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 suggests a modest reduction in the average high-temperature, shifting from a fresh 50.9°F (10.5°C) in November to a wintry 41°F (5°C). In the month of December, the temperature generally rests at an average low of 30.2°F (-1°C).Humidity
The most humid month is December, with an average relative humidity of 81%.Rainfall
In Greenhills, in December, during 8.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 121.7 rainfall days, and 12.4" (315mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Greenhills, during December, snow falls for 5.5 days and regularly aggregates up to 0.67" (17mm) of snow. Throughout the year, in Greenhills, there are 23.7 snowfall days, and 3.98" (101mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December in Greenhills, Ohio, sunrise is at 7:39 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:25 pm EST.
Sunshine
In December, the average sunshine is 4.2h.UV index
December is the month with the lowest UV index in Greenhills, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. 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
Is it cold during December?
What is the most humid month?
What is the average humidity in December in Greenhills?
How many days does it rain in December?
How much does it snow in Greenhills in December?
What is the month with the shortest days?
How many hours of daylight does Greenhills have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Greenhills have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December in Greenhills?
Average temperature in December
Greenhills, OH
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Greenhills, 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 (29.94"Hg).
Average wind speed in December
Greenhills, OH
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Greenhills, OH
- Average humidity in December: 81%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are August, September and October (74%).
Average rainfall in December
Greenhills, OH
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is September (0.63").
Average rainfall days in December
Greenhills, OH
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in December
Greenhills, OH
- Average snowfall in December: 0.67"
The month with the highest snowfall is January (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Greenhills, OH
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (6.1 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
Greenhills, 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 July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Greenhills, OH
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (14 days).
Average UV index in December
Greenhills, OH
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Greenhills, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Greenhills, OH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Greenhills, Ohio, USA
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