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
December is marked by a significant decrease, with the average high-temperature retreating from a frosty 44.2°F (6.8°C) in November to a freezing cold 29.3°F (-1.5°C). December brings Marcus a consistent average low-temperature of 18.1°F (-7.7°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Marcus, in December, it is raining for 3.5 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Marcus, there are 116.2 rainfall days, and 22.05" (560mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Marcus, in December, during 7.9 snowfall days, 1.97" (50mm) of snow is typically accumulated. Throughout the year, there are 38.2 snowfall days, and 14.76" (375mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:34 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 4:59 pm CST.
Sunshine
In December, the average sunshine is 4.6h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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?
What is the average length of the day in December in Marcus?
When are sunrise and sunset in December?
How many hours of sunshine does Marcus have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Marcus, IA
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Marcus, IA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Marcus, IA
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
Marcus, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Marcus, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Marcus, IA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (16.9 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in December
Marcus, IA
- Average snowfall in December: 1.97"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Marcus, IA
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marcus, IA
- Average daylight in December: 9h and 1min
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 4min
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 6min).
Average sunshine days in December
Marcus, IA
- Average sunshine days in December: 20.8 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Marcus, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Marcus, 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 July (Cloud cover 27).
Average visibility in December
Marcus, 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).
Marcus, Iowa, USA
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