December weather forecastUpper Octoraro, PA
December
Weather in December
The first month of the winter, December, is also an icy month in Upper Octoraro, Pennsylvania, with an average temperature fluctuating between 30.6°F (-0.8°C) and 41.9°F (5.5°C).Temperature
Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a cool 50.9°F (10.5°C) to a wintry 41.9°F (5.5°C). An average low-temperature of 30.6°F (-0.8°C) is recorded during the nights in December.Humidity
In December, the average relative humidity in Upper Octoraro is 80%.Rainfall
In Upper Octoraro, in December, it is raining for 8.7 days, with typically 1.54" (39mm) of accumulated precipitation. In Upper Octoraro, during the entire year, the rain falls for 138.3 days and collects up to 19.76" (502mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Upper Octoraro, in December, snow falls for 2.7 days, with typically accumulated 1.14" (29mm) of snow. In Upper Octoraro, during the entire year, snow falls for 19.6 days and aggregates up to 7.64" (194mm) 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 the month, sunrise is at 7:06 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:48 pm EST.
Sunshine
In Upper Octoraro, the average sunshine in December is 4.7h.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 exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Opt for tightly woven and loose clothing to enhance protection from the Sun. 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
Average temperature in December
Upper Octoraro, PA
- Average high temperature in December: 41.9°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 (35.6°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Upper Octoraro, 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 (29.94"Hg).
Average wind speed in December
Upper Octoraro, PA
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are January, February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Upper Octoraro, PA
- Average humidity in December: 80%
The months with the highest relative humidity are May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Upper Octoraro, PA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Upper Octoraro, PA
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Upper Octoraro, PA
- Average snowfall in December: 1.14"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Upper Octoraro, PA
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Upper Octoraro, PA
- Average daylight in December: 9h and 24min
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: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Upper Octoraro, PA
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (12.4 days).
Average UV index in December
Upper Octoraro, 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
Upper Octoraro, PA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Upper Octoraro, 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).
