sauna heat rather than steam room heat, with sweat evaporating fast enough that feeling sticky isn't really a problem. Our row backs the dry read directly, 32.1C reading as a real 29C, over 19.5C nights, with rain almost entirely absent, 4.5mm across under a day, and humidity down to a desert-dry 21 percent. Regulars are specific that the first two weeks tend to run more comfortable, with the back half of the month often pushing toward 100 Fahrenheit and nights that stay warmer too as the month wears on. The record: 12.9 hours of sun, a 16.7 kph wind and AQI 64.

October is the month Las Vegas regulars rate highest — "if there is a better time I haven't found it" is a common line about the first two weeks. Days average around 28°C, effectively rain-free, and most are still pool weather, though that isn't guaranteed and the daily high falls more than 5°C across the month. The warning they repeat is about the desert night: lows near 14°C, and the temperature drops fast once the sun goes, catching out people who leave the hotel at 4pm in short sleeves and are shivering by 7.

Regulars describe November here as sunny days and cool, often windy nights, and the numbers are starker than that sounds. Our row gives 20.9C by day but a felt 18C, and 9.1C at night that feels like 5C - a desert November at 34 percent humidity with a dew point of minus 4.1C loses its heat the moment the sun goes. Their verdict on the pools is worth having before booking: mid-November is very iffy even where the water is heated, and several resorts keep only one pool open. Rain is 6.7mm in the month. Take a light layer for the day and a proper coat for the evening. The record: 8.9 hours of sun, a 12.6 kph wind and AQI 38.