Phoenix experiences unprecedented heatwave

Wednesday, August 2, 2023


Phoenix had an extraordinary heatwave in July 2023, surpassing all-time temperature records. With an average temperature of 102.7 degrees Fahrenheit, the month not only became the warmest July ever recorded, but it also established a new record for the hottest month in Phoenix’s history.

The blistering heat remained for 30 of the 31 days, with highs at or above 110 degrees Fahrenheit on 19 times and nights failing to drop below 90 degrees on another. The previous record for straight days with such high temperatures, which dates back to 1895, was broken by this heatwave. The previous record of 18 days was achieved in 1974, therefore the new record of 31 days represents a tremendous accomplishment.

Meteorologists were astounded when Phoenix broke the previous record by such a huge margin, given that monthly temperature records are normally broken by a few tenths of a degree. While temperatures are currently cooling, with highs expected to remain below 110 degrees F due to increased cloud cover, thunderstorm activity, and higher humidity levels, the danger zone and AccuWeather RealFeel Temperatures near 110 degrees will persist during the afternoon and evening hours.

Temperatures exceeding 110 degrees Fahrenheit are predicted to return in the coming days as hot and dry conditions reappear. Despite the monsoon trend, the Phoenix region is only expected to get occasional rainfall.

The intense heatwave also resulted in a warm night record, with temperatures above 90 degrees for 16 consecutive nights. Previously, a record of 11 consecutive nights with lows of 90 or above was achieved in 2020. On July 19, the nighttime low temperature of 97 degrees beat the record for the greatest lowest temperature ever recorded.

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