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 arrival correlates with a reduction in the average high-temperature, down from a chilly 43.3°F (6.3°C) in November to a cold 34°F (1.1°C). During December, an average low-temperature of 23.9°F (-4.5°C) is observed.Humidity
The average relative humidity in December is 88%.Rainfall
In Lewis Run, during December, the rain falls for 10 days and regularly aggregates up to 3.15" (80mm) of precipitation. In Lewis Run, during the entire year, the rain falls for 176.7 days and collects up to 34.76" (883mm) of precipitation.Snowfall
Months with snowfall in Lewis Run are January through May, October through December. In Lewis Run, Pennsylvania, in December, snow falls for 20.7 days, with typically accumulated 12.17" (309mm) of snow. In Lewis Run, during the entire year, snow falls for 103 days and aggregates up to 61.22" (1555mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:44 pm. On the last day of December, in Lewis Run, sunrise is at 7:42 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine in Lewis Run is 2.5h.UV index
The months with the lowest UV index in Lewis Run are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
How cold is it in Lewis Run in December?
What is the average humidity in December in Lewis Run?
How many days does it rain in December in Lewis Run?
How many days does it snow in December in Lewis Run?
What is the month with the shortest days in Lewis Run?
What is the average length of the day in December in Lewis Run?
What time are sunrise and sunset in December in Lewis Run?
How many hours of sunshine does Lewis Run have in December?
When is the lowest UV index in Lewis Run?
What is the UV index reading in December in Lewis Run?
Average temperature in December
Lewis Run, PA
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in December
Lewis Run, 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
Lewis Run, PA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Lewis Run, PA
- Average humidity in December: 88%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in December
Lewis Run, PA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is April (3.94").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in December
Lewis Run, PA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8 days).
Average snowfall in December
Lewis Run, PA
- Average snowfall in December: 12.17"
The month with the highest snowfall is February (13.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lewis Run, PA
- Average snowfall days in December: 20.7 days
The month with the highest number of snowfall days is January (23 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lewis Run, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Lewis Run, PA
- Average sunshine days in December: 5.5 days
The month with the most sunshine days is September (12.2 days).
The month with the least sunshine days is January (4.8 days).
Average UV index in December
Lewis Run, PA
- Average UV index in December: 1
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 and December (UV index 1).
Average cloud cover in December
Lewis Run, PA
- Average cloud cover in December: 77
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in December
Lewis Run, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
Lewis Run, Pennsylvania, USA
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