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 brings a decrease in the average high-temperature, falling from November's chilly 49.3°F (9.6°C) to an icy 39.6°F (4.2°C). Millersburg usually reports an average low-temperature of 28.6°F (-1.9°C) during the month of December.Humidity
In Millersburg, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 8.8 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. Throughout the year, there are 132.6 rainfall days, and 14.53" (369mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Millersburg, during December, snow falls for 5.1 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, there are 27.1 snowfall days, and 5.67" (144mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:12 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:51 pm EST.
Sunshine
In Millersburg, Pennsylvania, the average sunshine in December is 4.4h.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 ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Millersburg have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Millersburg have in December?
What is the month with the lowest UV index?
How high is the UV index in December in Millersburg?
Average temperature in December
Millersburg, PA
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Millersburg, 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
Millersburg, PA
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Millersburg, PA
- Average humidity in December: 79%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall in December
Millersburg, PA
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is July (1.77").
The driest months (with the least rainfall) are February and November (0.87").
Average rainfall days in December
Millersburg, PA
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Millersburg, PA
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Millersburg, PA
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Millersburg, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Millersburg, PA
- Average sunshine days in December: 18 days
The month with the most sunshine days is November (20 days).
The months with the least sunshine days are May and July (12.8 days).
Average UV index in December
Millersburg, 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
Millersburg, PA
- Average cloud cover in December: 54
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Millersburg, PA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
Millersburg, Pennsylvania, USA
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