A hot day is in store for Arizona, with temperatures cooling throughout the week

Put away your fall candles and keep out your pool towels because Phoenix is still going to see blistering temperatures for the rest of this weekend.

Though Phoenix will be hot on Sunday, with a temperature forecast at 108 degrees, and an excessive heat warning issued by the National Weather Service, temperatures were expected to decline into the low 100s as the week progresses.

The excessive heat warning is in effect until 8 p.m. Sunday.

Increasing clouds will bring some slight relief starting Sunday with temperatures gradually cooling off early in the week as high pressure weakens across the area, the National Weather Service forecast discussion read.

On Sunday, the Valley will see partly sunny skies with a breeze of 5 to 20 mph and a high near 108 degrees. As the Valley moves into the evening, the National Weather Service forecast mostly cloudy skies with winds slowing down and a low temperature of 88 degrees.

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Starting on Monday, high temperatures were forecast to drop to 104 degrees, and as the week moves onward, there will be promising declining high temperatures for the Valley. The current forecast for this upcoming Friday is a high of 100 degrees.

"Drying conditions will then occur late next week with temperatures hovering right around normal," Phoenix's forecast discussion read.

Lows also start to creep down beginning on Monday with a low temperature of 85 degrees. Moving into later in the week, the National Weather Service has forecast lows in the 70s, which some Arizonans may find chilly enough for that fall sweater.

Hot day forecast for Flagstaff; chances of rain later this week

A hot day is ahead for Flagstaff. Though the leaves haven't started changing colors, temperatures will begin to change by the end of the week with chances of rain scattered throughout.The National Weather Service said temperatures were currently 5 to 10 degrees above normal for this time of year. They were expected to return to normal later in the week.

"Showers and thunderstorms with varying amounts of coverage will continue each day," the Flagstaff National Weather Service forecast discussion read. "Widespread rainfall will be possible the first half of next week before much drier weather moves in by the following weekend. The increase in moisture next week will put an end to our above-average daytime temperatures."

The National Weather Service has forecast a high near 82 degrees for Flagstaff on Sunday with partly sunny skies and wind gusts that could get as high as 23 mph. After 11 a.m., there was a 20% chance of showers.

At night, temperatures were expected to dip into the 50s with wind lowering to 16 mph.

Flagstaff should immediately cool down on Monday with a high near 77 degrees, and as the week goes on, high temperatures should continue to dip into the low 70s with low temperatures forecast in the mid-40s.

Tucson under heat warning on Sunday, is expected to cool down midweek

Tucson is under an excessive heat warning issued by the National Weather Service until 8 p.m. Sunday. Like Phoenix, the southern desert city was expected to see a high of 108 degrees with sunny skies.

"High pressure over the area will result in high temperatures running around 10 degrees hotter than average this weekend," the National Weather Service forecast for Tucson read.

By the end of this week, the National Weather Service is forecasting that Tucson will have highs out of the triple digits with a high near 98 degrees on Thursday and Friday.

Scattered throughout the week is a 30% chance for thunderstorms.

"Small chance of storms near the Mexico border and the White Mountains through Sunday," the discussion read. "Temperatures dropping closer to normal during the workweek with a bit more moisture for a chance of some showers and storms."

The low for Sunday in Tucson should be about 79, but low temperatures will dip into the low 70s later in the week, according to the National Weather Service.

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This article originally appeared on Arizona Republic: Summer weather over? Hot day for Arizona; temps to cool during week