Flagstaff Weather in December: Temperature, Precipitation, Wind
Flagstaff, Arizona experiences a cold and dry climate in December, characterized by chilly temperatures and occasional snowfall. The average temperature hovers around 0.9°C (33.5°F), with daytime highs reaching 8.9°C (48.0°F) and nighttime lows dipping to -5.8°C (21.5°F). Wind chill effects make the air feel even colder, with an average perceived temperature of -0.6°C (30.9°F).
Precipitation is relatively light during December in Flagstaff, with an average of 0.48 inches (12.2 mm) falling over the course of the month. Snow is the predominant form of precipitation, accumulating to an average depth of 0.04 inches (1 mm). The probability of precipitation on any given day is 19.4%, with approximately 5 days experiencing measurable rainfall or snowfall.
Wind plays a significant role in Flagstaff’s December weather. Average wind speeds reach 19.7 mph (31.7 km/h), with gusts up to 39.8 mph (64.1 km/h). These strong winds contribute to the chilly feel of the air and can create challenging conditions for outdoor activities.
Cloud cover is minimal in December, averaging only 18% throughout the month. Clear skies dominate, allowing for excellent visibility of 15.6 miles (25.1 km) on average. The UV index remains moderate at 3.5, indicating some risk of sun exposure despite the cooler temperatures.
Visitors to popular Flagstaff attractions like the Lowell Observatory or the Arizona Snowbowl ski resort should prepare for cold conditions. Warm layers are essential, especially during early morning hours when temperatures are at their lowest. The sun rises around 7:27 AM and sets at approximately 5:17 PM, providing about 9 hours and 50 minutes of daylight.
Atmospheric pressure in Flagstaff during December averages 1021.0 hPa, indicating stable weather conditions. The relative humidity averages 55.9%, contributing to the crisp, dry feel of the winter air in this high-altitude city.
What is the temperature in Flagstaff in December?
Average air temperature in Flagstaff is 0.9°C (33.5°F) in December. The outside temperature in Flagstaff feels like -0.6°C (30.9°F) on a typical December day. The highest average temperature during sunny days is 8.9°C (48°F) and feels like 7.5°C (45.6°F). The lowest average temperature after dark is -5.8°C (21.5°F) which feels like -7.4°C (18.6°F).
How hot is Flagstaff in December?
The hot temperature in December in Flagstaff rises to 14.4°C (57.9°F) on sunny days with low cloud coverage and 55.9% humidity. During hottest days of December it feels like 14.4 °C (57.9°F). The average maximum temp in Flagstaff is 8.9°C (57.9°F) during day time in December.
How cold is Flagstaff in December?
The coldest temp in Flagstaff in December drops to -11.8°C (10.8°F) during the cold nights. With 19.7km/h (12.3mph) winds and 55.9% humidity it feels like -15.5°C (4.1°F) on the coldest nights. The average minimum temperature is -5.8°C (21.5°F) during night time in December.
Does it rain in Flagstaff in December?
Yes, it rains for 5 days in Flagstaff, United States in December averaging 0.48 mm of precipitation. Flagstaff has a 19.4% chance for rain throughout the entire month of December.
How much does it rain in Flagstaff throughout December?
Flagstaff has 0.48 mm (0.02 inch) of rain per day on average in December. It rains for an average of 5 days out of the entire month.
Does it snow in Flagstaff in December?
Yes, it snows in Flagstaff during December. The average snowfall is 0.1 cm (0.04 inch) per day. And there is 0.04 cm (0.01 inch) of snow on the ground.
Is Flagstaff windy in December?
The average speed of wind in Flagstaff, United States during December is 19.7km/h (12.3mph) and average windgust is 39.8km/h (24.8mph). On some days in December wind can reach up to 31.8km/h (19.8mph).
What is the direction of the wind in Flagstaff in December?
Most days of December the wind is blowing from South-Southeast direction in Flagstaff.
What are the humidity levels in Flagstaff in December?
The average humidity levels in Flagstaff in December are 55.9%. Daily humidity levels in Flagstaff range from 34.9% to 90.8% during December.
How many hours of daylight are in Flagstaff in December?
Flagstaff has 9 hours 49 minutes of daylight in December on average. Sunset and sunrise times gradually change throughout the month. Sunrise in Flagstaff in December is at 7:27:31 and the sunset is at 17:17:16.
What is the cloud coverage in Flagstaff in December?
Clouds cover 18% of the sky on average throughout December in Flagstaff. The cloud coverage ranges from 0% to 95.5% depending on the day of the month.
What is the UV level in December in Flagstaff?
The average UV index in Flagstaff is 3.5 in December. UV levels change throughout the month and range from 1 to 6.
What is the solar radiation in Flagstaff in December?
The average solar radiation is 43.1 W/m2 (Watts per square meter) in Flagstaff during December. However solar radiation levels change throughout the month and range from 15.3 W/m2 to 79.5 W/m2.
What is the solar energy during December in Flagstaff?
The average solar energy during December in Flagstaff is 3.7 MJ/m2 (megajoules per square metre). Solar energy ranges from 1.2 MJ/m2, to 6.8 MJ/m2 during December.
Are there severe weather risks in Flagstaff in December?
Yes, there is a 10% risk for severe weather in Flagstaff, United States in December.
What is the air pressure in Flagstaff in December?
On average the air pressure in Flagstaff in December is 1021 mb (millibars). Throughout the month the sea level pressure ranges from 1011.9 mb to 1028.8 mb.
What is the visibility in Flagstaff in December?
The average daylight visibility in Flagstaff in December is 15.6 km (9.7 miles). Depending on the precipitation the visibility ranges from 9.2 km (5.7 miles) to 16 km (9.9 miles) throughout December.
What is the dew point in Flagstaff in December?
The average dew point in Flagstaff during December is -8.3°C (17°F).
Where is the data for Flagstaff climate in December coming from?
The climate data for Flagstaff, Arizona, United States in December is collected from the following weather stations.
- FLAGSTAFF PULLIAM AIRPORT, AZ US
- SEDONA AIRPORT, AZ US
- FLAGSTAFF, AZ US
- N7CEE Flagstaff AZ US
- KCMR
- KFLG
- KSEZ
- FLAGSTAFF AZ US