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 shift from November to December corresponds with a decrease in the average high-temperature, down to a wintry 38.3°F (3.5°C) from a chilly 48.6°F (9.2°C). In December, the average low-temperature in Casstown, Ohio, records at a subzero cold 28.2°F (-2.1°C) during the nights.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
In December, the rain falls for 9.2 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. In Casstown, during the entire year, the rain falls for 149.8 days and collects up to 22.95" (583mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Casstown, in December, during 7.5 snowfall days, 1.81" (46mm) of snow is typically accumulated. Throughout the year, there are 34.4 snowfall days, and 8.74" (222mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:39 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 5:21 pm EST.
Sunshine
In December, the average sunshine is 3.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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 much does it snow in December?
What is the month with the shortest days in Casstown?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Casstown have in December?
When is the lowest UV index in Casstown?
How high is the UV index in December?
Average temperature in December
Casstown, OH
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Casstown, OH
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Casstown, OH
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Casstown, OH
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Casstown, OH
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.26").
Average rainfall days in December
Casstown, OH
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (7 days).
Average snowfall in December
Casstown, OH
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Casstown, OH
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Casstown, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Casstown, OH
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Casstown, 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
Casstown, OH
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Casstown, OH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (6mi).
The month with the lowest visibility is September (5mi).
Casstown, Ohio, USA
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