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
Witnessing a clear downswing, the average high-temperature during December drops from November's frosty 43.7°F (6.5°C) to a subzero cold 28.9°F (-1.7°C). The average low-temperature during December nights is 18.5°F (-7.5°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Mallard, during December, the rain falls for 4.5 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Mallard, during the entire year, the rain falls for 127.3 days and collects up to 23.58" (599mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 10.5 days. Throughout December, 2.72" (69mm) of snow is accumulated. In Mallard, during the entire year, snow falls for 46.1 days and aggregates up to 19.06" (484mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:30 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:54 pm CST.
Sunshine
The average sunshine in December is 4.6h.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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?
When are sunrise and sunset in December?
How many hours of sunshine does Mallard have in December?
What is the UV index reading in December in Mallard?
Average temperature in December
Mallard, IA
- Average high temperature in December: 28.9°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 (24.3°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Mallard, 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 (29.88"Hg).
Average wind speed in December
Mallard, IA
- Average wind speed in December: 10.6mph
The windiest months (with the highest average wind speed) are January and April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Mallard, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in December
Mallard, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Mallard, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (18.3 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in December
Mallard, IA
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mallard, IA
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mallard, 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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Mallard, IA
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in December
Mallard, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Mallard, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Mallard, 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).
Mallard, Iowa, USA
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