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
The decrease of average high-temperatures is mild in December, with a decline from a frosty 45.5°F (7.5°C) in November to an icy 35.6°F (2°C). Clarks Summit, during December nights, observes an average temperature of 25.7°F (-3.5°C).Humidity
In Clarks Summit, the average relative humidity in December is 84%.Rainfall
In Clarks Summit, in December, it is raining for 11.7 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 165.6 rainfall days, and 30.31" (770mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 13.4 days. Throughout December, 5.94" (151mm) of snow is accumulated. Throughout the year, there are 67.9 snowfall days, and 33.62" (854mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:10 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:43 pm EST.
Sunshine
In Clarks Summit, the average sunshine in December is 3.5h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. 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 average daily UV index of 1 in December transforms into the following instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Clarks Summit?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Clarks Summit?
What is the UV index reading in December in Clarks Summit?
Average temperature in December
Clarks Summit, PA
- Average high temperature in December: 35.6°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 (29.8°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Clarks Summit, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Clarks Summit, PA
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Clarks Summit, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (77%).
Average rainfall in December
Clarks Summit, PA
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is July (3.15").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Clarks Summit, PA
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Clarks Summit, PA
- Average snowfall in December: 5.94"
The month with the highest snowfall is February (9.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Clarks Summit, PA
- Average snowfall days in December: 13.4 days
The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Clarks Summit, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in December
Clarks Summit, PA
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is May (9.3 days).
Average UV index in December
Clarks Summit, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Clarks Summit, PA
- Average cloud cover in December: 65
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Clarks Summit, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Clarks Summit, Pennsylvania, USA
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