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
A shift in Missouri Valley's weather is observed as November turns into December, with the average high temperature reducing from a frosty 47.7°F (8.7°C) to a cold 33.3°F (0.7°C). Missouri Valley's nights in December experience an average temperature drop to a freezing cold 21.4°F (-5.9°C).Humidity
In Missouri Valley, the average relative humidity in December is 78%.Rainfall
In Missouri Valley, in December, during 3.6 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Missouri Valley, during the entire year, the rain falls for 108.1 days and collects up to 16.1" (409mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Missouri Valley, in December, snow falls for 5.7 days, with typically accumulated 1.34" (34mm) of snow. Throughout the year, there are 27.6 snowfall days, and 7.28" (185mm) 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 the month, sunrise is at 7:31 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:50 am and sunset at 5:03 pm CST.
Sunshine
In December, the average sunshine is 4.9h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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 many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Missouri Valley have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Missouri Valley have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Missouri Valley, IA
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Missouri Valley, 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
Missouri Valley, IA
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Missouri Valley, 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 (66%).
Average rainfall in December
Missouri Valley, IA
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Missouri Valley, IA
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in December
Missouri Valley, IA
- Average snowfall in December: 1.34"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Missouri Valley, IA
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Missouri Valley, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Missouri Valley, IA
- Average sunshine days in December: 22.7 days
The month with the most sunshine days is December (22.7 days).
The month with the least sunshine days is May (13.1 days).
Average UV index in December
Missouri Valley, 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
Missouri Valley, IA
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Missouri Valley, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Missouri Valley, Iowa, USA
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