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 introduces a moderate change in Shell Rock's weather, with average high-temperatures falling from November's frosty 43.5°F (6.4°C) to a freezing cold 30.2°F (-1°C). Shell Rock experiences an average low-temperature reading of 19.8°F (-6.8°C) throughout December.Humidity
In December, the average relative humidity in Shell Rock is 83%.Rainfall
In Shell Rock, in December, it is raining for 5.7 days, with typically 1.54" (39mm) of accumulated precipitation. In Shell Rock, during the entire year, the rain falls for 138.7 days and collects up to 28.78" (731mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Shell Rock, in December, snow falls for 9.5 days, with typically accumulated 3.39" (86mm) of snow. Throughout the year, there are 43.6 snowfall days, and 19.25" (489mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Shell Rock.On the first day of December in Shell Rock, sunrise is at 7:21 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:46 pm CST.
Sunshine
The average sunshine in December in Shell Rock, Iowa, is 4.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 1 in December translates into this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Shell Rock?
What is the average humidity in December in Shell Rock?
How many days does it rain in December in Shell Rock?
How many days does it snow in December in Shell Rock?
What is the month with the shortest days in Shell Rock?
What is the average length of the day in December in Shell Rock?
When are sunrise and sunset in December in Shell Rock?
How many hours of sunshine does Shell Rock have in December?
What are the months with the lowest UV index in Shell Rock?
How high is the UV index in December in Shell Rock?
Average temperature in December
Shell Rock, IA
- Average high temperature in December: 30.2°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (23.9°F).
- Average low temperature in December: 19.8°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in December
Shell Rock, 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
Shell Rock, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Shell Rock, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Shell Rock, IA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in December
Shell Rock, IA
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in December
Shell Rock, IA
- Average snowfall in December: 3.39"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Shell Rock, IA
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Shell Rock, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Shell Rock, IA
- Average sunshine days in December: 17.6 days
The months with the most sunshine days are October and November (17.8 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Shell Rock, 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 and December (UV index 1).
Average cloud cover in December
Shell Rock, IA
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Shell Rock, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Shell Rock, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location