Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December brings a minor shift in the average high-temperature, adjusting from a fresh 53.1°F (11.7°C) in November to a frosty 44.1°F (6.7°C). Grayson observes an average nighttime low-temperature of 32.5°F (0.3°C) during the month of December.Humidity
In December, the average relative humidity is 80%.Rainfall
The months with the most rainfall are April and December, with an average 3.07" (78mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Grayson, in December, during 7.5 snowfall days, 2.2" (56mm) of snow is typically accumulated. Throughout the year, there are 35.9 snowfall days, and 11.73" (298mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Grayson.On the first day of December, sunrise is at 7:30 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 5:21 pm EST.
Sunshine
In Grayson, the average sunshine in December is 4.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Grayson. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 suggests this advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Grayson in December?
What is the average humidity in December in Grayson?
What is the wettest month in Grayson?
How many days does it rain in December in Grayson?
How many days does it snow in December in Grayson?
What is the month with the shortest days in Grayson?
How many hours of daylight does Grayson have in December?
What time are sunrise and sunset in December in Grayson?
How long on average sun shines in December in Grayson?
What are the months with the lowest UV index in Grayson?
What is the UV index intensity in December in Grayson?
Average temperature in December
Grayson, KY
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Grayson, KY
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Grayson, KY
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Grayson, KY
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Grayson, KY
- Average rainfall in December: 3.07"
The wettest months (with the highest rainfall) are April and December (3.07").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Grayson, KY
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in December
Grayson, KY
- Average snowfall in December: 2.2"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grayson, KY
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grayson, KY
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Grayson, KY
- Average sunshine days in December: 12.9 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Grayson, KY
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Grayson, KY
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Grayson, KY
- Average visibility in December: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
Grayson, Kentucky, USA
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