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
During the transition into December, Grantville observes a decrease in the average high-temperature, falling from a chilly 49.5°F (9.7°C) in November to a wintry 39.9°F (4.4°C). Grantville experiences an average low-temperature reading of 28.8°F (-1.8°C) throughout December.Humidity
In Grantville, the average relative humidity in December is 80%.Rainfall
In December, the rain falls for 11 days. Throughout December, 2.68" (68mm) of precipitation is accumulated. In Grantville, Pennsylvania, during the entire year, the rain falls for 166.3 days and collects up to 34.53" (877mm) of precipitation.Snowfall
Months with snowfall in Grantville are January through May, October through December. In Grantville, in December, snow falls for 5.9 days, with typically accumulated 1.97" (50mm) of snow. Throughout the year, there are 32.4 snowfall days, and 16.69" (424mm) of snow is accumulated.Daylight
December has the shortest days of the year in Grantville, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:50 pm EST.
Sunshine
In Grantville, the average sunshine in December is 4.4h.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 minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is December in Grantville?
What is the average humidity in December in Grantville?
How much does it rain in Grantville in December?
How many days does it snow in December in Grantville?
What is the month with the shortest days in Grantville?
How many hours of daylight does Grantville have in December?
When are sunrise and sunset in December in Grantville?
How long on average sun shines in December in Grantville?
When is the lowest UV index in Grantville?
How high is the UV index in December in Grantville?
Average temperature in December
Grantville, PA
- Average high temperature in December: 39.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Grantville, 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
Grantville, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Grantville, PA
- Average humidity in December: 80%
The months with the highest relative humidity are February, May, June and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Grantville, PA
- Average rainfall in December: 2.68"
The wettest months (with the highest rainfall) are May and July (3.58").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in December
Grantville, PA
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Grantville, PA
- Average snowfall in December: 1.97"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grantville, PA
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grantville, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Grantville, PA
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Grantville, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Grantville, PA
- Average cloud cover in December: 53
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Grantville, PA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, July and November (6mi).
The months with the lowest visibility are January, February, May, August, September, October and December (5mi).
Grantville, Pennsylvania, USA
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