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 onset of December brings a clear temperature shift, with the average high-temperature decreasing from a chilly 42.8°F (6°C) in November to a freezing cold 28.4°F (-2°C). Colwell's nighttime temperature in December falls to an average of 18.3°F (-7.6°C).Humidity
In Colwell, Iowa, the average relative humidity in December is 85%.Rainfall
In Colwell, in December, during 5.5 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, in Colwell, Iowa, there are 136.1 rainfall days, and 27.32" (694mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Colwell, during December, snow falls for 13.8 days and regularly aggregates up to 4.84" (123mm) of snow. Throughout the year, there are 59.5 snowfall days, and 25.04" (636mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:23 am and sunset at 4:36 pm. On the last day of December, in Colwell, sunrise is at 7:42 am and sunset at 4:45 pm CST.
Sunshine
The average sunshine in December in Colwell is 4.1h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Colwell. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
How cold is December in Colwell?
What is the average humidity in December in Colwell?
How many days does it rain in December in Colwell?
How much does it snow in Colwell in December?
What is the month with the shortest days in Colwell?
How many hours of daylight does Colwell have in December?
When is the sunrise / sunset in December in Colwell?
How long on average sun shines in December in Colwell?
What are the months with the lowest UV index in Colwell?
How high is the UV index in December in Colwell?
Average temperature in December
Colwell, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in December: 18.3°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 (10.6°F).
Average pressure in December
Colwell, 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
Colwell, 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
Colwell, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Colwell, IA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Colwell, IA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Colwell, IA
- Average snowfall in December: 4.84"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Colwell, IA
- Average snowfall days in December: 13.8 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Colwell, 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 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Colwell, IA
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in December
Colwell, 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, February and December (UV index 1).
Average cloud cover in December
Colwell, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Colwell, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
Colwell, Iowa, USA
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