Flagstaff (AZ)
December
Weather in Flagstaff, Arizona for December 2025
Your guide to Flagstaff weather in December - trends and predictions
With an average of 4 snowy days, Flagstaff usually enjoys a light touch of snow in December.
In general, the average temperature in Flagstaff at the beginning of December is 9.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 7.6 °F by the end of December.
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Snow Forecast ❄️
Temperatures
More
27
Dry days
0
Rainy days
4
Snow days
8°/0°
Temperatures
15 km/h
Avg max wind
46 %
Avg humidity
Flagstaff Weather December
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Temperatures trend during December in Flagstaff
See the weather trend as well as the moving average line
December weather in Flagstaff day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Moderate or heavy snow with thunder | 5° /0° | 0.6 mm | 0.5 cm | |
| Dec. 2 |  Overcast | 8° /-2° | 0 mm | 0 cm | |
| Dec. 3 |  Sunny | 11° /-1° | 0 mm | 0 cm | |
| Dec. 4 |  Partly cloudy | 10° /2° | 0 mm | 0 cm | |
| Dec. 5 |  Cloudy | 10° /1° | 0 mm | 0 cm | |
| Dec. 6 | Partly cloudy | 12° /1° | 0 mm | 0 cm | |
| Dec. 7 | Partly cloudy | 10° /1° | 0 mm | 0 cm | |
| Dec. 8 | Sunny | 8° /-2° | 0 mm | 0 cm | |
| Dec. 9 | Sunny | 5° /-5° | 0 mm | 0 cm | |
| Dec. 10 | Sunny | 7° /-5° | 0 mm | 0 cm | |
| Dec. 11 | Overcast | 11° /-1° | 0 mm | 0 cm | |
| Dec. 12 | Partly cloudy | 7° /0° | 0 mm | 0 cm | |
| Dec. 13 | Partly cloudy | 6° /-2° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 7° /-1° | 0 mm | 0 cm | |
| Dec. 15 | Partly cloudy | 9° /-1° | 0 mm | 0 cm | |
| Dec. 16 | Sunny | 10° /-1° | 0 mm | 0 cm | |
| Dec. 17 | Sunny | 13° /3° | 0 mm | 0 cm | |
| Dec. 18 | Overcast | 11° /1° | 0 mm | 0 cm | |
| Dec. 19 | Sunny | 10° /2° | 0 mm | 0 cm | |
| Dec. 20 | Sunny | 12° /3° | 0 mm | 0 cm | |
| Dec. 21 | Partly cloudy | 11° /3° | 0 mm | 0 cm | |
| Dec. 22 |  Moderate or heavy snow showers | 8° /3° | 1.3 mm | 0.5 cm | |
| Dec. 23 | Moderate or heavy snow with thunder | 8° /1° | 3.7 mm | 2.7 cm | |
| Dec. 24 |  Mist | 7° /-1° | 0 mm | 0 cm | |
| Dec. 25 | Sunny | 6° /-3° | 7.2 mm | 5 cm | |
| Dec. 26 | Overcast | 6° /-2° | 0 mm | 0 cm | |
| Dec. 27 | Overcast | 8° /-1° | 0 mm | 0 cm | |
| Dec. 28 | Partly cloudy | 9° /0° | 0 mm | 0 cm | |
| Dec. 29 | Overcast | 11° /2° | 0 mm | 0 cm | |
| Dec. 30 | Overcast | 9° /0° | 0 mm | 0 cm | |
| Dec. 31 |  Light snow | 4° /-2° | 0.1 mm | 0 cm | |
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Important Notice
Our weather forecast for Flagstaff in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Flagstaff forecast closer to your planned date for the most up-to-date weather information.
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Flagstaff in December - FAQ
What are the expected maximum and minimum temperatures in Flagstaff during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 0°.
How much rainfall should be expected in Flagstaff during December?
Expect minimal rainfall in Flagstaff during December, with a total of 13 mm over approximately 0 days. This minimal precipitation is unlikely to significantly impact plans.
Will it snow in Flagstaff in December 2025?
Flagstaff experiences an average snowfall of 8.705 cm during December, occurring over 4 days.
What are the typical wind conditions in Flagstaff during December?
The average wind speed in Flagstaff during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
Flagstaff snow forecast December 2025
Track daily snowfall levels and discover Flagstaff’s snowy potential this December ❄️
December rainfall patterns in Flagstaff
Explore the daily rainfall trends and prepare for Flagstaffs December weather 💧
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