Southwest U.S. Long Range Weather Forecast for December 14th 2025 to January 13th 2026
Includes Arizona, California, Nevada, Utah
December 2025
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12Milder under threatening skies.
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16Colder weather moves in.
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20Some rain and (over mountains) snow, then clearing.
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24Fair, then very unsettled.
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28Clearing as we close the books on 2025.
January 2026
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1Cool but dry for New Year’s Day.
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4Mild, rainy in coastal CA.
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8Cold, snow in northern AZ, UT.
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12Clear but chilly.
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