December weather forecastOption, PA
December
Weather in December
December, the first month of the winter in Option, is still a cold month, with an average temperature ranging between min 28.4°F (-2°C) and max 39.6°F (4.2°C).Temperature
Observing a mild shift, the average high-temperature during December reduces from November's frosty 49.3°F (9.6°C) to an icy 39.6°F (4.2°C). Option's average low-temperature during December nights is observed to be a subzero cold 28.4°F (-2°C).Humidity
The average relative humidity in December is 83%.Rainfall
In Option, in December, it is raining for 8.5 days, with typically 0.79" (20mm) of accumulated precipitation. In Option, Pennsylvania, during the entire year, the rain falls for 128 days and collects up to 10.2" (259mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 10.1 days. Throughout December, 1.26" (32mm) of snow is accumulated. In Option, 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.On the first day of the month, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of December, in Option, Pennsylvania, sunrise is at 7:42 am and sunset at 5:03 pm EST.
Sunshine
In Option, the average sunshine in December is 3.4h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Option, 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
Option, 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
Option, 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
Option, 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
Option, 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
Option, 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
Option, 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
Option, 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
Option, 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: 3h and 24min
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
Option, 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
Option, 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
Option, 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
Option, 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).
