Arizona Weather: Phoenix Heats Up Into the Upper 80s Through Sunday Before a Cooler Halloween Week Ahead

A calm, golden stretch continues across the Valley with highs pushing near 90°F by Sunday afternoon.

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Arizona weather
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Phoenix, AZ – The desert dawn breaks quiet and clear this Friday morning, the horizon glowing amber above Camelback Mountain. Air conditioners hum softly across the Valley as early sunshine ushers in another calm, mild start — a streak that shows no sign of breaking before Sunday.

The National Weather Service in Phoenix calls for sunny skies and highs around 84°F Friday, warming steadily into the upper 80s through the weekend. Winds remain light, mostly from the east and southwest, offering an ideal setup for outdoor plans — from early tailgates to late-evening walks beneath desert stars.

Saturday and Sunday will bring near-87°F highs, dry air, and that signature fall brightness that makes October in the Valley so inviting. Those attending outdoor markets, youth sports, or local pumpkin festivals should expect UV levels to remain high, so sunscreen and hydration remain essential.

To be fair, this warmth is typical for late October — but subtle shifts are brewing to the north. Models hint at cooler air settling into the Southwest by late next week, with highs possibly easing into the upper 70s just in time for Halloween festivities.

Until then, the steady sunshine remains the story: no rain, no storms, just a calm desert rhythm. By early November, though, that pattern may finally bend toward the cooler, crisp mornings Phoenix residents have been craving.

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