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
Blue Knob in December demonstrates a small temperature transition, adjusting from an average high of a frosty 46.8°F (8.2°C) in November to an icy 37.2°F (2.9°C). Throughout the month of December, Blue Knob reports a steady low-temperature average of 26.8°F (-2.9°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Blue Knob, in December, during 9.7 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, there are 162.4 rainfall days, and 30" (762mm) of precipitation is accumulated.Snowfall
Months with snowfall in Blue Knob, Pennsylvania, are January through May, October through December. In Blue Knob, during December, snow falls for 8.6 days and regularly aggregates up to 3.7" (94mm) of snow. Throughout the year, in Blue Knob, there are 47.1 snowfall days, and 24.8" (630mm) of snow is accumulated.Daylight
December has the shortest days of the year in Blue Knob, with an average of 9h and 24min of daylight.On the first day of December in Blue Knob, sunrise is at 7:18 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:58 pm EST.
Sunshine
In December, the average sunshine in Blue Knob is 3.9h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is December in Blue Knob?
What is the average humidity in December in Blue Knob?
How many days does it rain in December in Blue Knob?
How many days does it snow in December in Blue Knob?
What is the month with the shortest days in Blue Knob?
How many hours of daylight does Blue Knob have in December?
When are sunrise and sunset in December in Blue Knob?
How long on average sun shines in December in Blue Knob?
What is the month with the lowest UV index in Blue Knob?
How high is the UV index in December in Blue Knob?
Average temperature in December
Blue Knob, PA
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Blue Knob, PA
- 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
Blue Knob, PA
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Blue Knob, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is July (77%).
Average rainfall in December
Blue Knob, PA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in December
Blue Knob, PA
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in December
Blue Knob, PA
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Blue Knob, PA
- Average snowfall days in December: 8.6 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Blue Knob, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Blue Knob, PA
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Blue Knob, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Blue Knob, PA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Blue Knob, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Blue Knob, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location
