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
A subtle change in temperatures is noted as November gives way to December, with average highs reducing from a cool 50.9°F (10.5°C) to a wintry 42.1°F (5.6°C). Nighttime temperature in Hanover lowers to an average of 29.8°F (-1.2°C) in December.Humidity
In Hanover, Pennsylvania, the average relative humidity in December is 79%.Rainfall
In Hanover, in December, it is raining for 8.3 days, with typically 1.22" (31mm) of accumulated precipitation. In Hanover, during the entire year, the rain falls for 133.6 days and collects up to 17.52" (445mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Hanover, in December, during 3.7 snowfall days, 1.18" (30mm) of snow is typically accumulated. Throughout the year, in Hanover, there are 19.9 snowfall days, and 7.24" (184mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:43 pm. On the last day of December, in Hanover, sunrise is at 7:29 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine is 4.9h.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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Hanover, PA
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Hanover, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Hanover, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Hanover, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Hanover, PA
- Average rainfall in December: 1.22"
The wettest months (with the highest rainfall) are July and August (2.01").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Hanover, PA
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in December
Hanover, PA
- Average snowfall in December: 1.18"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Hanover, PA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hanover, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Hanover, PA
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (13.1 days).
Average UV index in December
Hanover, 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
Hanover, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Hanover, 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).
Hanover, Pennsylvania, USA
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