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
Katy experiences a temperature shift at the start of December, with average high-temperatures adjusting from a cool 50.5°F (10.3°C) in November to an icy 41.5°F (5.3°C). Katy experiences a steady low-temperature of 29.3°F (-1.5°C) throughout December.Humidity
In December, the average relative humidity in Katy is 82%.Rainfall
In Katy, in December, it is raining for 13.1 days, with typically 3.35" (85mm) of accumulated precipitation. In Katy, during the entire year, the rain falls for 188.6 days and collects up to 39.17" (995mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Katy. In Katy, in December, during 10.7 snowfall days, 4.29" (109mm) of snow is typically accumulated. In Katy, during the entire year, snow falls for 52.1 days and aggregates up to 24.21" (615mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Katy, West Virginia.On the first day of the month, sunrise is at 7:22 am and sunset at 4:57 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:07 pm EST.
Sunshine
The average sunshine in December in Katy is 3.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Katy. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during December leads to these advisories:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
How cold does it get in Katy in December?
What is the average humidity in December in Katy?
How many days does it rain in December in Katy?
How much does it snow in Katy in December?
What is the month with the shortest days in Katy?
How many hours of daylight does Katy have in December?
What time are sunrise and sunset in December in Katy?
How long on average sun shines in December in Katy?
When is the lowest UV index in Katy?
What is the UV index reading in December in Katy?
Average temperature in December
Katy, WV
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in December
Katy, WV
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Katy, WV
- Average wind speed in December: 6.3mph
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 (4.2mph).
Average humidity in December
Katy, WV
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (77%).
Average rainfall in December
Katy, WV
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
Katy, WV
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is January (10.8 days).
Average snowfall in December
Katy, WV
- Average snowfall in December: 4.29"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Katy, WV
- Average snowfall days in December: 10.7 days
The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Katy, WV
- 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: 3h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Katy, WV
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is May (7.8 days).
Average UV index in December
Katy, WV
- Average UV index in December: 2
The months with the highest UV index are May and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Katy, WV
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Katy, WV
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Katy, West Virginia, USA
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