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
The shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 43.3°F (6.3°C) to a subzero cold 30°F (-1.1°C). During December, Donnan records a consistent average nighttime temperature of 19.4°F (-7°C).Humidity
The average relative humidity in December in Donnan is 84%.Rainfall
In Donnan, in December, it is raining for 6.3 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 140.2 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Donnan, Iowa. In Donnan, in December, snow falls for 9.3 days, with typically accumulated 3.74" (95mm) of snow. Throughout the year, in Donnan, there are 47.1 snowfall days, and 19.96" (507mm) 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 7:19 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:43 pm CST.
Sunshine
The average sunshine in December in Donnan is 4.1h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading 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 daily UV index of 1 in December interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. To avoid the Sun's strongest rays, limit exposure around the mid-day period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold is it in Donnan in December?
What is the average humidity in December in Donnan?
How many days does it rain in December in Donnan?
How many days does it snow in December in Donnan?
What is the month with the shortest days in Donnan?
How many hours of daylight does Donnan have in December?
When are sunrise and sunset in December in Donnan?
How many hours of sunshine does Donnan have in December?
What are the months with the lowest UV index in Donnan?
How high is the UV index in December in Donnan?
Average temperature in December
Donnan, IA
- Average high temperature in December: 30°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in December: 19.4°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 (10.9°F).
Average pressure in December
Donnan, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Donnan, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Donnan, IA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Donnan, IA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (4.45").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Donnan, IA
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Donnan, IA
- Average snowfall in December: 3.74"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Donnan, IA
- Average snowfall days in December: 9.3 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Donnan, 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 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Donnan, IA
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (8.9 days).
Average UV index in December
Donnan, IA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Donnan, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Donnan, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Donnan, Iowa, USA
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