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
December's arrival brings a noticeable temperature shift, dropping from a chilly 48.2°F (9°C) in November to a wintry 33.6°F (0.9°C). December nights in Underwood cool down to an average low-temperature of 21.9°F (-5.6°C).Humidity
In December, the average relative humidity in Underwood is 78%.Rainfall
In Underwood, in December, it is raining for 5 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 125.8 rainfall days, and 25.35" (644mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Underwood, in December, snow falls for 7 days, with typically accumulated 2.36" (60mm) of snow. In Underwood, during the entire year, snow falls for 33.7 days and aggregates up to 13.07" (332mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:48 am and sunset at 5:03 pm CST.
Sunshine
In December, the average sunshine in Underwood is 5h.UV index
The months with the lowest UV index in Underwood, Iowa, are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Underwood in December?
What is the average humidity in December in Underwood?
How much does it rain in Underwood in December?
How much does it snow in Underwood in December?
What is the month with the shortest days in Underwood?
What is the average length of the day in December in Underwood?
When is the sunrise / sunset in December in Underwood?
How many hours of sunshine does Underwood have in December?
When is the lowest UV index in Underwood?
What is the UV index intensity in December in Underwood?
Average temperature in December
Underwood, IA
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 21.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in December
Underwood, 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 (29.86"Hg).
Average wind speed in December
Underwood, IA
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Underwood, IA
- Average humidity in December: 78%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Underwood, IA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
Underwood, IA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in December
Underwood, IA
- Average snowfall in December: 2.36"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Underwood, IA
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Underwood, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Underwood, IA
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Underwood, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Underwood, IA
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in December
Underwood, 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).
Underwood, Iowa, USA
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