December weather forecastGreenwich, UT
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Greenwich, Utah, with an average temperature ranging between min 14°F (-10°C) and max 30.4°F (-0.9°C).Temperature
Start of December brings a shift in the average high-temperature, falling from November's wintry 41.4°F (5.2°C) to a freezing cold 30.4°F (-0.9°C). Greenwich records an average temperature drop to 14°F (-10°C) in December.Humidity
The average relative humidity in December in Greenwich is 77%.Rainfall
In December, the rain falls for 2.9 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, in Greenwich, there are 71.2 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Snowfall
Months with snowfall in Greenwich are January through June, September through December. In Greenwich, during December, snow falls for 11.1 days and regularly aggregates up to 5.98" (152mm) of snow. In Greenwich, during the entire year, snow falls for 64.4 days and aggregates up to 44.17" (1122mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:26 am and sunset at 5:07 pm. On the last day of December, in Greenwich, Utah, sunrise is at 7:44 am and sunset at 5:17 pm MST.
Sunshine
In December, the average sunshine in Greenwich is 6.1h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Experience reduced UV exposure by about half when donning a wide-brim hat. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Greenwich, UT
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 14°F
The month with the highest average low temperature is July (55°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Greenwich, UT
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Greenwich, UT
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in December
Greenwich, UT
- Average humidity in December: 77%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is June (32%).
Average rainfall in December
Greenwich, UT
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (1.26").
The driest month (with the least rainfall) is June (0.43").
Average rainfall days in December
Greenwich, UT
- Average rainfall days in December: 2.9 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in December
Greenwich, UT
- Average snowfall in December: 5.98"
The month with the highest snowfall is March (8.07").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Greenwich, UT
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is December (11.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Greenwich, UT
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in December
Greenwich, UT
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Greenwich, UT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Greenwich, UT
- Average cloud cover in December: 36
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 12).
Average visibility in December
Greenwich, 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).
