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 onset brings a clear reduction in the average high-temperature, falling from a chilly 45.3°F (7.4°C) in November to a subzero cold 29.5°F (-1.4°C). An average low-temperature of 18°F (-7.8°C) is anticipated throughout the nights during December.Humidity
In December, the average relative humidity in Westfield is 82%.Rainfall
In Westfield, in December, during 4.9 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 134.3 rainfall days, and 24.45" (621mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 10 days. Throughout December, 2.52" (64mm) of snow is accumulated. In Westfield, during the entire year, snow falls for 45.8 days and aggregates up to 16.22" (412mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Westfield, sunrise is at 7:37 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:02 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
In Westfield, Iowa, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Caution! The reflection of snow can nearly 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 it in 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?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
How high is the UV index in December?
Average temperature in December
Westfield, IA
- Average high temperature in December: 29.5°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Westfield, 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
Westfield, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
Westfield, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Westfield, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Westfield, IA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is June (19.3 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall in December
Westfield, IA
- Average snowfall in December: 2.52"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Westfield, IA
- Average snowfall days in December: 10 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Westfield, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Westfield, IA
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Westfield, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Westfield, IA
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Westfield, 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).
Westfield, Iowa, USA
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