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 arrival of December correlates with a minor temperature reduction, down from November's cool 51.1°F (10.6°C) to an icy 42.3°F (5.7°C). Throughout December, the nighttime temperature in Napier averages to a freezing cold 30.6°F (-0.8°C).Humidity
The average relative humidity in December is 81%.Rainfall
In Napier, in December, it is raining for 14.1 days, with typically 3.5" (89mm) of accumulated precipitation. In Napier, during the entire year, the rain falls for 195.1 days and collects up to 38.98" (990mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 12 days. Throughout December, 6.46" (164mm) of snow is accumulated. In Napier, during the entire year, snow falls for 58.6 days and aggregates up to 34.25" (870mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 5:01 pm. On the last day of December, in Napier, sunrise is at 7:40 am and sunset at 5:10 pm EST.
Sunshine
In Napier, the average sunshine in December is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Napier. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Napier?
What is the average humidity in December in Napier?
How many days does it rain in December in Napier?
How many days does it snow in December in Napier?
What is the month with the shortest days in Napier?
What is the average length of the day in December in Napier?
When are sunrise and sunset in December in Napier?
How long on average sun shines in December in Napier?
What is the month with the lowest UV index in Napier?
What is the UV index reading in December in Napier?
Average temperature in December
Napier, WV
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Napier, WV
- 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 (29.97"Hg).
Average wind speed in December
Napier, WV
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Napier, WV
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, August and November (77%).
Average rainfall in December
Napier, WV
- Average rainfall in December: 3.5"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Napier, WV
- Average rainfall days in December: 14.1 days
The month with the highest number of rainy days is May (21.5 days).
The month with the least rainy days is February (12.9 days).
Average snowfall in December
Napier, WV
- Average snowfall in December: 6.46"
The month with the highest snowfall is January (8.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Napier, WV
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (16.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Napier, WV
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Napier, WV
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is October (14.3 days).
The months with the least sunshine days are January and February (7.3 days).
Average UV index in December
Napier, WV
- Average UV index in December: 2
The months with the highest UV index are July 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
Napier, WV
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Napier, WV
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Napier, West Virginia, USA
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