For anyone planning to celebrate All Hallows’ Eve in Phoenix, the forecast, based on over a century of data, is reliably simple.

PHOENIX — Forget spooky chills and misty rain; Halloween in the Phoenix area is typically sunshine and warmth. For trick-or-treaters and partygoers, our desert climate offers a delightfully mild, often hot, experience that’s far removed from the stereotypical autumn chill felt in other parts of the country.

FORECAST: ‘Octoaster’ weather as Arizona basks in unseasonably warm, dry weather

Temperatures: Daytime Heat and Mild Evenings

Phoenix’s late-October weather often feels more like a mid-September day elsewhere. The historical data paints a clear picture of a warm holiday:

  • Average High Temperature: The typical daytime high for October 31st in Phoenix stands at a comfortable 83°. This means costume choices usually favor lighter materials!

  • Record High Temperature: The mercury has soared even higher. The all-time record high for Halloween in Phoenix was a blistering 96°, set back in 1988.  It’s a reminder that true desert heat can linger well into the fall.

While the days may be warm, the evenings cool down, making the traditional rush from house to house a pleasant, sweat-free affair—as long as you avoid heavy, multi-layered costumes.

Precipitation: A Truly Rare Treat

If you’re looking for a downpour to match the mood of a haunted house, you’ll almost certainly be disappointed in Phoenix. Rain on Halloween is an extremely rare event in the Valley of the Sun.

  • Infrequent Rain: Since records began in 1895, measurable rainfall has only been observed 9 times on Halloween day.

  • Last Occurrence: The most recent time Phoenix saw rain on Oct. 31 was nearly four decades ago, in 1987 (.13″)!

  • Wettest Halloween: Although rare, the rain can occasionally be substantial. The record for the wettest Halloween day was set in 1957 when 1.05 inches of rain fell.

The climatological odds are overwhelmingly in favor of clear, dry skies, ensuring that plans for outdoor festivities are almost never threatened by rain.

For anyone planning to celebrate All Hallows’ Eve in Phoenix, the forecast, based on over a century of data, is reliably simple: expect warmth, sunshine, and no need for an umbrella. Phoenix’s Halloween is a reliably dry, mild, and often hot desert holiday.