Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
As November transitions to December, the average high-temperature falls from a chilly 47.5°F (8.6°C) to an icy 35.2°F (1.8°C). In December, the nighttime temperature lowers to an average of 20.8°F (-6.2°C).Humidity
In Monticello, the average relative humidity in December is 69%.Rainfall
In Monticello, in December, during 5 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, in Monticello, there are 94.8 rainfall days, and 12.72" (323mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. December is the month with the most snowfall. Snow falls for 10.3 days and accumulates 8.62" (219mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 4:58 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:08 pm MST.
Sunshine
In Monticello, the average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
When does it snow the most in Monticello?
How many days does it snow in December in Monticello?
What is the month with the shortest days?
What is the average length of the day in December in Monticello?
When is the sunrise / sunset in December?
How many hours of sunshine does Monticello have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Monticello, UT
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in December
Monticello, UT
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Monticello, UT
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity in December
Monticello, UT
- Average humidity in December: 69%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is June (25%).
Average rainfall in December
Monticello, UT
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is June (0.59").
Average rainfall days in December
Monticello, UT
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is November (2.9 days).
Average snowfall in December
Monticello, UT
- Average snowfall in December: 8.62"
The month with the highest snowfall is December (8.62").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Monticello, UT
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is December (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Monticello, UT
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in December
Monticello, UT
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in December
Monticello, UT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Monticello, UT
- Average cloud cover in December: 29
The month with the most cloud cover is December (Cloud cover 29).
The month with the least cloud cover is June (Cloud cover 11).
Average visibility in December
Monticello, UT
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Monticello, Utah, USA
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