December weather forecast
Alto, TX

Weather in December

December, the first month of the winter in Alto, is also a moderate month, with an average temperature ranging between max 57.9°F (14.4°C) and min 42.6°F (5.9°C).

Temperature

In December, the average high-temperature slightly decreases from an enjoyable 66.2°F (19°C) in November to a moderate 57.9°F (14.4°C). The average low-temperature, in December, is 42.6°F (5.9°C).

Humidity

In Alto, Texas, the average relative humidity in December is 81%.

Rainfall

In Alto, in December, it is raining for 12.6 days, with typically 3.07" (78mm) of accumulated precipitation. In Alto, during the entire year, the rain falls for 159.2 days and collects up to 35.12" (892mm) of precipitation.

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows in Alto. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 1.5 snowfall days, and 0.43" (11mm) of snow is accumulated.

Daylight

With an average of 10h and 8min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:02 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:27 pm CST.

Sunshine

The month with the least sunshine is December, with an average of 4.9h of sunshine.

UV index

With an average maximum UV index of 2, December is the month with the lowest UV index in Alto. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Alto?

The average high-temperature, in December, is 57.9°F (14.4°C), while the average low-temperature is 42.6°F (5.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in September is estimated at 104°F (40°C).

What is the average humidity in December in Alto?

In Alto, the average relative humidity in December is 81%.

How many days does it rain in December in Alto?

In Alto, Texas, during December, the rain falls for 12.6 days and regularly aggregates up to 3.07" (78mm) of precipitation.

When does it start snowing in Alto?

December is the first month it typically snows in Alto, Texas. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Alto?

The month with the shortest days in Alto is December, with an average of 10h and 8min of daylight.

What is the average length of the day in December in Alto?

The average day length in December in Alto, Texas, is 10h and 8min.

When is the sunrise / sunset in December in Alto?

On the first day of December, sunrise is at 7:02 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:27 pm CST.

What is the month with the least sunshine in Alto?

With an average of 4.9h of sunshine, December has the least sunshine of the year in Alto, Texas.

How long on average sun shines in December in Alto?

In Alto, Texas, the average sunshine duration in December is 4.9h.

What is the month with the lowest UV index in Alto?

With an average maximum UV index of 2, December is the month with the lowest UV index in Alto.

How high is the UV index in December in Alto?

In December, the average daily maximum UV index in Alto is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Alto, TX

Average temperature in December - Alto, TX
  • Average high temperature in December: 57.9°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (55.9°F).

  • Average low temperature in December: 42.6°F

The months with the highest average low temperature are July and August (73°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).

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Average pressure in December
Alto, TX

Average pressure in December - Alto, TX
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Alto, TX

Average wind speed in December - Alto, TX
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.8mph).

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Average humidity in December
Alto, TX

Average humidity in December - Alto, TX
  • Average humidity in December: 81%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is August (69%).

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Average rainfall in December
Alto, TX

Average rainfall in December - Alto, TX
  • Average rainfall in December: 3.07"

The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is November (2.24").

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Average rainfall days in December
Alto, TX

Average rainfall days in December - Alto, TX
  • Average rainfall days in December: 12.6 days

The months with the highest number of rainy days are March and June (14.5 days).
The month with the least rainy days is November (11 days).

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Average snowfall in December
Alto, TX

Average snowfall in December - Alto, TX
  • Average snowfall in December: 0.04"

The month with the highest snowfall is January (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Alto, TX

Average snowfall days in December - Alto, TX
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Alto, TX

Average daylight in December / Average sunshine in December - Alto, TX
  • Average daylight in December: 10h and 8min

The month with the longest days is June (Average daylight: 14h and 11min).
The month with the shortest days is December (Average daylight: 10h and 8min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in December
Alto, TX

Average sunshine days in December - Alto, TX
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is February (12.3 days).

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Average UV index in December
Alto, TX

Average UV index in December - Alto, TX
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in December
Alto, TX

Average cloud cover in December - Alto, TX
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Alto, TX

Average visibility in December - Alto, TX
  • Average visibility in December: 5mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (5mi).

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