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United States weather

Weather in Flagstaff, Arizona for December 2026

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.

    • Temperatures

  • In general, the average temperature in Flagstaff at the beginning of December is 8.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 6.4 °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
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate or heavy snow with thunder
5°
2
Overcast
8°
3
Sunny
8°
4
Partly cloudy
8°
5
Sunny
10°
6
Sunny
12°
7
Sunny
10°
8
Sunny
9°
9
Sunny
8°
10
Sunny
9°
11
Overcast
13°
12
Partly cloudy
10°
13
Partly cloudy
10°
14
Overcast
9°
15
Partly cloudy
11°
16
Sunny
12°
17
Sunny
14°
18
Sunny
12°
19
Sunny
11°
20
Partly cloudy
11°
21
Partly cloudy
11°
22
Moderate or heavy snow showers
10°
23
Overcast
9°
24
Mist
7°
25
Sunny
6°
26
Overcast
6°
27
Overcast
6°
28
Partly cloudy
6°
29
Sunny
8°
30
Overcast
8°
31
Overcast
5°

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
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Moderate or heavy snow with thunder
Moderate or heavy snow with thunder
 5° /-1° 0.4 mm 0.3 cm
Dec. 2 Overcast
Overcast
 8° /-2° 0 mm 0 cm
Dec. 3 Sunny
Sunny
 8° /-1° 2.6 mm 1.1 cm
Dec. 4 Partly cloudy
Partly cloudy
 8° /0° 0 mm 0 cm
Dec. 5 Sunny
Sunny
 10° /0° 0 mm 0 cm
Dec. 6 Sunny
Sunny
 12° /1° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 10° /1° 0 mm 0 cm
Dec. 8 Sunny
Sunny
 9° /0° 0 mm 0 cm
Dec. 9 Sunny
Sunny
 8° /-3° 0 mm 0 cm
Dec. 10 Sunny
Sunny
 9° /-2° 0 mm 0 cm
Dec. 11 Overcast
Overcast
 13° /1° 0 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 10° /2° 0 mm 0 cm
Dec. 13 Partly cloudy
Partly cloudy
 10° /1° 0 mm 0 cm
Dec. 14 Overcast
Overcast
 9° /1° 0 mm 0 cm
Dec. 15 Partly cloudy
Partly cloudy
 11° /1° 0 mm 0 cm
Dec. 16 Sunny
Sunny
 12° /1° 0 mm 0 cm
Dec. 17 Sunny
Sunny
 14° /4° 0 mm 0 cm
Dec. 18 Sunny
Sunny
 12° /2° 0 mm 0 cm
Dec. 19 Sunny
Sunny
 11° /3° 0 mm 0 cm
Dec. 20 Partly cloudy
Partly cloudy
 11° /3° 0 mm 0 cm
Dec. 21 Partly cloudy
Partly cloudy
 11° /3° 0 mm 0 cm
Dec. 22 Moderate or heavy snow showers
Moderate or heavy snow showers
 10° /4° 0.9 mm 0.4 cm
Dec. 23 Overcast
Overcast
 9° /2° 2.5 mm 1.8 cm
Dec. 24 Mist
Mist
 7° /0° 40.4 mm 0 cm
Dec. 25 Sunny
Sunny
 6° /-1° 19 mm 3.3 cm
Dec. 26 Overcast
Overcast
 6° /-1° 0 mm 0 cm
Dec. 27 Overcast
Overcast
 6° /-1° 0 mm 0 cm
Dec. 28 Partly cloudy
Partly cloudy
 6° /-2° 0 mm 0 cm
Dec. 29 Sunny
Sunny
 8° /0° 0 mm 0 cm
Dec. 30 Overcast
Overcast
 8° /0° 0 mm 0 cm
Dec. 31 Overcast
Overcast
 5° /-1° 0.1 mm 0 cm
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.
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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 2026?

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 2026

Track daily snowfall levels and discover Flagstaff’s snowy potential this December ❄️
On average, Flagstaff sees 4 snowy days during December, with approximately 8.7 cm of total snowfall.

December rainfall patterns in Flagstaff

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

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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.

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