December weather forecastLewistown, PA
December
Weather in December
December, the first month of the winter in Lewistown, is still a cold month, with an average temperature ranging between max 39°F (3.9°C) and min 27.5°F (-2.5°C).Temperature
As December arrives, Lewistown's weather displays a decrease in high-temperatures, transitioning from November's chilly 48.4°F (9.1°C) to a wintry 39°F (3.9°C). During the nights in December, Lewistown experiences a consistent average temperature of 27.5°F (-2.5°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Lewistown, in December, during 10.5 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. 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 December, during 6 snowfall days, 2.76" (70mm) of snow is typically accumulated. In Lewistown, during the entire year, snow falls for 35.2 days and aggregates up to 16.42" (417mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:53 pm EST.
Sunshine
The average sunshine in December in Lewistown is 4.1h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 18min
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 6min
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).
