December weather forecast
Harlingen, TX

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Weather in December

The first month of the winter, December, is also an agreeable month in Harlingen, Texas, with an average temperature varying between 58.1°F (14.5°C) and 70.7°F (21.5°C).

Temperature

The onset of December results in a small decrease in the average high-temperature, moderately receding from a moderately hot 76.5°F (24.7°C) in November to a pleasant 70.7°F (21.5°C). An average low-temperature of 58.1°F (14.5°C) is recorded during the nights in December in Harlingen, Texas.

Humidity

The average relative humidity in December in Harlingen is 72%.

Rainfall

In Harlingen, in December, it is raining for 5.5 days, with typically 0.24" (6mm) of accumulated precipitation. Throughout the year, in Harlingen, there are 79.8 rainfall days, and 5.24" (133mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall in Harlingen.

Daylight

With an average of 10h and 30min of daylight, December has the shortest days of the year.
On the first day of December in Harlingen, sunrise is at 7:01 am and sunset at 5:38 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:50 pm CST.

Sunshine

The month with the least sunshine is December, with an average of 5.1h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 4 in December suggests the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the usual temperature for Harlingen in December?

In December, in Harlingen, the average high-temperature is 70.7°F (21.5°C), and the average low-temperature is 58.1°F (14.5°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in October is calculated to be 91.4°F (33°C).

What is the average humidity in December in Harlingen?

In Harlingen, the average relative humidity in December is 72%.

How much does it rain in Harlingen in December?

In December, in Harlingen, Texas, the rain falls for 5.5 days. Throughout December, 0.24" (6mm) of precipitation is accumulated.

When it does not snow in Harlingen?

In Harlingen, snow does not fall in January, March through December.

What is the month with the shortest days in Harlingen?

With an average of 10h and 30min of daylight, December has the shortest days of the year in Harlingen, Texas.

How many hours of daylight does Harlingen have in December?

The average day length in December is 10h and 32min.

What time are sunrise and sunset in December in Harlingen?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 5:38 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:50 pm CST.

What is the month with the least sunshine in Harlingen?

December has the least sunshine of the year in Harlingen, with an average of 5.1h of sunshine.

How many hours of sunshine does Harlingen have in December?

In Harlingen, the average sunshine duration in December is 5.1h.

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

With an average maximum UV index of 4, December is the month with the lowest UV index in Harlingen.

How high is the UV index in December in Harlingen?

In Harlingen, Texas, the average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
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
Harlingen, TX

Average temperature in December - Harlingen, TX
  • Average high temperature in December: 70.7°F

The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (68.7°F).

  • Average low temperature in December: 58.1°F

The month with the highest average low temperature is August (80.1°F).
The coldest month (with the lowest average low temperature) is January (55.4°F).

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Average pressure in December
Harlingen, TX

Average pressure in December - Harlingen, TX
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in December
Harlingen, TX

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

The windiest months (with the highest average wind speed) are March and April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).

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Average humidity in December
Harlingen, TX

Average humidity in December - Harlingen, TX
  • Average humidity in December: 72%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in December
Harlingen, TX

Average rainfall in December - Harlingen, TX
  • Average rainfall in December: 0.24"

The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is February (0.16").

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Average rainfall days in December
Harlingen, TX

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

The month with the highest number of rainy days is September (11.5 days).
The month with the least rainy days is February (4.7 days).

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Average snowfall days in December
Harlingen, TX

Average snowfall days in December - Harlingen, TX
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Harlingen, TX
  • Average daylight in December: 10h and 3min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days in December
Harlingen, TX

Average sunshine days in December - Harlingen, TX
  • Average sunshine days in December: 22.9 days

The month with the most sunshine days is March (23.3 days).
The month with the least sunshine days is September (15.6 days).

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Average UV index in December
Harlingen, TX

Average UV index in December - Harlingen, TX
  • Average UV index in December: 4

The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).

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Average cloud cover in December
Harlingen, TX

Average cloud cover in December - Harlingen, TX
  • Average cloud cover in December: 45

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 18).

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Average visibility in December
Harlingen, TX

Average visibility in December - Harlingen, 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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Harlingen, Texas, USA

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