Arizona Weather In December 2025. We show the december climate in arizona by comparing the average december weather in 3 representative places: Get the monthly weather forecast for phoenix, az, including daily high/low, historical averages, to help you plan ahead.
Typical temperatures at cities, towns, national parks and monuments in arizona during the month of december are listed below. Get the monthly weather forecast for phoenix, az, including daily high/low, historical averages, to help you plan ahead.
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