December weather forecastHerriman, UT
December
Weather in December
In December, Herriman becomes a picturesque winter wonderland. December brings the chill back into the city with temperatures dipping significantly from November. The snowfall increases compared to the previous month, accumulating up to 3.98" (101mm). The city's landscapes get blanketed in the wintry snow, marking the full arrival of winter, and citizens brace themselves for the icy cold days of the soon to arrive January.Temperature
The transition into December indicates a reduction in the average high-temperature, down to an icy 33.8°F (1°C) from November's frosty 46.2°F (7.9°C). The nights of December anticipate an average low-temperature of 20.5°F (-6.4°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Herriman, during December, the rain falls for 6.6 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 86.1 rainfall days, and 6.61" (168mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 9.8 days and typically aggregates up to 3.98" (101mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 5:01 pm. On the last day of December, sunrise is at 7:51 am and sunset at 5:11 pm MST.
Sunshine
The average sunshine in December is 5.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Herriman, UT
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Herriman, 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
Herriman, UT
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is March (6.8mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).
Average humidity in December
Herriman, UT
- Average humidity in December: 79%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (35%).
Average rainfall in December
Herriman, UT
- Average rainfall in December: 0.63"
The wettest months (with the highest rainfall) are March and April (0.71").
The driest month (with the least rainfall) is June (0.28").
Average rainfall days in December
Herriman, UT
- Average rainfall days in December: 6.6 days
The months with the highest number of rainy days are March and April (9.8 days).
The month with the least rainy days is November (5.2 days).
Average snowfall in December
Herriman, UT
- Average snowfall in December: 3.98"
The month with the highest snowfall is December (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Herriman, UT
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Herriman, UT
- Average daylight in December: 9h and 18min
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 48min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Herriman, UT
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is June (23.1 days).
The months with the least sunshine days are February and April (16.3 days).
Average UV index in December
Herriman, 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
Herriman, UT
- Average cloud cover in December: 39
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Herriman, UT
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (4mi).
