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
A moderate decline in the average high-temperature is seen in McKeesport during December, decreasing from a frosty 49.3°F (9.6°C) in November to an icy 39.6°F (4.2°C). Throughout December, McKeesport anticipates an average low-temperature of 28.4°F (-2°C).Humidity
The average relative humidity in December in McKeesport, Pennsylvania, is 83%.Rainfall
In McKeesport, in December, it is raining for 8.5 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, in McKeesport, there are 128 rainfall days, and 10.2" (259mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In McKeesport, Pennsylvania, in December, during 10.1 snowfall days, 1.26" (32mm) of snow is typically accumulated. In McKeesport, during the entire year, snow falls for 50 days and aggregates up to 6.69" (170mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in McKeesport, Pennsylvania.On the first day of December, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:03 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
The month with the lowest UV index in McKeesport is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
Is it cold in McKeesport during December?
What is the average humidity in December in McKeesport?
How many days does it rain in December in McKeesport?
How much does it snow in McKeesport in December?
What is the month with the shortest days in McKeesport?
How many hours of daylight does McKeesport have in December?
When are sunrise and sunset in December in McKeesport?
How many hours of sunshine does McKeesport have in December?
When is the lowest UV index in McKeesport?
What is the UV index reading in December in McKeesport?
Average temperature in December
McKeesport, PA
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
McKeesport, 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
McKeesport, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
McKeesport, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
McKeesport, PA
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are September and November (0.55").
Average rainfall days in December
McKeesport, PA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in December
McKeesport, PA
- Average snowfall in December: 1.26"
The months with the highest snowfall are January and February (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
McKeesport, PA
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
McKeesport, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
McKeesport, PA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
McKeesport, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
McKeesport, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
McKeesport, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
McKeesport, Pennsylvania, USA
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