easeweather.com

Weather in Flagstaff, Arizona for December 2025

Your guide to Flagstaff weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 4 snowy days, Flagstaff usually enjoys a light touch of snow in December.
    According to Flagstaff snow forecast for December 2025, no snow is expected in the next 2 weeks.

  • Temperatures

  • Until now, December 2025 in Flagstaff has been nearly identical to the historical average, with a temperature of 9.6 °F (showing only a slight deviation of 0.4 °F).

  • The forecast for the coming days of December 2025 predicts a temperature of 13.7 °F , which is warmer than usual.

  • In general, the average temperature in Flagstaff at the beginning of December is 8.7 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 10.4 °F by the end of December.

  • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
27
Dry days
Average rainy days
0
Rainy days
Average snowy days
4
Snow days
Average temperatures
8°/0°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
46 %
Avg humidity

Flagstaff Weather December

Move between months or click on a day

Temperatures trend during December in Flagstaff

See the weather trend as well as the moving average line

December weather in Flagstaff day by day

Click on a date for more information
Date Weather Temperatures Rain UV More
Dec. 1 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
5° /-1° 0.4 mm 2
Dec. 2 Overcast
Overcast
8° /-2° 0 mm 2
Dec. 3 Sunny
Sunny
8° /-1° 2.6 mm 3
Dec. 4 Partly cloudy
Partly cloudy
8° /0° 0 mm 3
Dec. 5 Sunny
Sunny
10° /0° 0 mm 3
Dec. 6 Sunny
Sunny
12° /1° 0 mm 4
Dec. 7 Sunny
Sunny
10° /1° 0 mm 4
Dec. 8 Sunny
Sunny
9° /0° 0 mm 3
Dec. 9 Sunny
Sunny
8° /-3° 0 mm 3
Dec. 10 Sunny
Sunny
9° /-2° 0 mm 3
Dec. 11 Overcast
Overcast
13° /1° 0 mm 4
Dec. 12 Partly cloudy
Partly cloudy
10° /2° 0 mm 4
Dec. 13 Partly cloudy
Partly cloudy
10° /1° 0 mm 3
Dec. 14 Overcast
Overcast
15° /5° 0 mm 0.6
Dec. 15 Partly cloudy
Partly cloudy
16° /7° 0 mm 0.6
Dec. 16 Sunny
Sunny
15° /6° 0 mm 0.7
Dec. 17 Sunny
Sunny
16° /6° 0 mm 0.7
Dec. 18 Sunny
Sunny
16° /6° 0 mm 0.6
Dec. 19 Sunny
Sunny
14° /6° 0 mm 0
Dec. 20 Sunny
Sunny
10° /3° 0 mm 3
Dec. 21 Sunny
Sunny
11° /2° 0 mm 3
Dec. 22 Sunny
Sunny
13° /4° 0 mm 3
Dec. 23 Sunny
Sunny
14° /4° 0 mm 3
Dec. 24 Partly cloudy
Partly cloudy
12° /6° 0 mm 3
Dec. 25 Sunny
Sunny
14° /5° 0 mm 3
Dec. 26 Sunny
Sunny
14° /5° 0 mm 3
Dec. 27 Sunny
Sunny
12° /3° 0 mm 3
Dec. 28 Partly cloudy
Partly cloudy
9° /0° 0 mm 3
Dec. 29 Overcast
Overcast
11° /2° 0 mm 3
Dec. 30 Overcast
Overcast
9° /0° 0 mm 3
Dec. 31 Light snow
Light snow
4° /-2° 0.1 mm 2
Next
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.

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.

December rainfall patterns in Flagstaff

Explore the daily rainfall trends and prepare for Flagstaffs December weather 💧

Quick links

More Flagstaff weather pages
Location coordinates Where is Flagstaff?

Get accurate weather forecasts for Flagstaff, located at latitude 35.198 and longitude -111.651. Stay updated with localized weather information tailored for Flagstaff.

Found a mistake?
We appreciate your attention to details. Tell us here.