December weather forecast
O'Brien, TX

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Weather in December

The first month of the winter, December, is also a moderate month in O'Brien, Texas, with an average temperature fluctuating between 55.4°F (13°C) and 38.3°F (3.5°C).

Temperature

O'Brien witnesses its lowest temperatures during January and December, when the average high-temperature reaches 55.4°F (13°C).

Humidity

May, September, November and December, with an average relative humidity of 56%, are the most humid months in O'Brien, Texas.

Rainfall

In December, the rain falls for 4.4 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. In O'Brien, during the entire year, the rain falls for 92.6 days and collects up to 17.99" (457mm) of precipitation.

Snowfall

Months with snowfall in O'Brien are January through April, November and December. In December, in O'Brien, it is snowing for 1.4 days. Throughout December, 1.22" (31mm) of snow is accumulated. In O'Brien, during the entire year, snow falls for 6 days and aggregates up to 3.94" (100mm) of snow.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of December in O'Brien, sunrise is at 7:25 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:42 pm CST.

Sunshine

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

UV index

December is the month with the lowest UV index in O'Brien, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, an average UV index of 2 transforms into the following instructions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What month is the coldest in O'Brien?

During January and December, O'Brien registers its lowest temperatures, averaging a high of 55.4°F (13°C).

What is the average December temperature in O'Brien?

The high-temperature, in December, in O'Brien, is 55.4°F (13°C), while the low-temperature averages to 38.3°F (3.5°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is estimated at 93.2°F (34°C).

What is the most humid month in O'Brien?

The months with the highest humidity in O'Brien are May, September, November and December, with an average relative humidity of 56%.

What is the average humidity in December in O'Brien?

In December, the average relative humidity is 56%.

How many days does it rain in December in O'Brien?

In O'Brien, during December, the rain falls for 4.4 days and regularly aggregates up to 0.71" (18mm) of precipitation.

How much does it snow in O'Brien in December?

In O'Brien, in December, snow falls for 1.4 days, with typically accumulated 1.22" (31mm) of snow.

What is the month with the shortest days in O'Brien?

December has the shortest days of the year in O'Brien, Texas, with an average of 10h and 0min of daylight.

How many hours of daylight does O'Brien have in December?

In December, the average day length in O'Brien, Texas, is 9h and 59min.

When are sunrise and sunset in December in O'Brien?

On the first day of December, sunrise is at 7:25 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:42 pm CST.

What is the month with the least sunshine in O'Brien?

The month with the least sunshine in O'Brien, Texas, is December, with an average of 6.4h of sunshine.

How long on average sun shines in December in O'Brien?

The average sunshine duration in December in O'Brien is 6.4h.

When is the lowest UV index in O'Brien?

The month with the lowest UV index in O'Brien, Texas, is December, with an average maximum UV index of 2.

How high is the UV index in December in O'Brien?

In O'Brien, Texas, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
65.3°F 18.5°C
55.4°F 13°C
55.4°F 13°C
Average low temperature
46.4°F 8°C
38.3°F 3.5°C
36.5°F 2.5°C
Average pressure
30.09" 764mmHg
30.12" 765mmHg
30.15" 766mmHg
Average wind speed
11.4mph 18.3km/h
10.3mph 16.6km/h
10.4mph 16.7km/h
Average max. wind speed
12.4mph 20km/h
11mph 17.7km/h
11.2mph 18km/h
Average wind speed gusts
18.4mph 29.6km/h
16.8mph 27km/h
17.2mph 27.7km/h
Average humidity
56%
56%
52%
Average rainfall
1.18" 30mm
0.71" 18mm
0.75" 19mm
Average rainfall days
4
4.4
3.7
Average snowfall
0.35" 9mm
1.22" 31mm
0.59" 15mm
Average snowfall days
0.4
1.4
1
Average daylight
10h 2min
10h 0min
10h 1min
Average sunshine
6h 3min
6h 2min
7h 1min
Average sunshine days
24.1
24.2
26.3
Average UV index
4
2
3
Average cloud cover
22%
26%
21%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
O'Brien, TX

Average temperature in December - O
  • Average high temperature in December: 55.4°F

The warmest month (with the highest average high temperature) is August (97.3°F).
The months with the lowest average high temperature are January and December (55.4°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is July (77°F).
The coldest month (with the lowest average low temperature) is January (36.5°F).

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Average pressure in December
O'Brien, TX

Average pressure in December - O
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
O'Brien, TX

Average wind speed in December - O
  • Average wind speed in December: 10.3mph

The windiest month (with the highest average wind speed) is April (13mph).
The calmest month (with the lowest average wind speed) is September (9.4mph).

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Average humidity in December
O'Brien, TX

Average humidity in December - O
  • Average humidity in December: 56%

The months with the highest relative humidity are May, September, November and December (56%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in December
O'Brien, TX

Average rainfall in December - O
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.67").

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Average rainfall days in December
O'Brien, TX

Average rainfall days in December - O
  • Average rainfall days in December: 4.4 days

The month with the highest number of rainy days is September (11.7 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall in December
O'Brien, TX

Average snowfall in December - O
  • Average snowfall in December: 1.22"

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
O'Brien, TX

Average snowfall days in December - O
  • Average snowfall days in December: 1.4 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
O'Brien, TX

Average daylight in December / Average sunshine in December - O
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in December
O'Brien, TX

Average sunshine days in December - O
  • Average sunshine days in December: 24.2 days

The month with the most sunshine days is January (26.3 days).
The month with the least sunshine days is September (16.3 days).

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Average UV index in December
O'Brien, TX

Average UV index in December - O
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in December
O'Brien, TX

Average cloud cover in December - O
  • Average cloud cover in December: 26

The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
O'Brien, TX

Average visibility in December - O
  • 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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O'Brien, Texas, USA

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