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 frosty 47.7°F (8.7°C) in November to a cold 34.7°F (1.5°C). During the month of December, an average temperature of 22.8°F (-5.1°C) is noted during the nights.Humidity
The average relative humidity in December is 74%.Rainfall
In Callao, in December, it is raining for 8.9 days, with typically 0.79" (20mm) of accumulated precipitation. In Callao, during the entire year, the rain falls for 108.8 days and collects up to 9.88" (251mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 10.2 days. Throughout December, 4.33" (110mm) of snow is accumulated. Throughout the year, there are 38.9 snowfall days, and 17.52" (445mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:37 am and sunset at 5:10 pm. On the last day of December, sunrise is at 7:56 am and sunset at 5:20 pm MST.
Sunshine
The average sunshine in December is 6.3h.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 reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Callao have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Callao, UT
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Callao, UT
- Average pressure in December: 30.21"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
Callao, UT
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).
Average humidity in December
Callao, UT
- Average humidity in December: 74%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (26%).
Average rainfall in December
Callao, UT
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is April (1.18").
The driest month (with the least rainfall) is June (0.51").
Average rainfall days in December
Callao, UT
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is April (11.9 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in December
Callao, UT
- Average snowfall in December: 4.33"
The month with the highest snowfall is January (4.45").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Callao, UT
- Average snowfall days in December: 10.2 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Callao, 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 24min).
- Average sunshine in December: 6h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in December
Callao, UT
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in December
Callao, UT
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Callao, UT
- Average cloud cover in December: 33
The months with the most cloud cover are January, February and December (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Callao, 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).
Callao, Utah, USA
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