December weather forecastMarble Rock, IA
December
Weather in December
December, the first month of the winter in Marble Rock, is also a subzero cold month, with an average temperature varying between 18°F (-7.8°C) and 28.4°F (-2°C).Temperature
As Marble Rock transitions into December, a marked decrease in the average high-temperature is observed, dropping from a frosty 42.8°F (6°C) in November to a subzero cold 28.4°F (-2°C). In Marble Rock, the average nighttime temperature during December is 18°F (-7.8°C).Humidity
In December, the average relative humidity in Marble Rock, Iowa, is 85%.Rainfall
In Marble Rock, during December, the rain falls for 5.5 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Marble Rock, during the entire year, the rain falls for 129.5 days and collects up to 25.98" (660mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Marble Rock. In Marble Rock, during December, snow falls for 11.7 days and regularly aggregates up to 3.35" (85mm) of snow. Throughout the year, in Marble Rock, there are 50.1 snowfall days, and 21.69" (551mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:23 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:42 am and sunset at 4:47 pm CST.
Sunshine
In December, the average sunshine is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 1 during December translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Marble Rock, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in December
Marble Rock, IA
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Marble Rock, IA
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in December
Marble Rock, 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 (71%).
Average rainfall in December
Marble Rock, IA
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Marble Rock, IA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Marble Rock, IA
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Marble Rock, IA
- Average snowfall days in December: 11.7 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marble Rock, IA
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Marble Rock, IA
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in December
Marble Rock, 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
Marble Rock, IA
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Marble Rock, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
