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
The decrease of average high-temperatures is mild in December, with a decline from a cool 50°F (10°C) in November to a wintry 40.1°F (4.5°C). Hellertown, in December, experiences an average temperature of 28.8°F (-1.8°C) at night.Humidity
The average relative humidity in December in Hellertown, Pennsylvania, is 80%.Rainfall
In Hellertown, in December, during 10.7 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Hellertown, during the entire year, the rain falls for 153 days and collects up to 26.81" (681mm) of precipitation.Snowfall
Months with snowfall in Hellertown are January through May, October through December. In December, it is snowing for 4.8 days. Throughout December, 2.48" (63mm) of snow is accumulated. In Hellertown, during the entire year, snow falls for 26.7 days and aggregates up to 14.49" (368mm) of snow.Daylight
The month with the shortest days in Hellertown is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:35 pm. On the last day of December, in Hellertown, sunrise is at 7:24 am and sunset at 4:44 pm EST.
Sunshine
In December, the average sunshine is 4.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hellertown. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
Is December cold in Hellertown?
What is the average humidity in December in Hellertown?
How many days does it rain in December in Hellertown?
How much does it snow in Hellertown in December?
What is the month with the shortest days in Hellertown?
What is the average length of the day in December in Hellertown?
When is the sunrise / sunset in December in Hellertown?
How many hours of sunshine does Hellertown have in December?
When is the lowest UV index in Hellertown?
What is the UV index reading in December in Hellertown?
Average temperature in December
Hellertown, PA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Hellertown, 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
Hellertown, 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 (5mph).
Average humidity in December
Hellertown, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in December
Hellertown, PA
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is July (2.91").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Hellertown, PA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Hellertown, PA
- Average snowfall in December: 2.48"
The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hellertown, PA
- Average snowfall days in December: 4.8 days
The months with the highest number of snowfall days are January and February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hellertown, 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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Hellertown, PA
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Hellertown, 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, March, November and December (UV index 2).
Average cloud cover in December
Hellertown, 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 34).
Average visibility in December
Hellertown, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September, October and December (5mi).
Hellertown, Pennsylvania, USA
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