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 comes with a decrease in the average high-temperature, falling from a chilly 43.3°F (6.3°C) in November to a cold 33.4°F (0.8°C). An average temperature of 23.7°F (-4.6°C) marks the nights in December.Humidity
In December, the average relative humidity is 87%.Rainfall
In Oswayo, in December, during 10.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 168.4 rainfall days, and 31.57" (802mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Oswayo, it is snowing for 19.6 days. Throughout December, 9.96" (253mm) of snow is accumulated. Throughout the year, there are 98.2 snowfall days, and 52.05" (1322mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:20 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:39 am and sunset at 4:51 pm EST.
Sunshine
In Oswayo, Pennsylvania, the average sunshine in December is 2.7h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 1 during December translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index in Oswayo?
What is the UV index reading in December?
Average temperature in December
Oswayo, PA
- Average high temperature in December: 33.4°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in December: 23.7°F
The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in December
Oswayo, 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 (29.94"Hg).
Average wind speed in December
Oswayo, PA
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Oswayo, PA
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June and July (78%).
Average rainfall in December
Oswayo, PA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is April (3.62").
The driest month (with the least rainfall) is August (2.09").
Average rainfall days in December
Oswayo, PA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in December
Oswayo, PA
- Average snowfall in December: 9.96"
The month with the highest snowfall is February (12.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Oswayo, PA
- Average snowfall days in December: 19.6 days
The month with the highest number of snowfall days is January (21.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Oswayo, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Oswayo, PA
- Average sunshine days in December: 5.9 days
The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (4.7 days).
Average UV index in December
Oswayo, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Oswayo, PA
- Average cloud cover in December: 75
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in December
Oswayo, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, September and December (4mi).
Oswayo, Pennsylvania, USA
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