December weather forecastHatfield, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Hatfield, Pennsylvania, with an average temperature fluctuating between 42.1°F (5.6°C) and 30.7°F (-0.7°C).Temperature
December implies a gentle temperature shift, with average high-temperatures reducing from November's fresh 51.3°F (10.7°C) to a wintry 42.1°F (5.6°C). During December, Hatfield's temperature falls to a steady low-temperature average of 30.7°F (-0.7°C).Humidity
February, October and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Hatfield, in December, it is raining for 7.3 days, with typically 1.02" (26mm) of accumulated precipitation. In Hatfield, during the entire year, the rain falls for 116.6 days and collects up to 10.63" (270mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Hatfield, in December, during 1.8 snowfall days, 0.43" (11mm) of snow is typically accumulated. In Hatfield, during the entire year, snow falls for 14.8 days and aggregates up to 3.5" (89mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Hatfield.On the first day of December, sunrise is at 7:05 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:45 pm EST.
Sunshine
In December, the average sunshine is 5h.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 low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hatfield, PA
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Hatfield, 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
Hatfield, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Hatfield, PA
- Average humidity in December: 79%
The months with the highest relative humidity are February, October and December (79%).
The months with the lowest relative humidity are April, July and August (73%).
Average rainfall in December
Hatfield, PA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is September (0.59").
Average rainfall days in December
Hatfield, PA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (13.8 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in December
Hatfield, PA
- Average snowfall in December: 0.43"
The month with the highest snowfall is March (1.02").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Hatfield, PA
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is January (4.6 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
Hatfield, PA
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Hatfield, PA
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is July (13.9 days).
Average UV index in December
Hatfield, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (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
Hatfield, PA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Hatfield, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
