This report describes the typical weather at the North Las Vegas Airport (Las Vegas, Nevada, United States) weather station over the course of an average January. It is based on the historical records from 1999 to 2012. Earlier records are either unavailable or unreliable.
Las Vegas, Nevada has a hot desert climate. The area within 25 mi of this station is covered by shrublands (94%) and built-up areas (4%).
The month of January is characterized by gradually rising daily high temperatures, with daily highs increasing from 56°F to 60°F over the course of the month, exceeding 68°F or dropping below 49°F only one day in ten.
Over the course of January, the length of the day is gradually increasing. The shortest day of the month is January 1 with 9:45 hours of daylight; the longest day is January 31 with 10:23 hours of daylight.
The earliest sunrise is at 6:43am on January 31; the latest sunset is at 5:06pm on January 31; the latest sunrise is at 6:53am on January 3; the earliest sunset is at 4:37pm on January 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover is 0% (clear) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 79% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 14% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around January 29, occurring in 15% of days. Precipitation is least likely around January 7, occurring in 11% of days.
Throughout January, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 62% of those days with precipitation. It is most likely around January 29, when it is observed during 10% of all days.
Moderate rain is the most severe precipitation observed during 24% of those days with precipitation. It is most likely around January 27, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 25% (dry) to 62% (mildly humid) over the course of a typical January, rarely dropping below 14% (very dry), or exceeding 88% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 29% (dry) three days out of four; it is most humid around January 1, rising above 47% (comfortable) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical January, the dew point typically varies from 19°F (dry) to 30°F (dry) and is rarely below 5°F (dry) or above 43°F (dry).
Over the course of January typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around January 31, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around January 3, at which time the average daily maximum wind speed is 11 mph (gentle breeze).