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
Willoughby Hills's weather changes with the onset of December, slightly falling from a frosty 46.8°F (8.2°C) in November to an icy 37.6°F (3.1°C). December's average low-temperature is a subzero cold 29.3°F (-1.5°C), reflecting a minor difference from the day's peak temperatures.Humidity
In December, the average relative humidity in Willoughby Hills, Ohio, is 82%.Rainfall
In Willoughby Hills, Ohio, during December, the rain falls for 9.8 days and regularly aggregates up to 2.09" (53mm) of precipitation. In Willoughby Hills, during the entire year, the rain falls for 162.9 days and collects up to 28.58" (726mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Willoughby Hills. In Willoughby Hills, during December, snow falls for 13.5 days and regularly aggregates up to 4.25" (108mm) of snow. In Willoughby Hills, during the entire year, snow falls for 62.5 days and aggregates up to 19.96" (507mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:33 am and sunset at 4:56 pm. On the last day of December, sunrise is at 7:52 am and sunset at 5:05 pm EST.
Sunshine
In Willoughby Hills, the average sunshine in December is 3h.UV index
December is the month with the lowest UV index in Willoughby Hills, Ohio, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold in Willoughby Hills?
What is the average humidity in December in Willoughby Hills?
How many days does it rain in December in Willoughby Hills?
How many days does it snow in December in Willoughby Hills?
What is the month with the shortest days in Willoughby Hills?
What is the average length of the day in December in Willoughby Hills?
When is the sunrise / sunset in December in Willoughby Hills?
How many hours of sunshine does Willoughby Hills have in December?
When is the lowest UV index in Willoughby Hills?
How high is the UV index in December in Willoughby Hills?
Average temperature in December
Willoughby Hills, OH
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Willoughby Hills, OH
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Willoughby Hills, OH
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in December
Willoughby Hills, OH
- Average humidity in December: 82%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in December
Willoughby Hills, OH
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in December
Willoughby Hills, OH
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Willoughby Hills, OH
- Average snowfall in December: 4.25"
The month with the highest snowfall is January (5.59").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Willoughby Hills, OH
- Average snowfall days in December: 13.5 days
The month with the highest number of snowfall days is January (17.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Willoughby Hills, OH
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Willoughby Hills, OH
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is July (13.4 days).
The month with the least sunshine days is January (7.6 days).
Average UV index in December
Willoughby Hills, 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
Willoughby Hills, OH
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Willoughby Hills, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Willoughby Hills, Ohio, USA
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