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
Setting in of December comes with a decrease in the average high-temperature, moving from a fresh 50°F (10°C) in November to a wintry 40.3°F (4.6°C). During the nights in December, an average low-temperature of 28.9°F (-1.7°C) is observed.Humidity
In December, the average relative humidity in Macungie, Pennsylvania, is 80%.Rainfall
In Macungie, during December, the rain falls for 10.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 156.9 rainfall days, and 33.15" (842mm) of precipitation is accumulated.Snowfall
Months with snowfall in Macungie are January through May, October through December. In December, it is snowing for 5.2 days. Throughout December, 2.87" (73mm) of snow is accumulated. Throughout the year, in Macungie, Pennsylvania, there are 31.2 snowfall days, and 18.98" (482mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Macungie, Pennsylvania.On the first day of December in Macungie, Pennsylvania, sunrise is at 7:06 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Macungie is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Macungie. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 2 in December leads to these guidelines:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
Is it cold in Macungie during December?
What is the average humidity in December in Macungie?
How many days does it rain in December in Macungie?
How much does it snow in Macungie in December?
What is the month with the shortest days in Macungie?
What is the average length of the day in December in Macungie?
What time are sunrise and sunset in December in Macungie?
How many hours of sunshine does Macungie have in December?
When is the lowest UV index in Macungie?
What is the UV index reading in December in Macungie?
Average temperature in December
Macungie, PA
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in December
Macungie, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Macungie, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Macungie, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Macungie, PA
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Macungie, PA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in December
Macungie, PA
- Average snowfall in December: 2.87"
The month with the highest snowfall is March (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Macungie, PA
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Macungie, 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 4min
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 18min).
Average sunshine days in December
Macungie, PA
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Macungie, PA
- Average UV index in December: 2
The months with the highest UV index are June and July (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
Macungie, PA
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Macungie, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).
Macungie, Pennsylvania, USA
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