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 is characterized by a slight reduction in average high-temperature, easing from a cool 52.2°F (11.2°C) in November to a chilly 43.2°F (6.2°C). The nighttime temperature, during December, averages of 29.7°F (-1.3°C).Humidity
In Grimes, the average relative humidity in December is 78%.Rainfall
In Grimes, in December, during 11 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Grimes, during the entire year, the rain falls for 167.2 days and collects up to 29.61" (752mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Grimes, during December, snow falls for 4.5 days and regularly aggregates up to 3.15" (80mm) of snow. Throughout the year, there are 26.2 snowfall days, and 17.83" (453mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:13 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:59 pm EST.
Sunshine
In December, the average sunshine is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. When the Sun is at its strongest around midday, find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Grimes have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Grimes have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Grimes, VA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 29.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Grimes, VA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Grimes, VA
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is March (7mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Grimes, VA
- Average humidity in December: 78%
The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Grimes, VA
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in December
Grimes, VA
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in December
Grimes, VA
- Average snowfall in December: 3.15"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grimes, VA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grimes, VA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Grimes, VA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10 days).
Average UV index in December
Grimes, VA
- 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
Grimes, VA
- Average cloud cover in December: 46
The months with the most cloud cover are February, March and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Grimes, VA
- Average visibility in December: 6mi
The months with the highest visibility are February, April, June, July, August, November and December (6mi).
The months with the lowest visibility are January, March, May, September and October (5mi).
Grimes, Virginia, USA
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