December weather forecastDunkerton, IA
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Dunkerton, Iowa, with an average temperature ranging between min 20.7°F (-6.3°C) and max 31.1°F (-0.5°C).Temperature
Dunkerton's progression into December involves a drop in the average high-temperature, receding from a chilly 43.9°F (6.6°C) in November to a subzero cold 31.1°F (-0.5°C). An average nighttime temperature of 20.7°F (-6.3°C) is recorded in Dunkerton during December.Humidity
The average relative humidity in December is 82%.Rainfall
In Dunkerton, during December, the rain falls for 6.8 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 143.2 rainfall days, and 31.02" (788mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Dunkerton, Iowa. In Dunkerton, in December, snow falls for 10.5 days, with typically accumulated 3.7" (94mm) of snow. In Dunkerton, during the entire year, snow falls for 48.7 days and aggregates up to 19.09" (485mm) of snow.Daylight
December has the shortest days of the year in Dunkerton, with an average of 9h and 6min of daylight.On the first day of December in Dunkerton, sunrise is at 7:19 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:45 pm CST.
Sunshine
The average sunshine in December in Dunkerton is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dunkerton, IA
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Dunkerton, 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
Dunkerton, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Dunkerton, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Dunkerton, IA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (4.88").
The driest months (with the least rainfall) are January and February (1.14").
Average rainfall days in December
Dunkerton, IA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is June (19.6 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Dunkerton, IA
- Average snowfall in December: 3.7"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dunkerton, IA
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dunkerton, 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 12min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Dunkerton, IA
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Dunkerton, 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
Dunkerton, IA
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Dunkerton, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
