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
Annville's December weather shows a moderate shift in high-temperatures, falling from November's frosty 49.5°F (9.7°C) to a cold 40.3°F (4.6°C). An average low-temperature of 29.3°F (-1.5°C) marks the nights in Annville, Pennsylvania throughout December.Humidity
The average relative humidity in December is 80%.Rainfall
In Annville, during December, the rain falls for 9.2 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Annville, during the entire year, the rain falls for 137.4 days and collects up to 16.26" (413mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, in Annville, it is snowing for 3.3 days. Throughout December, 0.98" (25mm) of snow is accumulated. In Annville, during the entire year, snow falls for 19.5 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 December in Annville, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:50 pm EST.
Sunshine
In Annville, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
How cold is it in Annville in December?
What is the average humidity in December in Annville?
How much does it rain in Annville in December?
How much does it snow in Annville in December?
What is the month with the shortest days in Annville?
How many hours of daylight does Annville have in December?
What time are sunrise and sunset in December in Annville?
How many hours of sunshine does Annville have in December?
What is the month with the lowest UV index in Annville?
What is the UV index intensity in December in Annville?
Average temperature in December
Annville, PA
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 29.3°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 (21.6°F).
Average pressure in December
Annville, 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
Annville, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Annville, PA
- Average humidity in December: 80%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Annville, PA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in December
Annville, PA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in December
Annville, PA
- Average snowfall in December: 0.98"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Annville, PA
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Annville, 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 24min).
- 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
Annville, PA
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Annville, PA
- Average UV index in December: 2
The months with the highest UV index are May, 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
Annville, 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
Annville, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Annville, Pennsylvania, USA
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