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
December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 54.1°F (12.3°C) to a chilly 45.1°F (7.3°C). Nighttime temperatures consistently average a cold 32.9°F (0.5°C) during December.Humidity
The months with the highest humidity in Saint Helens are February and December, with an average relative humidity of 80%.Rainfall
In December, in Saint Helens, the rain falls for 12.2 days. Throughout December, 3.07" (78mm) of precipitation is accumulated. In Saint Helens, Kentucky, during the entire year, the rain falls for 167.6 days and collects up to 33.11" (841mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Saint Helens. In Saint Helens, Kentucky, during December, snow falls for 6.5 days and regularly aggregates up to 2.48" (63mm) of snow. Throughout the year, there are 32.6 snowfall days, and 12.17" (309mm) of snow is accumulated.Daylight
The month with the shortest days in Saint Helens is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:31 am and sunset at 5:16 pm. On the last day of December, sunrise is at 7:49 am and sunset at 5:26 pm EST.
Sunshine
In Saint Helens, the average sunshine in December is 4.4h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Helens. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
What are the temperatures in Saint Helens in December?
What are the most humid months in Saint Helens?
What is the average humidity in December in Saint Helens?
How many days does it rain in December in Saint Helens?
How much does it snow in Saint Helens in December?
What is the month with the shortest days in Saint Helens?
What is the average length of the day in December in Saint Helens?
When are sunrise and sunset in December in Saint Helens?
How many hours of sunshine does Saint Helens have in December?
What is the month with the lowest UV index in Saint Helens?
How high is the UV index in December in Saint Helens?
Average temperature in December
Saint Helens, KY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Saint Helens, KY
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Saint Helens, KY
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Saint Helens, KY
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are June, August, October and November (75%).
Average rainfall in December
Saint Helens, KY
- Average rainfall in December: 3.07"
The wettest months (with the highest rainfall) are February and May (3.46").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Saint Helens, KY
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in December
Saint Helens, KY
- Average snowfall in December: 2.48"
The month with the highest snowfall is February (2.99").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Helens, KY
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (9.6 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
Saint Helens, KY
- 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Saint Helens, KY
- Average sunshine days in December: 13.3 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Saint Helens, KY
- 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
Saint Helens, KY
- Average cloud cover in December: 55
The months with the most cloud cover are January and February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Saint Helens, KY
- Average visibility in December: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
Saint Helens, Kentucky, USA
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