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 brings a minor decrease, with the average high-temperature reducing from a chilly 46.2°F (7.9°C) in November to a wintry 33.8°F (1°C). Cedar Valley's nights in December cool down to an average low-temperature of 23°F (-5°C).Humidity
In Cedar Valley, the average relative humidity in December is 81%.Rainfall
In Cedar Valley, in December, it is raining for 6.5 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 139.1 rainfall days, and 29.57" (751mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Cedar Valley, in December, snow falls for 7.3 days, with typically accumulated 2.44" (62mm) of snow. Throughout the year, in Cedar Valley, there are 34.5 snowfall days, and 16.85" (428mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:13 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:44 pm CST.
Sunshine
The average sunshine in December is 4.5h.UV index
January 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 average individuals.Note: The daily high UV index of 1 during December translates into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Cedar Valley have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Cedar Valley have in December?
When is the lowest UV index in Cedar Valley?
What is the UV index reading in December?
Average temperature in December
Cedar Valley, IA
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in December
Cedar Valley, 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 (29.9"Hg).
Average wind speed in December
Cedar Valley, IA
- Average wind speed in December: 9.9mph
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 (6.8mph).
Average humidity in December
Cedar Valley, IA
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Cedar Valley, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in December
Cedar Valley, IA
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in December
Cedar Valley, IA
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cedar Valley, IA
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cedar Valley, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 3min
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 6min).
Average sunshine days in December
Cedar Valley, IA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Cedar Valley, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Cedar Valley, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Cedar Valley, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Cedar Valley, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location