Weather
Southwest Halloween 2026: Arizona–New Mexico Rain Chances Rise for Oct. 25–31
Phoenix, AZ – Halloween week could bring changing weather across the Southwest, with warmer conditions possible in some desert communities while cooler Pacific air and increased precipitation potentia
By Sophie Caldwell · 2026-10-18T08:26:58.040Z
Phoenix, AZ – Halloween week could bring changing weather across the Southwest, with warmer conditions possible in some desert communities while cooler Pacific air and increased precipitation potential affect areas farther west. Families planning celebrations Saturday, Oct. 31, may need to watch for rain rather than assume the region will remain dry.
According to the National Oceanic and Atmospheric Administration's Climate Prediction Center, its 8 14 day outlook issued Saturday, Oct. 17, shows varying temperature and precipitation probabilities across Arizona, New Mexico, Nevada and Southern California from Sunday, Oct. 25, through Saturday, Oct. 31.
A broad area of above normal temperatures extends across much of the central and eastern United States, while a cooler pattern is favored closer to portions of the Pacific Coast.
Will Halloween bring a cooldown?
For families in Phoenix, Tucson and Albuquerque, temperatures during Halloween week could remain relatively mild, with parts of the interior Southwest favoring above normal conditions.
Farther west, including portions of Southern California and Nevada, the temperature outlook becomes less favorable for unusual warmth as cooler Pacific weather influences the region.
However, the outlook does not establish specific temperatures for Halloween evening.
Could rain disrupt trick or treating?
NOAA's precipitation outlook favors above normal precipitation across portions of the western United States during Oct. 25 31.
Pacific weather systems could bring periods of rain to some Southwest communities, with mountain precipitation possible where temperatures are sufficiently cold.
The pattern raises questions about outdoor Halloween plans, particularly across areas closer to incoming Pacific moisture.
However, above normal precipitation probabilities do not guarantee rain Saturday evening, and the outlook does not identify specific storm arrival times.
For now, Southwest families face a more mixed Halloween week forecast than many areas farther east.
Residents should monitor updated forecasts closer to Oct. 31 for more reliable evening temperatures, rainfall chances and possible mountain travel impacts.