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
With the commencement of December, Keysville records a moderate temperature decline, with the average high easing from November's cool 51.3°F (10.7°C) to a wintry 42.6°F (5.9°C). In December, Keysville records an average nighttime temperature of 30.4°F (-0.9°C).Humidity
The average relative humidity in December in Keysville, Maryland, is 79%.Rainfall
In December, the rain falls for 9.8 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. Throughout the year, in Keysville, Maryland, there are 157.5 rainfall days, and 27.52" (699mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Keysville, Maryland, in December, during 3.9 snowfall days, 1.57" (40mm) of snow is typically accumulated. Throughout the year, there are 22.3 snowfall days, and 9.76" (248mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December in Keysville, Maryland, sunrise is at 7:11 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:55 pm EST.
Sunshine
The average sunshine in December in Keysville is 5h.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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
Is it cold in Keysville during December?
What is the average humidity in December in Keysville?
How much does it rain in Keysville in December?
How many days does it snow in December in Keysville?
What is the month with the shortest days in Keysville?
How many hours of daylight does Keysville have in December?
What time are sunrise and sunset in December in Keysville?
How many hours of sunshine does Keysville have in December?
What are the months with the lowest UV index in Keysville?
What is the UV index reading in December in Keysville?
Average temperature in December
Keysville, MD
- Average high temperature in December: 42.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Keysville, MD
- 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
Keysville, MD
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Keysville, MD
- Average humidity in December: 79%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Keysville, MD
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in December
Keysville, MD
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in December
Keysville, MD
- Average snowfall in December: 1.57"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Keysville, MD
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Keysville, MD
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Keysville, MD
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Keysville, MD
- 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
Keysville, MD
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Keysville, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Keysville, Maryland, USA
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