December weather forecastNewcastle, UT
December
Weather in December
The first month of the winter, December, is still a cold month in Newcastle, Utah, with an average temperature varying between 36.5°F (2.5°C) and 20.8°F (-6.2°C).Temperature
Newcastle's December weather, with an average high temperature of 36.5°F (2.5°C) and an average low temperature of 20.8°F (-6.2°C), tends to be the coldest of the year.Humidity
The average relative humidity in December is 73%.Rainfall
In Newcastle, in December, it is raining for 5.6 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 84.2 rainfall days, and 9.21" (234mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 8.1 days and accumulates 4.25" (108mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:31 am and sunset at 5:15 pm. On the last day of December, sunrise is at 7:49 am and sunset at 5:25 pm MST.
Sunshine
In Newcastle, the average sunshine in December is 6.5h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the average maximum UV index of 1 translates into the following 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. To protect against the Sun's most potent rays, avoid direct exposure around midday. Boost your sun resistance with garments that are densely woven yet spacious. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Newcastle, UT
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (20.8°F).
Average pressure in December
Newcastle, UT
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Newcastle, UT
- Average wind speed in December: 6.4mph
The windiest month (with the highest average wind speed) is June (8.5mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).
Average humidity in December
Newcastle, UT
- Average humidity in December: 73%
The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is June (26%).
Average rainfall in December
Newcastle, UT
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is June (0.24").
Average rainfall days in December
Newcastle, UT
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is November (3.2 days).
Average snowfall in December
Newcastle, UT
- Average snowfall in December: 4.25"
The month with the highest snowfall is December (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Newcastle, UT
- Average snowfall days in December: 8.1 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Newcastle, UT
- Average daylight in December: 9h and 36min
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 30min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in December
Newcastle, UT
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is June (24 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in December
Newcastle, UT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Newcastle, UT
- Average cloud cover in December: 31
The month with the most cloud cover is December (Cloud cover 31).
The month with the least cloud cover is June (Cloud cover 8).
Average visibility in December
Newcastle, UT
- 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).
