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
Witnessing a clear downswing, the average high-temperature during December drops from November's wintry 39.6°F (4.2°C) to a subzero cold 24.8°F (-4°C). The month of December records an average low-temperature of 14.2°F (-9.9°C) in Altoona, Wisconsin.Humidity
In December, the average relative humidity is 89%.Rainfall
In Altoona, during December, the rain falls for 4.1 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 128.5 rainfall days, and 26.22" (666mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Altoona. In Altoona, in December, during 11.3 snowfall days, 4.69" (119mm) of snow is typically accumulated. In Altoona, during the entire year, snow falls for 57.9 days and aggregates up to 25.87" (657mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:26 pm. On the last day of December, sunrise is at 7:43 am and sunset at 4:35 pm CST.
Sunshine
In December, the average sunshine is 3h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Altoona. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 1 during December leads to these advisories:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Altoona in December?
What is the average humidity in December in Altoona?
How much does it rain in Altoona in December?
How many days does it snow in December in Altoona?
What is the month with the shortest days in Altoona?
What is the average length of the day in December in Altoona?
When are sunrise and sunset in December in Altoona?
How many hours of sunshine does Altoona have in December?
When is the lowest UV index in Altoona?
What is the UV index intensity in December in Altoona?
Average temperature in December
Altoona, WI
- Average high temperature in December: 24.8°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in December
Altoona, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Altoona, WI
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Altoona, WI
- Average humidity in December: 89%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Altoona, WI
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
Altoona, WI
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in December
Altoona, WI
- Average snowfall in December: 4.69"
The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Altoona, WI
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Altoona, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in December
Altoona, WI
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is January (17.4 days).
The month with the least sunshine days is June (10 days).
Average UV index in December
Altoona, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Altoona, WI
- Average cloud cover in December: 69
The months with the most cloud cover are January, February and December (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Altoona, WI
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Altoona, Wisconsin, USA
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