December weather forecast
Grand River, LA

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Weather in December

The first month of the winter, December, is still a refreshing month in Grand River, Louisiana, with an average temperature fluctuating between 47.3°F (8.5°C) and 61.9°F (16.6°C).

Temperature

The onset of December entails a subtle temperature shift, as the average high-temperature eases from a pleasant 68.9°F (20.5°C) in November to an enjoyable 61.9°F (16.6°C). Throughout December, the average low-temperature records at a frosty 47.3°F (8.5°C).

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 81%.

Rainfall

In Grand River, in December, during 11.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Grand River, Louisiana, during the entire year, the rain falls for 148.6 days and collects up to 15.51" (394mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

The month with the shortest days is December, with an average of 10h and 12min of daylight.
On the first day of the month, sunrise is at 6:44 am and sunset at 5:05 pm. On the last day of December, sunrise is at 7:01 am and sunset at 5:16 pm CST.

Sunshine

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

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

The high-temperature, in December, in Grand River, records 61.9°F (16.6°C), while the low-temperature is 47.3°F (8.5°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 104°F (40°C).

What is the most humid month?

The months with the highest humidity are February and December, with an average relative humidity of 81%.

What is the average humidity in December?

The average relative humidity in December is 81%.

How many days does it rain in December?

In Grand River, during December, the rain falls for 11.4 days and regularly aggregates up to 1.1" (28mm) of precipitation.

When it does not snow?

In Grand River, snow does not fall in February through December.

Does it snow in December?

In Grand River, in December, it doesn't snow. In January, it regularly snows.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 12min of daylight.

How many hours of daylight does Grand River have in December?

In December, the average day length is 10h and 14min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:44 am and sunset at 5:05 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 5:16 pm CST.

What is the month with the least sunshine?

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

How many hours of sunshine does Grand River have in December?

In December, the average sunshine duration is 5.1h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In Grand River, 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
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Grand River, LA

Average temperature in December - Grand River, LA
  • Average high temperature in December: 61.9°F

The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in December: 47.3°F

The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (43.5°F).

Average pressure in December
Grand River, LA

Average pressure in December - Grand River, LA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.96"Hg).

Average wind speed in December
Grand River, LA

Average wind speed in December - Grand River, LA
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is February (6.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in December
Grand River, LA

Average humidity in December - Grand River, LA
  • Average humidity in December: 81%

The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is October (73%).

Average rainfall in December
Grand River, LA

Average rainfall in December - Grand River, LA
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is March (0.67").

Average rainfall days in December
Grand River, LA

Average rainfall days in December - Grand River, LA
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is August (20.9 days).
The month with the least rainy days is November (7.1 days).

Average snowfall in December
Grand River, LA

Average snowfall in December - Grand River, LA
  • Average snowfall in December: 0"

The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in December
Grand River, LA

Average snowfall days in December - Grand River, LA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in December /
Average sunshine in December
Grand River, LA

Average daylight in December / Average sunshine in December - Grand River, LA
  • 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: 5h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in December
Grand River, LA

Average sunshine days in December - Grand River, LA
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is November (21.4 days).
The months with the least sunshine days are July and August (7.3 days).

Average UV index in December
Grand River, LA

Average UV index in December - Grand River, LA
  • Average UV index in December: 3

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 3).

Average cloud cover in December
Grand River, LA

Average cloud cover in December - Grand River, LA
  • Average cloud cover in December: 47

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 27).

Average visibility in December
Grand River, LA

Average visibility in December - Grand River, LA
  • Average visibility in December: 6mi

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

Grand River, Louisiana, USA

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