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
West Union experiences a temperature shift at the start of December, with average high-temperatures adjusting from a cold 42.6°F (5.9°C) in November to a freezing cold 29.5°F (-1.4°C). During the month of December, the nighttime temperature in West Union falls to an average of 18.9°F (-7.3°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In West Union, in December, during 5.8 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In West Union, Iowa, during the entire year, the rain falls for 146.5 days and collects up to 31.3" (795mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In West Union, in December, snow falls for 13.1 days, with typically accumulated 5.04" (128mm) of snow. Throughout the year, there are 59.9 snowfall days, and 24.84" (631mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in West Union.On the first day of December in West Union, sunrise is at 7:19 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:42 pm CST.
Sunshine
In West Union, the average sunshine in December is 4h.UV index
The months with the lowest UV index in West Union are January and December, with an average maximum UV index of 1. 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: 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. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
How cold is December in West Union?
What is the average humidity in December in West Union?
How many days does it rain in December in West Union?
How many days does it snow in December in West Union?
What is the month with the shortest days in West Union?
What is the average length of the day in December in West Union?
When are sunrise and sunset in December in West Union?
How long on average sun shines in December in West Union?
When is the lowest UV index in West Union?
What is the UV index intensity in December in West Union?
Average temperature in December
West Union, IA
- Average high temperature in December: 29.5°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
West Union, 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
West Union, IA
- Average wind speed in December: 10mph
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 (7.1mph).
Average humidity in December
West Union, IA
- Average humidity in December: 84%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in December
West Union, IA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is June (5.08").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
West Union, IA
- Average rainfall days in December: 5.8 days
The months with the highest number of rainy days are May and June (19.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
West Union, IA
- Average snowfall in December: 5.04"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Union, IA
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Union, 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 0min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
West Union, IA
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in December
West Union, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
West Union, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
West Union, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
West Union, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location
