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 arrival, Milroy's weather changes as the average high-temperature falls from a chilly 47.5°F (8.6°C) in November to an icy 38.1°F (3.4°C). Milroy, during the month of December, experiences an average low-temperature of 27.1°F (-2.7°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Milroy, in December, during 8.1 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. In Milroy, during the entire year, the rain falls for 132.8 days and collects up to 17.36" (441mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Milroy. In December, in Milroy, it is snowing for 4.8 days. Throughout December, 1.61" (41mm) of snow is accumulated. In Milroy, Pennsylvania, during the entire year, snow falls for 28.7 days and aggregates up to 9.76" (248mm) 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 7:15 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine is 4.1h.UV index
The months with the lowest UV index in Milroy are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. 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 it cold during December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Milroy have in December?
What are the months with the lowest UV index?
What is the UV index reading in December in Milroy?
Average temperature in December
Milroy, PA
- Average high temperature in December: 38.1°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 (32.2°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Milroy, 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
Milroy, 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 (4.5mph).
Average humidity in December
Milroy, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Milroy, PA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in December
Milroy, PA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (6 days).
Average snowfall in December
Milroy, PA
- Average snowfall in December: 1.61"
The months with the highest snowfall are January and February (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Milroy, PA
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Milroy, 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: 3h and 54min).
Average sunshine days in December
Milroy, PA
- Average sunshine days in December: 20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in December
Milroy, 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
Milroy, PA
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Milroy, 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).
Milroy, Pennsylvania, USA
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