December weather forecastColumbus Junction, IA
December
Weather in December
The first month of the winter, December, is also an icy month in Columbus Junction, Iowa, with an average temperature varying between 24.3°F (-4.3°C) and 35.4°F (1.9°C).Temperature
With the onset of December, Columbus Junction experiences a modest temperature adjustment, with the average high-temperature receding from a frosty 47.5°F (8.6°C) in November to a cold 35.4°F (1.9°C). In Columbus Junction, the expected average low-temperature for December is a subzero cold 24.3°F (-4.3°C).Humidity
In Columbus Junction, the average relative humidity in December is 80%.Rainfall
The months with the least rainfall in Columbus Junction, Iowa, are February and December Rain falls for 3.4 days and accumulates 0.28" (7mm) of rain.Snowfall
January through April, October through December are months with snowfall. In Columbus Junction, during December, snow falls for 3.7 days and regularly aggregates up to 0.12" (3mm) of snow. Throughout the year, in Columbus Junction, there are 20.4 snowfall days, and 3.11" (79mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December in Columbus Junction, Iowa, sunrise is at 7:12 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:46 pm CST.
Sunshine
In December, the average sunshine is 4.7h.UV index
The months with the lowest UV index in Columbus Junction, Iowa, are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Columbus Junction, IA
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Columbus Junction, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Columbus Junction, IA
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Columbus Junction, IA
- Average humidity in December: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Columbus Junction, IA
- Average rainfall in December: 0.28"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are February and December (0.28").
Average rainfall days in December
Columbus Junction, IA
- Average rainfall days in December: 3.4 days
The month with the highest number of rainy days is June (11 days).
The month with the least rainy days is January (3 days).
Average snowfall in December
Columbus Junction, IA
- Average snowfall in December: 0.12"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Columbus Junction, IA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (6.7 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
Columbus Junction, IA
- Average daylight in December: 9h and 18min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in December
Columbus Junction, IA
- Average sunshine days in December: 25.3 days
The month with the most sunshine days is December (25.3 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in December
Columbus Junction, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Columbus Junction, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Columbus Junction, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
