Weather
Southwest Halloween Outlook: Fall Heat May Stick Around Oct. 20-26
Phoenix, AZ – The Southwest could see a mixed late October weather pattern as Halloween approaches, with temperatures varying across Arizona, New Mexico, Nevada and neighboring areas during October 20
By Rachel Monroe · 2026-10-13T10:04:17.146Z
Phoenix, AZ – The Southwest could see a mixed late October weather pattern as Halloween approaches, with temperatures varying across Arizona, New Mexico, Nevada and neighboring areas during October 20 26.
While warmer than normal conditions are favored across large portions of the central and eastern United States, the Southwest sits closer to a transition zone where the temperature outlook is less uniform.
According to NOAA's Climate Prediction Center, the 8 14 day temperature outlook issued Monday, October 12, shows contrasting temperature probabilities across the western United States.
The forecast suggests that residents should not expect the same widespread warm signal affecting the Midwest and Ohio Valley to extend equally across the entire Southwest.
A Different Pattern Across the Desert Southwest For communities including Phoenix, Tucson, Las Vegas and Albuquerque, the extended outlook highlights the importance of location when evaluating late October temperature trends.
Some areas may experience warmer than average conditions, while others have weaker temperature signals or greater uncertainty.
The precipitation outlook also varies across the region, meaning the forecast does not support a blanket prediction of widespread rainfall.
NOAA's probability maps describe whether temperatures and precipitation are more likely to finish above, near or below historical averages. They do not provide specific daily highs, rainfall totals or storm arrival times.
What About Halloween Weekend? Looking beyond October 26, NOAA's Week 3 4 temperature outlook, valid October 24 through November 6, favors above normal temperatures across much of the western United States.
That broader signal raises the possibility of a mild finish to October in portions of the Southwest.
However, Halloween falls on Saturday, October 31, and the longer range forecast cannot yet establish exact holiday temperatures or rainfall chances.
For now, residents should watch the evolving October 20 26 forecast closely, particularly as shorter range updates begin identifying more specific temperature trends and precipitation opportunities.