December weather forecastAthelstan, IA
December
Weather in December
December, the first month of the winter in Athelstan, is also an icy month, with an average temperature fluctuating between 35.2°F (1.8°C) and 22.8°F (-5.1°C).Temperature
With December's arrival, Athelstan's weather changes as the average high-temperature falls from a chilly 48.6°F (9.2°C) in November to an icy 35.2°F (1.8°C). In Athelstan, the average temperature during the nights of December drops to a freezing cold 22.8°F (-5.1°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Athelstan, during December, the rain falls for 4.6 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 123.8 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Athelstan, during December, snow falls for 5.4 days and regularly aggregates up to 1.34" (34mm) of snow. In Athelstan, during the entire year, snow falls for 28.8 days and aggregates up to 10.51" (267mm) of snow.Daylight
December has the shortest days of the year in Athelstan, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:01 pm CST.
Sunshine
In December, the average sunshine is 5h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Athelstan, IA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Athelstan, IA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Athelstan, IA
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
Athelstan, IA
- Average humidity in December: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Athelstan, IA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in December
Athelstan, IA
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in December
Athelstan, IA
- Average snowfall in December: 1.34"
The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Athelstan, IA
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Athelstan, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Athelstan, IA
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Athelstan, 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
Athelstan, IA
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and September (Cloud cover 28).
Average visibility in December
Athelstan, 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).
