December weather forecastRouzerville, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Rouzerville, Pennsylvania, with an average temperature fluctuating between 29.1°F (-1.6°C) and 41.2°F (5.1°C).Temperature
Rouzerville's weather changes with the onset of December, slightly falling from a fresh 50.2°F (10.1°C) in November to a wintry 41.2°F (5.1°C). Throughout December nights, Rouzerville registers an average low-temperature of 29.1°F (-1.6°C).Humidity
In Rouzerville, the average relative humidity in December is 79%.Rainfall
In Rouzerville, in December, during 10.5 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Rouzerville, during the entire year, the rain falls for 158.5 days and collects up to 31.3" (795mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Rouzerville, in December, snow falls for 6.1 days, with typically accumulated 2.99" (76mm) of snow. Throughout the year, there are 33 snowfall days, and 22.44" (570mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 4:46 pm. On the last day of December, in Rouzerville, sunrise is at 7:31 am and sunset at 4:55 pm EST.
Sunshine
In December, the average sunshine in Rouzerville is 4.7h.UV index
The months with the lowest UV index in Rouzerville, Pennsylvania, are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rouzerville, PA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Rouzerville, 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
Rouzerville, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Rouzerville, PA
- Average humidity in December: 79%
The month with the highest relative humidity is October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Rouzerville, PA
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Rouzerville, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Rouzerville, PA
- Average snowfall in December: 2.99"
The month with the highest snowfall is January (6.81").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rouzerville, PA
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rouzerville, PA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Rouzerville, PA
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in December
Rouzerville, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Rouzerville, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Rouzerville, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June and July (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October, November and December (5mi).
