PHOENIX, AZ – Morning light spills across the Valley of the Sun, glinting off dry rooftops and clear desert skies. Autumn may be on the calendar, but summer heat refuses to fade just yet—temperatures are climbing toward 90°F again today, with even warmer highs expected through midweek.
According to the National Weather Service in Phoenix, calm winds and strong sunshine will dominate through Wednesday as a high-pressure ridge anchors over the Southwest. Highs near 91°F Tuesday and around 90°F Wednesday will make this stretch feel more like early September than late October. The pattern remains dry and stable, with humidity staying below 20%, keeping air quality in fair shape but raising fire weather concerns in open desert areas west of I-17.
Residents planning outdoor work or school sports should stay hydrated and use caution on long hikes, especially during the midafternoon heat window from 1 to 4 p.m. The city’s pavement and metal surfaces will still radiate summer-like warmth well after sunset.
By Thursday and Friday, a subtle cooling trend brings highs back into the upper 80s—still bright, but with lighter breezes and slightly cooler nights. That shift sets up an ideal stretch for pre-Halloween decorating, late-yard cleanup, or evening events across Maricopa County.
Looking beyond Halloween, early signs point to a modest pattern change for the first week of November. Slightly cooler desert mornings are likely as northern storms deepen across the West—a gentle reminder that a chilly November ahead may finally tap the brakes on Arizona’s lingering warmth.
Five-Day Forecast for Phoenix, AZ:
Mon: 89/63 – Sunny; light east breeze.
Tue: 91/64 – Hot and dry; near-record heat for late October.
Wed: 90/65 – Sunny; very warm, light wind.
Thu: 89/63 – Mostly sunny; gradual cooling trend.
Fri: 87/62 – Clear and mild; ideal Halloween setup.
