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
As November shifts into December, a minor alteration in temperatures is observed, with average highs reducing from a fresh 50.9°F (10.5°C) to a cold 42.4°F (5.8°C). In Harper, December is marked by an average low-temperature of 30.4°F (-0.9°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Harper, in December, it is raining for 12.5 days, with typically 3.5" (89mm) of accumulated precipitation. In Harper, during the entire year, the rain falls for 189.8 days and collects up to 36.54" (928mm) of precipitation.Snowfall
Months with snowfall in Harper are January through May, October through December. In Harper, in December, snow falls for 12 days, with typically accumulated 7.36" (187mm) of snow. In Harper, during the entire year, snow falls for 60.8 days and aggregates up to 39.41" (1001mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 5:06 pm. On the last day of December, sunrise is at 7:40 am and sunset at 5:16 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
The months with the lowest UV index in Harper are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Experience reduced UV exposure by about half when donning a wide-brim hat. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Harper during December?
What is the average humidity in December in Harper?
How much does it rain in Harper in December?
How much does it snow in Harper in December?
What is the month with the shortest days in Harper?
How many hours of daylight does Harper have in December?
What time are sunrise and sunset in December in Harper?
How long on average sun shines in December in Harper?
When is the lowest UV index in Harper?
How high is the UV index in December in Harper?
Average temperature in December
Harper, WV
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in December
Harper, WV
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Harper, WV
- Average wind speed in December: 6.8mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Harper, WV
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are April, June, July, August and November (78%).
Average rainfall in December
Harper, WV
- Average rainfall in December: 3.5"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Harper, WV
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (11.4 days).
Average snowfall in December
Harper, WV
- Average snowfall in December: 7.36"
The month with the highest snowfall is January (8.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harper, WV
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harper, WV
- 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 36min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Harper, WV
- Average sunshine days in December: 10.7 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is May (7 days).
Average UV index in December
Harper, WV
- Average UV index in December: 2
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Harper, WV
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Harper, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February and September (4mi).
Harper, West Virginia, USA
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