This report describes the typical weather at the Tucson International Airport (Tucson, Arizona, United States) weather station over the course of an average February. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Tucson, Arizona has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by shrublands (70%), grasslands (23%), forests (4%), and built-up areas (3%).
The month of February is characterized by rising daily high temperatures, with daily highs increasing from 66°F to 71°F over the course of the month, exceeding 81°F or dropping below 56°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 50 minutes, implying an average day-over-day increase of 1.7 minutes.
The shortest day of the month is February 1 with 10:39 hours of daylight; the longest day is February 29 with 11:30 hours of daylight.
The earliest sunrise is at 6:52am on February 29; the latest sunset is at 6:21pm on February 29; the latest sunrise is at 7:18am on February 1; the earliest sunset is at 5:57pm on February 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 8% (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 63% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 24% of the time.
The average probability that some form of precipitation will be observed in a given day is 18%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 52% of those days with precipitation. It is most likely around February 2, when it is observed during 10% of all days.
Moderate rain is the most severe precipitation observed during 30% of those days with precipitation. It is most likely around February 1, when it is observed during 6% 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 20% (dry) to 71% (humid) over the course of a typical February, rarely dropping below 8% (very dry) and reaching as high as 99% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 26% (dry) three days out of four; it is most humid around February 1, rising above 54% (mildly humid) 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 22°F (dry) to 35°F (dry) and is rarely below 6°F (dry) or above 48°F (dry).
Over the course of February typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around February 29, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around February 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).