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
Viola in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 44.8°F (7.1°C) to a cold 32.4°F (0.2°C). In December, in Viola, the average low-temperature is a freezing cold 22.1°F (-5.5°C).Humidity
In December, the average relative humidity in Viola is 82%.Rainfall
In Viola, during December, the rain falls for 6.5 days and regularly aggregates up to 1.3" (33mm) of precipitation. Throughout the year, there are 137.5 rainfall days, and 27.68" (703mm) of precipitation is accumulated.Snowfall
Months with snowfall in Viola are January through April, October through December. In Viola, in December, snow falls for 8.7 days, with typically accumulated 2.24" (57mm) of snow. Throughout the year, there are 38.8 snowfall days, and 15.16" (385mm) of snow is accumulated.Daylight
The month with the shortest days in Viola is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:44 pm CST.
Sunshine
In Viola, the average sunshine in December is 4.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Viola?
What is the average humidity in December in Viola?
How much does it rain in Viola in December?
How many days does it snow in December in Viola?
What is the month with the shortest days in Viola?
How many hours of daylight does Viola have in December?
When is the sunrise / sunset in December in Viola?
How long on average sun shines in December in Viola?
When is the lowest UV index in Viola?
How high is the UV index in December in Viola?
Average temperature in December
Viola, IA
- Average high temperature in December: 32.4°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 (25.5°F).
- Average low temperature in December: 22.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Viola, 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
Viola, 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 (7mph).
Average humidity in December
Viola, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Viola, IA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in December
Viola, IA
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Viola, IA
- Average snowfall in December: 2.24"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Viola, IA
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Viola, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Viola, IA
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in December
Viola, IA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Viola, IA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Viola, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Viola, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location