This report describes the typical weather at the Denver International Airport (Denver, Colorado, United States) weather station over the course of an average March. It is based on the historical records from 1995 to 2012. Earlier records are either unavailable or unreliable.
Denver, Colorado has a cold semi-arid steppe climate. The area within 25 mi of this station is covered by grasslands (86%), built-up areas (10%), and croplands (3%).
The month of March is characterized by rising daily high temperatures, with daily highs ranging from 49°F to 57°F over the course of the month, exceeding 72°F or dropping below 34°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 1:19 hours, implying an average day-over-day increase of 2.5 minutes.
The shortest day of the month is March 1 with 11:21 hours of daylight; the longest day is March 31 with 12:39 hours of daylight.
The earliest sunrise is at 6:17am on March 10; the latest sunset is at 7:22pm on March 31; the latest sunrise is at 7:16am on March 11; the earliest sunset is at 5:51pm on March 1.
Daylight savings time (DST) starts at 3:00am on March 11, 2012, shifting sunrise and sunset to an hour later.
The median cloud cover is 68% (partly cloudy) and does not vary substantially over the course of the month.
On March 16, a representative day, the sky is clear or mostly clear 24% of the time, partly cloudy 26% of the time, and mostly cloudy or overcast 49% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 31, occurring in 35% of days. Precipitation is least likely around March 2, occurring in 29% 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 58% of those days with precipitation. It is most likely around March 1, when it is observed during 21% of all days.
Moderate snow is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around March 31, when it is observed during 6% of all days.
Light rain is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around March 31, when it is observed during 5% of all days.
The likelihood of snow falling is highest around March 1, occurring in 25% of days.
Accumulation at this location in March is unlikely. The chances of there being snow on the ground are highest around March 11, occurring 10% of the time.
The snow is typically at its deepest on March 26, with a median depth of 3.5"; the depth exceeds 4.9" only one year out of ten.
The relative humidity typically ranges from 27% (dry) to 79% (humid) over the course of a typical March, rarely dropping below 10% (very dry) and reaching as high as 98% (very humid).
The air is driest around March 13, at which time the relative humidity drops below 34% (comfortable) three days out of four; it is most humid around March 31, rising above 68% (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 March, the dew point typically varies from 10°F (dry) to 30°F (dry) and is rarely below -1°F (dry) or above 37°F (dry).
Over the course of March typical wind speeds vary from 1 mph to 21 mph (light air to fresh breeze), rarely exceeding 30 mph (strong breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around March 31, at which time the average daily maximum wind speed is 21 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around March 7, at which time the average daily maximum wind speed is 18 mph (fresh breeze).