December weather forecast
Mertzon, TX

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Weather in December

December, the first month of the winter in Mertzon, is also a moderate month, with an average temperature varying between 40.8°F (4.9°C) and 58.6°F (14.8°C).

Temperature

The coldest months are January and December, with an average high-temperature of 58.6°F (14.8°C).

Humidity

The average relative humidity in December in Mertzon, Texas, is 57%.

Rainfall

In Mertzon, during December, the rain falls for 5.5 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 89.8 rainfall days, and 15.43" (392mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Mertzon, Texas. In Mertzon, in December, during 0.4 snowfall days, 0.12" (3mm) of snow is typically accumulated. In Mertzon, during the entire year, snow falls for 2.5 days and aggregates up to 1.22" (31mm) of snow.

Daylight

With an average of 10h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:24 am and sunset at 5:40 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:51 pm CST.

Sunshine

With an average of 6.4h of sunshine, December has the least sunshine of the year.

UV index

The month with the lowest UV index in Mertzon is December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

What is the coldest month in Mertzon?

The coldest period in Mertzon, Texas, falls in January and December, when the average high-temperature reaches 58.6°F (14.8°C).

What is the temperature in December in Mertzon?

In Mertzon, 58.6°F (14.8°C) is the average high-temperature and 40.8°F (4.9°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is estimated at 91.4°F (33°C).

What is the average humidity in December in Mertzon?

In December, the average relative humidity is 57%.

How many days does it rain in December in Mertzon?

In December, the rain falls for 5.5 days. Throughout December, 0.75" (19mm) of precipitation is accumulated.

How many days does it snow in December in Mertzon?

In December, it is snowing for 0.4 days. Throughout December, 0.12" (3mm) of snow is accumulated.

What is the month with the shortest days in Mertzon?

With an average of 10h and 12min of daylight, December has the shortest days of the year.

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

In December, the average day length is 10h and 10min.

What time are sunrise and sunset in December in Mertzon?

On the first day of December, sunrise is at 7:24 am and sunset at 5:40 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:51 pm CST.

What is the month with the least sunshine in Mertzon?

December has the least sunshine of the year in Mertzon, with an average of 6.4h of sunshine.

How long on average sun shines in December in Mertzon?

The average sunshine duration in December in Mertzon, Texas, is 6.4h.

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

With an average maximum UV index of 3, December is the month with the lowest UV index in Mertzon.

What is the UV index intensity in December in Mertzon?

In Mertzon, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Mertzon, TX

Average temperature in December - Mertzon, TX
  • Average high temperature in December: 58.6°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The months with the lowest average high temperature are January and December (58.6°F).

  • Average low temperature in December: 40.8°F

The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).

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Average pressure in December
Mertzon, TX

Average pressure in December - Mertzon, TX
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).

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Average wind speed in December
Mertzon, TX

Average wind speed in December - Mertzon, TX
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is April (13.7mph).
The calmest month (with the lowest average wind speed) is September (9.6mph).

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Average humidity in December
Mertzon, TX

Average humidity in December - Mertzon, TX
  • Average humidity in December: 57%

The month with the highest relative humidity is November (58%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in December
Mertzon, TX

Average rainfall in December - Mertzon, TX
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in December
Mertzon, TX

Average rainfall days in December - Mertzon, TX
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (3.8 days).

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Average snowfall in December
Mertzon, TX

Average snowfall in December - Mertzon, TX
  • Average snowfall in December: 0.12"

The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Mertzon, TX

Average snowfall days in December - Mertzon, TX
  • Average snowfall days in December: 0.4 days

The month with the highest number of snowfall days is February (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Mertzon, TX
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in December
Mertzon, TX

Average sunshine days in December - Mertzon, TX
  • Average sunshine days in December: 24 days

The month with the most sunshine days is January (25.8 days).
The month with the least sunshine days is May (16.3 days).

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Average UV index in December
Mertzon, TX

Average UV index in December - Mertzon, TX
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Mertzon, TX

Average cloud cover in December - Mertzon, TX
  • Average cloud cover in December: 26

The month with the most cloud cover is March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in December
Mertzon, TX

Average visibility in December - Mertzon, TX
  • Average visibility in December: 6mi

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

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Mertzon, Texas, USA

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