December weather forecast
Grandfalls, TX

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Weather in December

The first month of the winter, December, is still a mild month in Grandfalls, Texas, with an average temperature ranging between max 58.3°F (14.6°C) and min 40.5°F (4.7°C).

Temperature

In Grandfalls, the lowest temperatures are generally noted in December, averaging a high of 58.3°F (14.6°C) and a low of 40.5°F (4.7°C).

Humidity

September and December, with an average relative humidity of 49%, are the most humid months.

Rainfall

In December, the rain falls for 2.5 days. Throughout December, 0.28" (7mm) of precipitation is accumulated. In Grandfalls, during the entire year, the rain falls for 63.3 days and collects up to 6.61" (168mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. The months with the most snowfall are November and December, with an average 0.31" (8mm) of accumulated snow.

Daylight

With an average of 10h and 6min of daylight, December has the shortest days of the year in Grandfalls.
On the first day of December, sunrise is at 7:33 am and sunset at 5:48 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:59 pm CST.

Sunshine

The month with the least sunshine is December, with an average of 7h of sunshine.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily UV index of 3 turns into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Grandfalls?

Grandfalls notes the coldest temperatures in December, with a average high of 58.3°F (14.6°C) and a low of 40.5°F (4.7°C).

What is the usual temperature for Grandfalls in December?

In Grandfalls, 58.3°F (14.6°C) is the average high-temperature and 40.5°F (4.7°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is appraised at 89.6°F (32°C).

What is the most humid month?

September and December, with an average relative humidity of 49%, are most humid months.

What is the average humidity in December?

In December, the average relative humidity is 49%.

How much does it rain in December?

In December, the rain falls for 2.5 days. Throughout December, 0.28" (7mm) of precipitation is accumulated.

What is the snowiest month?

The months with the most snowfall are November and December, with an average 0.31" (8mm) of accumulated snow.

How many days does it snow in December?

In December, it is snowing for 1 days. Throughout December, 0.31" (8mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 10h and 6min of daylight.

How many hours of daylight does Grandfalls have in December?

In Grandfalls, the average day length in December is 10h and 9min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:33 am and sunset at 5:48 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:59 pm CST.

What is the month with the least sunshine?

With an average of 7h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Grandfalls have in December?

The average sunshine duration in December is 7h.

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

The month with the lowest UV index is December, with an average maximum UV index of 3.

What is the UV index reading in December?

In Grandfalls, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents 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
Grandfalls, TX

Average temperature in December - Grandfalls, TX
  • Average high temperature in December: 58.3°F

The warmest month (with the highest average high temperature) is June (96.4°F).
The month with the lowest average high temperature is December (58.3°F).

  • Average low temperature in December: 40.5°F

The month with the highest average low temperature is August (77°F).
The coldest month (with the lowest average low temperature) is January (39.4°F).

Average pressure in December
Grandfalls, TX

Average pressure in December - Grandfalls, TX
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Grandfalls, TX

Average wind speed in December - Grandfalls, TX
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is June (13.2mph).
The calmest month (with the lowest average wind speed) is December (8.9mph).

Average humidity in December
Grandfalls, TX

Average humidity in December - Grandfalls, TX
  • Average humidity in December: 49%

The months with the highest relative humidity are September and December (49%).
The month with the lowest relative humidity is April (31%).

Average rainfall in December
Grandfalls, TX

Average rainfall in December - Grandfalls, TX
  • Average rainfall in December: 0.28"

The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is February (0.08").

Average rainfall days in December
Grandfalls, TX

Average rainfall days in December - Grandfalls, TX
  • Average rainfall days in December: 2.5 days

The month with the highest number of rainy days is September (10 days).
The month with the least rainy days is February (1.9 days).

Average snowfall in December
Grandfalls, TX

Average snowfall in December - Grandfalls, TX
  • Average snowfall in December: 0.31"

The months with the highest snowfall are November and December (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Grandfalls, TX

Average snowfall days in December - Grandfalls, TX
  • Average snowfall days in December: 1 days

The month with the highest number of snowfall days is December (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

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

  • Average sunshine in December: 7h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

Average sunshine days in December
Grandfalls, TX

Average sunshine days in December - Grandfalls, TX
  • Average sunshine days in December: 27.1 days

The month with the most sunshine days is January (27.8 days).
The month with the least sunshine days is September (18.1 days).

Average UV index in December
Grandfalls, TX

Average UV index in December - Grandfalls, 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).

Average cloud cover in December
Grandfalls, TX

Average cloud cover in December - Grandfalls, TX
  • Average cloud cover in December: 19

The month with the most cloud cover is September (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 12).

Average visibility in December
Grandfalls, TX

Average visibility in December - Grandfalls, 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).

Grandfalls, Texas, USA

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