Phoenix Arizona is the hottest and sunniest city in the United States, and May and June are when the transition from pleasantly warm to blazing hot takes places. The average high temperature increases 18 degrees from May 1st to the June 30th, up to an average of 106 degrees. That’s just the average; temperatures in 110s and even 120s are possible! Of course it’s a “dry heat”, and that does make a difference in the way you will be able to handle this incredible heat. Indeed most locals will tell you it’s not really hot until it gets up above 105 or so.
May Phoenix Weather
The highest recorded temperature for Phoenix for the past 73 years in May was 113 degrees Fahrenheit, most recently measured on May 28, 1984, and the standard high is 94. In the last 73 years the highest reported temperature in Phoenix for May was 40 most recently encountered on May 8, 1967, while the standard low daily temperature for the month is 67.
United States National Weather Service historical weather data indicates that on May 14, 1951, the measured high temperature did not exceed 64 degrees Fahrenheit, the lowest high measured in Phoenix in the past 73 years. Weather Service records also indicate that on May 29, 1983, the low temperature for the day was not measured below 86 degrees, the highest low measured in Phoenix in the last 73 years.
Historical weather data accumulated by the National Weather Service shows that the average daily high temperature in Phoenix on May First is 88 degrees Fahrenheit and the average high on the last day of May is 98 degrees. The low temperature in Phoenix in May on the first day of the month averages 60 degrees and the low temperature on the last day of the month averages 69 degrees.
Phoenix receives an average of 0.16 inches of precipitation during May. The most precipitation recorded on a single day in May was 0.91 inches on May 4, 1976.
June Phoenix Weather
In the last 73 years the highest measured June temperature in Phoenix was 122 degrees Fahrenheit, measured on June 26, 1990, while the regular high temperature is 104. The lowest reported temperature in June for Phoenix for the past 73 years was 51 most recently encountered on June 3, 1965, while the typical low recorded temperature is 76.
US National Weather Service historical weather data records that on June 4, 1999, the high temperature did not exceed 75 degrees Fahrenheit, the lowest high measured in Phoenix in the past 73 years. Weather Service records additionally show that on June 27, 1990, the recorded low temperature for the day did not drop below 93 degrees, the highest low measured in Phoenix in the last 73 years.
National Weather Service records indicate that the high temperature in Phoenix on June First averages 98 degrees and the high on the last day of the month averages 106 degrees. The low temperature in Phoenix in June on the first day of the month averages 69 degrees and the low temperature on the last day of the month averages 78 degrees.
Phoenix receives an average of 0.09 inches of precipitation during June. On June 22, 1972 Phoenix received 1.37 inches of precipitation, the most rain recorded in a single day in June.
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