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 onset of December results in a decrease in the average high-temperature, receding from a fresh 50.9°F (10.5°C) in November to an icy 40.8°F (4.9°C). During December, Cynthiana's temperature falls to a steady low-temperature average of 30°F (-1.1°C).Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 82%.Rainfall
In Cynthiana, in December, during 12.1 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. Throughout the year, there are 174 rainfall days, and 34.72" (882mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 9.3 days. Throughout December, 2.99" (76mm) of snow is accumulated. In Cynthiana, during the entire year, snow falls for 40.1 days and aggregates up to 15.04" (382mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Cynthiana.On the first day of December, sunrise is at 7:34 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:20 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Cynthiana, OH
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 30°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 (22.8°F).
Average pressure in December
Cynthiana, OH
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Cynthiana, OH
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Cynthiana, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and December (82%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Cynthiana, OH
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Cynthiana, OH
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in December
Cynthiana, OH
- Average snowfall in December: 2.99"
The month with the highest snowfall is February (4.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cynthiana, OH
- Average snowfall days in December: 9.3 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cynthiana, OH
- Average daylight in December: 9h and 3min
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 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
Cynthiana, OH
- Average sunshine days in December: 12.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in December
Cynthiana, OH
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Cynthiana, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Cynthiana, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, August, October, November and December (6mi).
The months with the lowest visibility are January, February, May, July and September (5mi).
Cynthiana, Ohio, USA
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