December weather forecastMcDonald, PA
December
Weather in December
The first month of the winter, December, is still a cold month in McDonald, Pennsylvania, with temperature in the range of an average low of 28.4°F (-2°C) and an average high of 39.9°F (4.4°C).Temperature
McDonald experiences a temperature shift at the start of December, with average high-temperatures adjusting from a frosty 49.1°F (9.5°C) in November to an icy 39.9°F (4.4°C). During the nights in December, an average low-temperature of 28.4°F (-2°C) is observed.Humidity
In December, the average relative humidity is 84%.Rainfall
In December, the rain falls for 11.5 days. Throughout December, 2.05" (52mm) of precipitation is accumulated. Throughout the year, there are 170.6 rainfall days, and 25.79" (655mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in McDonald. In December, it is snowing for 11.8 days. Throughout December, 2.6" (66mm) of snow is accumulated. In McDonald, during the entire year, snow falls for 55.6 days and aggregates up to 13.62" (346mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of December, in McDonald, sunrise is at 7:43 am and sunset at 5:04 pm EST.
Sunshine
The average sunshine in December in McDonald is 3.5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in McDonald. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
McDonald, PA
- Average high temperature in December: 39.9°F
The warmest month (with the highest average high temperature) is July (83.5°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 (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
McDonald, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
McDonald, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
McDonald, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (76%).
Average rainfall in December
McDonald, PA
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in December
McDonald, PA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
McDonald, PA
- Average snowfall in December: 2.6"
The month with the highest snowfall is January (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
McDonald, PA
- Average snowfall days in December: 11.8 days
The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
McDonald, PA
- Average daylight in December: 9h and 18min
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 30min
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
McDonald, PA
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
McDonald, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (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
McDonald, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
McDonald, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, August and November (6mi).
The month with the lowest visibility is February (4mi).
