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
The shift from November to December is characterized by a clear decrease in the average high-temperature, reducing from an icy 42.3°F (5.7°C) to a freezing cold 26.8°F (-2.9°C). An average low-temperature of 15.8°F (-9°C) is anticipated throughout the nights during December.Humidity
The average relative humidity in December is 85%.Rainfall
In Harris, in December, during 4.9 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, there are 122.3 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Harris, in December, during 11.1 snowfall days, 3.46" (88mm) of snow is typically accumulated. In Harris, during the entire year, snow falls for 51.6 days and aggregates up to 19.69" (500mm) of snow.Daylight
December has the shortest days of the year in Harris, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:35 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:54 am and sunset at 4:55 pm CST.
Sunshine
The average sunshine in December is 4.3h.UV index
In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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 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 Harris have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Harris have in December?
What is the UV index intensity in December?
Average temperature in December
Harris, IA
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 15.8°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 (9.5°F).
Average pressure in December
Harris, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Harris, IA
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in December
Harris, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Harris, IA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Harris, IA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in December
Harris, IA
- Average snowfall in December: 3.46"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harris, IA
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harris, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Harris, IA
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in December
Harris, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Harris, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Harris, 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).
Harris, Iowa, USA
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