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 the onset of December, Delmont experiences a modest temperature adjustment, with the average high-temperature receding from a frosty 48.9°F (9.4°C) in November to a cold 39°F (3.9°C). During the December nights, an average temperature of 27.7°F (-2.4°C) is observed.Humidity
The average relative humidity in December is 84%.Rainfall
In December, the rain falls for 13.1 days. Throughout December, 2.99" (76mm) of precipitation is accumulated. In Delmont, Pennsylvania, during the entire year, the rain falls for 183.8 days and collects up to 35.16" (893mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Delmont, in December, snow falls for 13.5 days, with typically accumulated 5.75" (146mm) of snow. Throughout the year, there are 65 snowfall days, and 28.98" (736mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:22 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:01 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Delmont in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Delmont have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Delmont, PA
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Delmont, PA
- Average pressure in December: 30.11"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
Delmont, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Delmont, PA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Delmont, PA
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in December
Delmont, PA
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in December
Delmont, PA
- Average snowfall in December: 5.75"
The month with the highest snowfall is January (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Delmont, PA
- Average snowfall days in December: 13.5 days
The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Delmont, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Delmont, PA
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is November (14 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in December
Delmont, PA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Delmont, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Delmont, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Delmont, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location