December weather forecastMount Ayr, IA
December
Weather in December
The first month of the winter, December, is also an icy month in Mount Ayr, Iowa, with an average temperature fluctuating between 35.2°F (1.8°C) and 23.2°F (-4.9°C).Temperature
A moderate decline in the average high-temperature is seen during December, decreasing from a frosty 48.4°F (9.1°C) in November to a wintry 35.2°F (1.8°C). In December, Mount Ayr experiences an average nighttime temperature of 23.2°F (-4.9°C).Humidity
The average relative humidity in December is 78%.Rainfall
The months with the least rainfall in Mount Ayr, Iowa, are February and December Rain falls for 5.4 days and accumulates 0.71" (18mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Mount Ayr, in December, during 5.8 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Mount Ayr, during the entire year, snow falls for 28.7 days and aggregates up to 11.85" (301mm) of snow.Daylight
December has the shortest days of the year in Mount Ayr, with an average of 9h and 18min of daylight.On the first day of December in Mount Ayr, sunrise is at 7:22 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:59 pm CST.
Sunshine
The average sunshine in December in Mount Ayr is 5h.UV index
In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. 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
Average temperature in December
Mount Ayr, IA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Mount Ayr, 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 (29.88"Hg).
Average wind speed in December
Mount Ayr, IA
- Average wind speed in December: 9.9mph
The windiest months (with the highest average wind speed) are January, February and March (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Mount Ayr, IA
- Average humidity in December: 78%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Mount Ayr, IA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (3.86").
The driest months (with the least rainfall) are February and December (0.71").
Average rainfall days in December
Mount Ayr, IA
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Mount Ayr, IA
- Average snowfall in December: 1.42"
The month with the highest snowfall is January (3.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Ayr, IA
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Ayr, IA
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 0min
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 36min).
Average sunshine days in December
Mount Ayr, IA
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in December
Mount Ayr, 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
Mount Ayr, IA
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Mount Ayr, 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).
