December weather forecastMattawana, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Mattawana, Pennsylvania, with an average temperature ranging between max 39°F (3.9°C) and min 27.5°F (-2.5°C).Temperature
December's onset corresponds with a shift in the average high-temperature, moving from a chilly 48.4°F (9.1°C) in November to a wintry 39°F (3.9°C). Mattawana experiences a steady low-temperature of 27.5°F (-2.5°C) throughout December.Humidity
The average relative humidity in December is 81%.Rainfall
In Mattawana, Pennsylvania, in December, it is raining for 10.5 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, there are 162 rainfall days, and 28.86" (733mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, in Mattawana, it is snowing for 6 days. Throughout December, 2.76" (70mm) of snow is accumulated. In Mattawana, Pennsylvania, during the entire year, snow falls for 35.2 days and aggregates up to 16.42" (417mm) 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 7:15 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:54 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mattawana, PA
- Average high temperature in December: 39°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 (32.9°F).
- Average low temperature in December: 27.5°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 (19.9°F).
Average pressure in December
Mattawana, 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
Mattawana, PA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Mattawana, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Mattawana, PA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (3.31").
The driest months (with the least rainfall) are January and November (1.85").
Average rainfall days in December
Mattawana, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Mattawana, PA
- Average snowfall in December: 2.76"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mattawana, PA
- Average snowfall days in December: 6 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mattawana, 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: 4h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Mattawana, PA
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in December
Mattawana, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Mattawana, PA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Mattawana, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
