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
Stepping into December, Saint Leonard observes a temperature decline, with the average high falling from November's fresh 52°F (11.1°C) to a chilly 42.8°F (6°C). December's average low-temperature reading in Saint Leonard settles at a subzero cold 31.1°F (-0.5°C).Humidity
In December, the average relative humidity is 77%.Rainfall
December is the month with the most rainfall. Rain falls for 10.7 days and accumulates 3.31" (84mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Saint Leonard. In Saint Leonard, Pennsylvania, in December, during 3.6 snowfall days, 1.61" (41mm) of snow is typically accumulated. In Saint Leonard, during the entire year, snow falls for 24 days and aggregates up to 12.13" (308mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December in Saint Leonard, sunrise is at 7:03 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:44 pm EST.
Sunshine
In Saint Leonard, the average sunshine in December 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 estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold is December in Saint Leonard?
What is the average humidity in December in Saint Leonard?
What is the rainiest month in Saint Leonard?
How much does it rain in Saint Leonard in December?
How many days does it snow in December in Saint Leonard?
What is the month with the shortest days in Saint Leonard?
What is the average length of the day in December in Saint Leonard?
When are sunrise and sunset in December in Saint Leonard?
How long on average sun shines in December in Saint Leonard?
When is the lowest UV index in Saint Leonard?
How high is the UV index in December in Saint Leonard?
Average temperature in December
Saint Leonard, PA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Saint Leonard, 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 (29.93"Hg).
Average wind speed in December
Saint Leonard, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Saint Leonard, PA
- Average humidity in December: 77%
The months with the highest relative humidity are February and October (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Saint Leonard, PA
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Saint Leonard, PA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Saint Leonard, PA
- Average snowfall in December: 1.61"
The month with the highest snowfall is March (3.78").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Leonard, PA
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Leonard, 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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Saint Leonard, PA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in December
Saint Leonard, 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
Saint Leonard, PA
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Saint Leonard, 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).
Saint Leonard, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location
