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
Stepping into December, Altoona observes a temperature decline, with the average high falling from November's fresh 51.6°F (10.9°C) to an icy 41.9°F (5.5°C). An average low-temperature of 30.9°F (-0.6°C) is anticipated throughout the nights in Altoona during December.Humidity
The months with the highest humidity in Altoona are January, February and December, with an average relative humidity of 82%.Rainfall
In Altoona, during December, the rain falls for 11.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 161.8 rainfall days, and 30.83" (783mm) of precipitation is accumulated.Snowfall
Months with snowfall in Altoona, Ohio, are January through April, October through December. In Altoona, in December, snow falls for 7.8 days, with typically accumulated 2.01" (51mm) of snow. Throughout the year, in Altoona, there are 35.8 snowfall days, and 12.28" (312mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:31 am and sunset at 5:08 pm. On the last day of December, sunrise is at 7:49 am and sunset at 5:17 pm EST.
Sunshine
In Altoona, the average sunshine in December is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold in Altoona?
What is the most humid month in Altoona?
What is the average humidity in December in Altoona?
How many days does it rain in December in Altoona?
How many days does it snow in December in Altoona?
What is the month with the shortest days in Altoona?
How many hours of daylight does Altoona have in December?
When is the sunrise / sunset in December in Altoona?
How long on average sun shines in December in Altoona?
When is the lowest UV index in Altoona?
What is the UV index reading in December in Altoona?
Average temperature in December
Altoona, OH
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Altoona, OH
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Altoona, OH
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Altoona, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is August (75%).
Average rainfall in December
Altoona, OH
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is October (1.97").
Average rainfall days in December
Altoona, OH
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Altoona, OH
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Altoona, OH
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is January (10.3 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, OH
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Altoona, OH
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Altoona, OH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Altoona, OH
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Altoona, OH
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
Altoona, Ohio, USA
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