The last time Phoenix didn’t reach 110 F (43.3 C) was June 29, when it hit 108 (42.2 C). “Long-term exposure to heat is more difficult to withstand than single hot days, especially if it is not cooling off at night enough to sleep well,” said Katharine Jacobs, director of the Center for Climate Adaptation Science and Solutions at the University of Arizona. What’s going on in a metropolitan area known as the Valley of the Sun is far worse than a short spike in the thermometer, experts said, and it poses a health danger to many. The length of Phoenix’s heat wave is notable even during a summer in which much of the southern United States and the world as a whole has been cooking in record temperatures, something scientists say is stoked by climate change. It’s “pretty miserable when you don’t have any recovery overnight,” said National Weather Service meteorologist Matt Salerno. That hit nine straight days with Tuesday’s overnight low of 94. It was the eighth straight day of temperatures not falling below 90 F (32.2 C), another record. Phoenix’s low of 95 F (35 C) on Monday was its highest overnight low ever, toppling the previous record of 93 F (33.8 C) set in 2009. Nighttime has offered little relief from the brutal temperatures.
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READ MORE: How to stay cool and safe during a heat wave cities on Tuesday, the 19th straight day the desert city was to see temperatures soar to 110 degrees Fahrenheit (43.3 C) or more. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.PHOENIX (AP) - Phoenix’s relentless streak of dangerously hot days was finally poised to smash a record for major U.S. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Guard yourself - Avoiding sunburn is suggested. Note: A daily high UV index of 3 in December leads to these guidelines: A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals. UV indexDecember is the month with the lowest UV index, with an average maximum UV index of 3. Sunshine December has the least sunshine of the year in Phoenix, with an average of 6.8h of sunshine. On the last day of December, sunrise is at 7:32 am and sunset at 5:30 pm MST. On the first day of the month, sunrise is at 7:14 am and sunset at 5:20 pm. DaylightWith an average of 10h and 0min of daylight, December has the shortest days of the year. SnowfallIn Phoenix, snow does not fall in January through August, October through December. Throughout the year, there are 44.6 rainfall days, and 5.04" of precipitation is accumulated. Rainfall In Phoenix, in December, during 5 rainfall days, 0.59" of precipitation is typically accumulated. HumidityWith an average relative humidity of 43%, December is the most humid month in Phoenix. TemperatureDecember is the coldest month in Phoenix, Arizona, exhibiting average temperatures of 63☏ at the peak and 47.8☏ at the base.
Despite the abundant sunshine and blue skies, the chilly touch of winter is unmistakeable in Phoenix this month. The city transforms into a winter wonderland with holiday decorations embellishing every corner. Average high temperatures drop even further to a bearable 63☏, confirming the onset of winter. As the city greets the last month of the year, a soothing chill fills the air. December in Phoenix rounds off the year under the gentle glow of winter sun.
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