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 December's onset, the average high-temperature recedes from November's chilly 48.4°F (9.1°C) to a wintry 39°F (3.9°C). An average low-temperature of 27.5°F (-2.5°C) is observed during the December nights.Humidity
In December, the average relative humidity is 81%.Rainfall
In Lewistown, during December, the rain falls for 10.5 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Lewistown, during the entire year, the rain falls for 162 days and collects up to 28.86" (733mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Lewistown. In Lewistown, during December, snow falls for 6 days and regularly aggregates up to 2.76" (70mm) of snow. In Lewistown, during the entire year, snow falls for 35.2 days and aggregates up to 16.42" (417mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Lewistown.On the first day of December, sunrise is at 7:15 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine is 4.1h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Lewistown. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
Is December cold in Lewistown?
What is the average humidity in December in Lewistown?
How many days does it rain in December in Lewistown?
How many days does it snow in December in Lewistown?
What is the month with the shortest days in Lewistown?
What is the average length of the day in December in Lewistown?
What time are sunrise and sunset in December in Lewistown?
How many hours of sunshine does Lewistown have in December?
What is the month with the lowest UV index in Lewistown?
What is the UV index intensity in December in Lewistown?
Average temperature in December
Lewistown, PA
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Lewistown, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Lewistown, PA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Lewistown, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Lewistown, PA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (3.31").
The driest months (with the least rainfall) are January and November (1.85").
Average rainfall days in December
Lewistown, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Lewistown, PA
- Average snowfall in December: 2.76"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lewistown, PA
- Average snowfall days in December: 6 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lewistown, 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 18min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Lewistown, PA
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in December
Lewistown, PA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Lewistown, PA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Lewistown, 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).
Lewistown, Pennsylvania, USA
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