December weather forecastMammoth, AZ
December
Weather in December
December, the first month of the winter in Mammoth, is also a moderate month, with an average temperature varying between 58.1°F (14.5°C) and 39.9°F (4.4°C).Temperature
The coldest period is December, when temperatures fluctuate between an average high of 58.1°F (14.5°C) and a low of 39.9°F (4.4°C).Humidity
With an average relative humidity of 50%, December is the most humid month.Rainfall
In Mammoth, during December, the rain falls for 6.6 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, in Mammoth, there are 80.2 rainfall days, and 10.16" (258mm) of precipitation is accumulated.Snowfall
In Mammoth, snow does not fall in March through December.Daylight
The month with the shortest days in Mammoth is December, with an average of 10h and 0min of daylight.On the first day of December in Mammoth, sunrise is at 7:07 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:27 pm MST.
Sunshine
With an average of 6.9h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in Mammoth are November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 3 during December leads to these instructions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mammoth, AZ
- Average high temperature in December: 58.1°F
The warmest month (with the highest average high temperature) is June (93.9°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in December: 39.9°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in December
Mammoth, AZ
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Mammoth, AZ
- Average wind speed in December: 5.6mph
The windiest months (with the highest average wind speed) are April and May (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Mammoth, AZ
- Average humidity in December: 50%
The month with the highest relative humidity is December (50%).
The month with the lowest relative humidity is June (20%).
Average rainfall in December
Mammoth, AZ
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is July (1.97").
The driest months (with the least rainfall) are May and June (0.12").
Average rainfall days in December
Mammoth, AZ
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is May (2 days).
Average snowfall in December
Mammoth, AZ
- Average snowfall in December: 0"
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Mammoth, AZ
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Mammoth, AZ
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 54min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Mammoth, AZ
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (10 days).
Average UV index in December
Mammoth, AZ
- Average UV index in December: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Mammoth, AZ
- Average cloud cover in December: 21
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in December
Mammoth, AZ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
