December weather forecastMontgomery, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Montgomery, Pennsylvania, with an average temperature fluctuating between 27°F (-2.8°C) and 37°F (2.8°C).Temperature
Montgomery's December weather shows a moderate shift in high-temperatures, falling from November's frosty 46.9°F (8.3°C) to a cold 37°F (2.8°C). During the month of December, Montgomery experiences a steady low-temperature average of 27°F (-2.8°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Montgomery, in December, it is raining for 12.7 days, with typically 1.93" (49mm) of accumulated precipitation. In Montgomery, Pennsylvania, during the entire year, the rain falls for 168 days and collects up to 27.32" (694mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 10 days. Throughout December, 2.95" (75mm) of snow is accumulated. Throughout the year, there are 48.3 snowfall days, and 17.68" (449mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:14 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:32 am and sunset at 4:48 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Consider carefully! The reflective quality of snow can almost 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
Montgomery, PA
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Montgomery, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Montgomery, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Montgomery, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Montgomery, PA
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is November (1.77").
Average rainfall days in December
Montgomery, PA
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (9.7 days).
Average snowfall in December
Montgomery, PA
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Montgomery, PA
- Average snowfall days in December: 10 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Montgomery, PA
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in December
Montgomery, PA
- Average sunshine days in December: 13.4 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is February (10 days).
Average UV index in December
Montgomery, 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, October, November and December (UV index 2).
Average cloud cover in December
Montgomery, PA
- Average cloud cover in December: 58
The months with the most cloud cover are January, February and December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Montgomery, 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).
