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
Onset of December witnesses a reduction in the average high-temperature, falling from a chilly 44.1°F (6.7°C) in November to a cold 32°F (0°C). Mount Olympus experiences a consistent average temperature of 18.5°F (-7.5°C) throughout the nights in December.Humidity
The average relative humidity in December is 80%.Rainfall
In Mount Olympus, in December, it is raining for 11 days, with typically 2.2" (56mm) of accumulated precipitation. In Mount Olympus, during the entire year, the rain falls for 120.5 days and collects up to 18.66" (474mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 13 days. Throughout December, 12.52" (318mm) of snow is accumulated. Throughout the year, there are 62.9 snowfall days, and 59.69" (1516mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:32 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:10 pm MST.
Sunshine
In December, the average sunshine is 5.8h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Mount Olympus?
What is the average humidity in December?
How many days does it rain in December in Mount Olympus?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Mount Olympus, UT
- Average high temperature in December: 32°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Mount Olympus, UT
- Average pressure in December: 30.22"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Mount Olympus, UT
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is January (4.7mph).
Average humidity in December
Mount Olympus, UT
- Average humidity in December: 80%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (38%).
Average rainfall in December
Mount Olympus, UT
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is February (2.4").
The driest month (with the least rainfall) is June (0.67").
Average rainfall days in December
Mount Olympus, UT
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is April (13.9 days).
The month with the least rainy days is June (6.9 days).
Average snowfall in December
Mount Olympus, UT
- Average snowfall in December: 12.52"
The month with the highest snowfall is January (14.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Olympus, UT
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Olympus, UT
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Mount Olympus, UT
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is June (20.8 days).
The month with the least sunshine days is February (10.5 days).
Average UV index in December
Mount Olympus, UT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mount Olympus, UT
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Mount Olympus, UT
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mount Olympus, Utah, USA
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