This report describes the typical weather at the Grand Canyon National Park Airport (Grand Canyon National Park, Arizona, United States) weather station over the course of an average March. It is based on the historical records from 1981 to 2012. Earlier records are either unavailable or unreliable.
Grand Canyon National Park, Arizona has a continental climate with dry warm summers. The area within 25 mi of this station is covered by shrublands (65%), grasslands (19%), and forests (16%).
The month of March is characterized by rising daily high temperatures, with daily highs increasing from 49°F to 56°F over the course of the month, exceeding 67°F or dropping below 36°F only one day in ten.
Over the course of March, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:08 hours, implying an average day-over-day increase of 2.2 minutes.
The shortest day of the month is March 1 with 11:26 hours of daylight; the longest day is March 31 with 12:34 hours of daylight.
The earliest sunrise is at 6:16am on March 31; the latest sunset is at 6:50pm on March 31; the latest sunrise is at 6:58am on March 1; the earliest sunset is at 6:24pm on March 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 19% (mostly clear) to 26% (mostly clear). The trend is for the sky to be clearing with the median cloud cover decreasing by 6% from the start to the end of the month.
On March 16, a representative day, the sky is clear or mostly clear 39% of the time, partly cloudy 8% of the time, and mostly cloudy or overcast 25% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 8, occurring in 27% of days. Precipitation is least likely around March 31, occurring in 23% of days.
Throughout March, the most common forms of precipitation are light snow, moderate snow, and light rain.
Light snow is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around March 1, when it is observed during 14% of all days.
Moderate snow is the most severe precipitation observed during 20% of those days with precipitation. It is most likely around March 5, when it is observed during 6% of all days.
Light rain is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around March 29, when it is observed during 5% of all days.
The likelihood of snow falling is highest around March 3, occurring in 21% of days.
Either snow rarely accumulates at this location in March or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 31% (comfortable) to 95% (very humid) over the course of a typical March, rarely dropping below 13% (very dry) and reaching as high as 100% (very humid).
The air is driest around March 31, at which time the relative humidity drops below 37% (comfortable) three days out of four; it is most humid around March 1, rising above 92% (very 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 March, the dew point typically varies from 14°F (dry) to 28°F (dry) and is rarely below 0°F (dry) or above 37°F (dry).
Over the course of March typical wind speeds vary from 0 mph to 15 mph (calm to moderate breeze), rarely exceeding 24 mph (strong breeze).
The highest average wind speed of 7 mph (light breeze) occurs around March 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around March 10, at which time the average daily maximum wind speed is 14 mph (moderate breeze).