This report describes the typical weather at the Tucson International Airport (Tucson, Arizona, United States) weather station over the course of an average June. 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 June is characterized by rising daily high temperatures, with daily highs ranging from 95°F to 102°F over the course of the month, exceeding 107°F or dropping below 88°F only one day in ten.
Over the course of June, the length of the day is essentially constant. The shortest day of the month is June 1 with 14:07 hours of daylight; the longest day is June 15 with 14:15 hours of daylight.
The earliest sunrise is at 5:16am on June 13; the latest sunset is at 7:35pm on June 27; the latest sunrise is at 5:21am on June 30; the earliest sunset is at 7:26pm on June 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover ranges from 1% (clear) to 15% (mostly clear). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 14% from the start to the end of the month.
On June 1, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 88% of the time, and overcast or mostly cloudy 10% of the time.
On June 30, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 31% of the time, and clear or mostly clear 67% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around June 30, occurring in 32% of days. Precipitation is least likely around June 1, occurring in 11% of days.
Throughout June, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 74% of those days with precipitation. They are most likely around June 30, when it is observed during 24% of all days.
Light rain is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around June 30, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in June or this station does not reliably report precipitation types.
The relative humidity typically ranges from 10% (very dry) to 51% (mildly humid) over the course of a typical June, rarely dropping below 5% (very dry), or exceeding 93% (very humid).
The air is driest around June 6, at which time the relative humidity drops below 12% (very dry) three days out of four; it is most humid around June 30, rising above 31% (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 June, the dew point typically varies from 25°F (dry) to 52°F (very comfortable) and is rarely below 12°F (dry) or above 65°F (mildy humid).
Over the course of June typical wind speeds vary from 0 mph to 17 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around June 24, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around June 3, at which time the average daily maximum wind speed is 16 mph (moderate breeze).