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's onset introduces a mild reduction in the average high-temperature, from a cool 50.2°F (10.1°C) in November to a cold 41.5°F (5.3°C). Knottsville's average low-temperature for the month of December records at a freezing cold 29.5°F (-1.4°C).Humidity
In Knottsville, the average relative humidity in December is 82%.Rainfall
In Knottsville, in December, during 13.7 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. In Knottsville, during the entire year, the rain falls for 184.5 days and collects up to 35.35" (898mm) of precipitation.Snowfall
Months with snowfall in Knottsville, West Virginia, are January through May, October through December. In December, it is snowing for 11.5 days. Throughout December, 4.96" (126mm) of snow is accumulated. Throughout the year, there are 58.4 snowfall days, and 31.26" (794mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Knottsville.On the first day of December, sunrise is at 7:21 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:06 pm EST.
Sunshine
In December, the average sunshine in Knottsville is 3.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Knottsville. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
Is it cold in Knottsville during December?
What is the average humidity in December in Knottsville?
How much does it rain in Knottsville in December?
How much does it snow in Knottsville in December?
What is the month with the shortest days in Knottsville?
What is the average length of the day in December in Knottsville?
What time are sunrise and sunset in December in Knottsville?
How many hours of sunshine does Knottsville have in December?
What is the month with the lowest UV index in Knottsville?
What is the UV index reading in December in Knottsville?
Average temperature in December
Knottsville, WV
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Knottsville, WV
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Knottsville, WV
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Knottsville, WV
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in December
Knottsville, WV
- Average rainfall in December: 3.19"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Knottsville, WV
- Average rainfall days in December: 13.7 days
The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is February (11.9 days).
Average snowfall in December
Knottsville, WV
- Average snowfall in December: 4.96"
The month with the highest snowfall is January (7.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Knottsville, WV
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Knottsville, WV
- 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: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Knottsville, WV
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is October (13.7 days).
The month with the least sunshine days is January (6.5 days).
Average UV index in December
Knottsville, WV
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Knottsville, WV
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Knottsville, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Knottsville, West Virginia, USA
Weather forecast for your location
2. Allow the app to use your location