December weather forecastPlainfield, IA
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Plainfield, Iowa, with an average temperature varying between 29.3°F (-1.5°C) and 18.7°F (-7.4°C).Temperature
The arrival of December signals a shift in temperature, down from a chilly 43.2°F (6.2°C) in November to a freezing cold 29.3°F (-1.5°C). In the month of December, Plainfield witnesses a consistent average low-temperature of 18.7°F (-7.4°C).Humidity
The average relative humidity in December is 84%.Rainfall
In December, the rain falls for 5 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. Throughout the year, there are 127.3 rainfall days, and 26.61" (676mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Plainfield, in December, during 11.5 snowfall days, 3.82" (97mm) of snow is typically accumulated. Throughout the year, there are 46.8 snowfall days, and 19.76" (502mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, 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
In Plainfield, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Boost your sun resistance with garments that are densely woven yet spacious. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Plainfield, IA
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in December: 18.7°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in December
Plainfield, 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
Plainfield, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Plainfield, IA
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Plainfield, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Plainfield, IA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in December
Plainfield, IA
- Average snowfall in December: 3.82"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plainfield, IA
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plainfield, IA
- Average daylight in December: 9h and 6min
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 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Plainfield, IA
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in December
Plainfield, 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
Plainfield, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Plainfield, 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).
