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
The average high-temperature slightly decreases in December, shifting from a mild 56.8°F (13.8°C) in November to a chilly 49.5°F (9.7°C). Throughout December, Harpers experiences a low-temperature average of 35.1°F (1.7°C).Humidity
The most humid month is December, with an average relative humidity of 78%.Rainfall
In Harpers, in December, it is raining for 10.5 days, with typically 2.36" (60mm) of accumulated precipitation. Throughout the year, there are 153.1 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
Months with snowfall in Harpers are January through April, October through December. In December, in Harpers, it is snowing for 1.3 days. Throughout December, 1.65" (42mm) of snow is accumulated. In Harpers, Virginia, during the entire year, snow falls for 10.5 days and aggregates up to 8.23" (209mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:06 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:24 am and sunset at 5:04 pm EST.
Sunshine
December has the least sunshine of the year in Harpers, Virginia, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Harpers?
What is the most humid month in Harpers?
What is the average humidity in December in Harpers?
How many days does it rain in December in Harpers?
How many days does it snow in December in Harpers?
What is the month with the shortest days in Harpers?
What is the average length of the day in December in Harpers?
When are sunrise and sunset in December in Harpers?
What is the month with the least sunshine in Harpers?
How long on average sun shines in December in Harpers?
When is the lowest UV index in Harpers?
What is the UV index reading in December in Harpers?
Average temperature in December
Harpers, VA
- Average high temperature in December: 49.5°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 35.1°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in December
Harpers, VA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Harpers, VA
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Harpers, VA
- Average humidity in December: 78%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Harpers, VA
- Average rainfall in December: 2.36"
The wettest months (with the highest rainfall) are March, May and November (2.68").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Harpers, VA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Harpers, VA
- Average snowfall in December: 1.65"
The month with the highest snowfall is March (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Harpers, VA
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (3.5 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
Harpers, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Harpers, VA
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Harpers, VA
- 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 and December (UV index 2).
Average cloud cover in December
Harpers, VA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Harpers, VA
- 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).
Harpers, Virginia, USA
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