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 brings a noticeable decrease in the average high-temperature, dropping from a chilly 43.2°F (6.2°C) to a subzero cold 28°F (-2.2°C). In the month of December, the nighttime temperature dips to a steady average of 17.4°F (-8.1°C).Humidity
In Fallow, Iowa, the average relative humidity in December is 84%.Rainfall
In Fallow, Iowa, during December, the rain falls for 4.4 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 138 rainfall days, and 26.77" (680mm) of precipitation is accumulated.Snowfall
Months with snowfall in Fallow are January through May, October through December. In Fallow, during December, snow falls for 11.9 days and regularly aggregates up to 3.74" (95mm) of snow. Throughout the year, there are 51.6 snowfall days, and 23.03" (585mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:32 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:54 pm CST.
Sunshine
In Fallow, the average sunshine in December is 4.4h.UV index
In December, the average daily maximum UV index in Fallow, Iowa, is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The UV index of 2 during December leads to these advisories:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
How cold is it in Fallow in December?
What is the average humidity in December in Fallow?
How much does it rain in Fallow in December?
How much does it snow in Fallow in December?
What is the month with the shortest days in Fallow?
What is the average length of the day in December in Fallow?
When is the sunrise / sunset in December in Fallow?
How long on average sun shines in December in Fallow?
What is the UV index intensity in December in Fallow?
Average temperature in December
Fallow, IA
- Average high temperature in December: 28°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 (23.2°F).
- Average low temperature in December: 17.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Fallow, 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
Fallow, IA
- Average wind speed in December: 10.6mph
The windiest months (with the highest average wind speed) are January and April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Fallow, IA
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Fallow, IA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (4.25").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Fallow, IA
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is June (20 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in December
Fallow, IA
- Average snowfall in December: 3.74"
The month with the highest snowfall is February (5.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fallow, IA
- Average snowfall days in December: 11.9 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fallow, IA
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Fallow, IA
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in December
Fallow, IA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Fallow, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and September (Cloud cover 31).
Average visibility in December
Fallow, 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).
Fallow, Iowa, USA
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