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
The onset of December coincides with a reduction in the average high-temperature, falling from a chilly 47.1°F (8.4°C) in November to an icy 34.7°F (1.5°C). December brings Columbia a consistent average low-temperature of 23°F (-5°C).Humidity
In Columbia, the average relative humidity in December is 79%.Rainfall
The months with the least rainfall are February and December Rain falls for 5.5 days and accumulates 0.47" (12mm) of rain.Snowfall
January through May, October through December are months with snowfall. In Columbia, in December, snow falls for 6.4 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, there are 30.4 snowfall days, and 6.5" (165mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:19 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 4:53 pm CST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by 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?
What is the driest month?
How many days does it rain in December in Columbia?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Columbia have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Columbia have in December?
What is the UV index intensity in December?
Average temperature in December
Columbia, IA
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in December
Columbia, 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 (29.89"Hg).
Average wind speed in December
Columbia, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in December
Columbia, IA
- Average humidity in December: 79%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Columbia, IA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are February and December (0.47").
Average rainfall days in December
Columbia, IA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in December
Columbia, IA
- Average snowfall in December: 0.75"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Columbia, IA
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Columbia, IA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Columbia, IA
- Average sunshine days in December: 20.5 days
The months with the most sunshine days are November and December (20.5 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in December
Columbia, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Columbia, IA
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in December
Columbia, IA
- 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).
Columbia, Iowa, USA
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