December weather forecastHerman, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Herman, Pennsylvania, with an average temperature varying between 27.1°F (-2.7°C) and 38.3°F (3.5°C).Temperature
Transition into December marks a drop in the average high-temperature, moving from a frosty 48.2°F (9°C) in November to a wintry 38.3°F (3.5°C). During December, the average low-temperature is a subzero cold 27.1°F (-2.7°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In December, in Herman, the rain falls for 12.2 days. Throughout December, 2.87" (73mm) of precipitation is accumulated. Throughout the year, there are 182.7 rainfall days, and 36.18" (919mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Herman, in December, snow falls for 14 days, with typically accumulated 4.88" (124mm) of snow. In Herman, during the entire year, snow falls for 67 days and aggregates up to 26.54" (674mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:24 am and sunset at 4:52 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:01 pm EST.
Sunshine
In Herman, the average sunshine in December is 3.1h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 1 during December translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Herman, PA
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Herman, 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 (29.94"Hg).
Average wind speed in December
Herman, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Herman, PA
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Herman, PA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is April (3.74").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in December
Herman, PA
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is February (10 days).
Average snowfall in December
Herman, PA
- Average snowfall in December: 4.88"
The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Herman, PA
- Average snowfall days in December: 14 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Herman, PA
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Herman, PA
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is November (13.7 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Herman, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Herman, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Herman, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
