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
A decrease in the average high-temperature marks December, falling from November's icy 42.3°F (5.7°C) to a subzero cold 26.8°F (-2.9°C). Sibley usually reports an average low-temperature of 15.8°F (-9°C) during the month of December.Humidity
The average relative humidity in December in Sibley is 85%.Rainfall
In Sibley, in December, it is raining for 4.9 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 122.3 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
Months with snowfall in Sibley are January through May, October through December. In December, it is snowing for 11.1 days. Throughout December, 3.46" (88mm) of snow is accumulated. Throughout the year, there are 51.6 snowfall days, and 19.69" (500mm) of snow is accumulated.Daylight
December has the shortest days of the year in Sibley, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:55 am and sunset at 4:57 pm CST.
Sunshine
In Sibley, Iowa, the average sunshine in December is 4.3h.UV index
In Sibley, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 2 in December transforms into this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. 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 Sibley in December?
What is the average humidity in December in Sibley?
How many days does it rain in December in Sibley?
How many days does it snow in December in Sibley?
What is the month with the shortest days in Sibley?
How many hours of daylight does Sibley have in December?
When is the sunrise / sunset in December in Sibley?
How long on average sun shines in December in Sibley?
What is the UV index intensity in December in Sibley?
Average temperature in December
Sibley, IA
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in December
Sibley, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Sibley, IA
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in December
Sibley, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Sibley, IA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Sibley, IA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in December
Sibley, IA
- Average snowfall in December: 3.46"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sibley, IA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sibley, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Sibley, IA
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in December
Sibley, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Sibley, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Sibley, IA
- 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).
Sibley, Iowa, USA
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