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's arrival correlates with a reduction in the average high-temperature, down from a frosty 49.8°F (9.9°C) in November to a wintry 40.1°F (4.5°C). During December, Sally Ann's temperature falls to a steady low-temperature average of 29.1°F (-1.6°C).Humidity
The average relative humidity in December in Sally Ann is 80%.Rainfall
In Sally Ann, Pennsylvania, during December, the rain falls for 10.1 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Sally Ann, during the entire year, the rain falls for 147.9 days and collects up to 25.94" (659mm) of precipitation.Snowfall
Months with snowfall in Sally Ann are January through April, October through December. In Sally Ann, during December, snow falls for 4.5 days and regularly aggregates up to 1.5" (38mm) of snow. In Sally Ann, Pennsylvania, during the entire year, snow falls for 24.9 days and aggregates up to 13.54" (344mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:07 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:46 pm EST.
Sunshine
In Sally Ann, Pennsylvania, the average sunshine in December is 4.7h.UV index
The months with the lowest UV index in Sally Ann are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Experience reduced UV exposure by about half when donning a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
Is it cold in Sally Ann during December?
What is the average humidity in December in Sally Ann?
How many days does it rain in December in Sally Ann?
How much does it snow in Sally Ann in December?
What is the month with the shortest days in Sally Ann?
What is the average length of the day in December in Sally Ann?
When are sunrise and sunset in December in Sally Ann?
How many hours of sunshine does Sally Ann have in December?
What is the month with the lowest UV index in Sally Ann?
How high is the UV index in December in Sally Ann?
Average temperature in December
Sally Ann, PA
- Average high temperature in December: 40.1°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 (34.3°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Sally Ann, 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
Sally Ann, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Sally Ann, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Sally Ann, PA
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Sally Ann, PA
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in December
Sally Ann, PA
- Average snowfall in December: 1.5"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Sally Ann, PA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sally Ann, PA
- Average daylight in December: 9h and 2min
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 4min
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
Sally Ann, PA
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Sally Ann, PA
- Average UV index in December: 2
The months with the highest UV index are 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
Sally Ann, PA
- Average cloud cover in December: 51
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Sally Ann, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, June, July and November (6mi).
The months with the lowest visibility are February, May, August, September, October and December (5mi).
Sally Ann, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location
