This report describes the typical weather at the Phoenix Deer Valley Airport (Phoenix, Arizona, United States) weather station over the course of an average February. It is based on the historical records from 1997 to 2012. Earlier records are either unavailable or unreliable.
Phoenix, Arizona has a hot desert climate. The area within 25 mi of this station is covered by shrublands (86%), grasslands (8%), built-up areas (3%), and croplands (2%).
The month of February is characterized by gradually rising daily high temperatures, with daily highs around 67°F throughout the month, exceeding 79°F or dropping below 57°F only one day in ten.
Over the course of February, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 53 minutes, implying an average day-over-day increase of 1.8 minutes.
The shortest day of the month is February 1 with 10:34 hours of daylight; the longest day is February 29 with 11:27 hours of daylight.
The earliest sunrise is at 6:58am on February 29; the latest sunset is at 6:25pm on February 29; the latest sunrise is at 7:26am on February 1; the earliest sunset is at 5:59pm on February 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 0% (clear) and does not vary substantially over the course of the month.
On February 15, a representative day, the sky is clear or mostly clear 77% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 15% of the time.
The average probability that some form of precipitation will be observed in a given day is 16%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are light rain, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 45% of those days with precipitation. It is most likely around February 7, when it is observed during 8% of all days.
Moderate rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around February 20, when it is observed during 5% of all days.
Thunderstorms are the most severe precipitation observed during 20% of those days with precipitation. They are most likely around February 27, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in February or this station does not reliably report precipitation types.
The relative humidity typically ranges from 25% (dry) to 61% (mildly humid) over the course of a typical February, rarely dropping below 10% (very dry), or exceeding 92% (very humid).
The air is driest around February 2, at which time the relative humidity drops below 31% (comfortable) three days out of four; it is most humid around February 21, rising above 41% (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 February, the dew point typically varies from 23°F (dry) to 36°F (dry) and is rarely below 8°F (dry) or above 48°F (dry).
Over the course of February typical wind speeds vary from 0 mph to 12 mph (calm to moderate breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around February 29, at which time the average daily maximum wind speed is 12 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around February 1, at which time the average daily maximum wind speed is 11 mph (gentle breeze).