December weather forecastHoly Cross, IA
December
Weather in December
December, the first month of the winter in Holy Cross, is also a subzero cold month, with an average temperature fluctuating between 20.7°F (-6.3°C) and 31.3°F (-0.4°C).Temperature
Holy Cross observes a minor decrease in the average high-temperature with the arrival of December, falling from November's frosty 43.7°F (6.5°C) to a subzero cold 31.3°F (-0.4°C). During December, the temperature in Holy Cross tends to dip to an average of 20.7°F (-6.3°C) at night.Humidity
In December, the average relative humidity in Holy Cross is 83%.Rainfall
In Holy Cross, in December, it is raining for 7.5 days, with typically 1.69" (43mm) of accumulated precipitation. In Holy Cross, during the entire year, the rain falls for 150.8 days and collects up to 32.4" (823mm) of precipitation.Snowfall
Months with snowfall in Holy Cross are January through April, October through December. In Holy Cross, Iowa, during December, snow falls for 11.3 days and regularly aggregates up to 4.37" (111mm) of snow. Throughout the year, there are 53.4 snowfall days, and 22.4" (569mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Holy Cross.On the first day of the month, sunrise is at 7:14 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:40 pm CST.
Sunshine
In Holy Cross, the average sunshine in December is 4h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Holy Cross, IA
- Average high temperature in December: 31.3°F
The warmest month (with the highest average high temperature) is July (79.5°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°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Holy Cross, IA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Holy Cross, IA
- Average wind speed in December: 10.1mph
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 (7mph).
Average humidity in December
Holy Cross, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in December
Holy Cross, IA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (4.72").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in December
Holy Cross, IA
- Average rainfall days in December: 7.5 days
The months with the highest number of rainy days are May and June (19.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Holy Cross, IA
- Average snowfall in December: 4.37"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Holy Cross, IA
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Holy Cross, 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 0min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Holy Cross, IA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Holy Cross, 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, November and December (UV index 1).
Average cloud cover in December
Holy Cross, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Holy Cross, 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).
