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
December implies a gentle temperature shift, with average high-temperatures reducing from November's frosty 48.4°F (9.1°C) to a wintry 38.7°F (3.7°C). Throughout the December nights, Leechburg encounters a low-temperature of 27.3°F (-2.6°C).Humidity
The average relative humidity in December is 84%.Rainfall
In Leechburg, Pennsylvania, during December, the rain falls for 10.1 days and regularly aggregates up to 1.38" (35mm) of precipitation. In Leechburg, during the entire year, the rain falls for 147.1 days and collects up to 18.54" (471mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 9.1 days. Throughout December, 2.2" (56mm) of snow is accumulated. In Leechburg, during the entire year, snow falls for 45.9 days and aggregates up to 11.3" (287mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:01 pm EST.
Sunshine
The average sunshine in December is 3.1h.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 hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a regular UV index of 1 translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time 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
Leechburg, PA
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Leechburg, PA
- Average pressure in December: 30.1"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
Leechburg, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Leechburg, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Leechburg, PA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in December
Leechburg, PA
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (17.6 days).
The months with the least rainy days are January and February (7.8 days).
Average snowfall in December
Leechburg, PA
- Average snowfall in December: 2.2"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Leechburg, PA
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Leechburg, 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 1min
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 48min).
Average sunshine days in December
Leechburg, PA
- Average sunshine days in December: 14 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is May (10 days).
Average UV index in December
Leechburg, 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
Leechburg, PA
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Leechburg, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Leechburg, Pennsylvania, USA
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