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 sea temperature 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 implies a soft temperature shift, with average high-temperatures reducing from November's chilly 46.8°F (8.2°C) to a wintry 37.9°F (3.3°C). Willoughby welcomes an average low temperature of 30.2°F (-1°C) in December, a gentle shift from the day's high.Humidity
The average relative humidity in December in Willoughby is 82%.Rainfall
In Willoughby, during December, the rain falls for 11.4 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Willoughby, during the entire year, the rain falls for 178.9 days and collects up to 32.2" (818mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Willoughby. In December, it is snowing for 13.5 days. Throughout December, 3.98" (101mm) of snow is accumulated. Throughout the year, in Willoughby, there are 64.4 snowfall days, and 19.92" (506mm) of snow is accumulated.Ocean temperature
In Willoughby, Ohio, in December, the average water temperature is 40.5°F (4.7°C).Note: In relation to swimming, this scenario is excessively cold, perilous, and a direct threat to life. Hypothermia strikes rapidly in the absence of insulated waterproof gear.
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, in Willoughby, sunrise is at 7:52 am and sunset at 5:05 pm EST.
Sunshine
The average sunshine in December is 3.1h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 1 in December translates into this advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Willoughby in December?
What is the average humidity in December in Willoughby?
How many days does it rain in December in Willoughby?
How many days does it snow in December in Willoughby?
How cold is the water in December in Willoughby?
What is the month with the shortest days in Willoughby?
How many hours of daylight does Willoughby have in December?
What time are sunrise and sunset in December in Willoughby?
How long on average sun shines in December in Willoughby?
When is the lowest UV index in Willoughby?
What is the UV index intensity in December in Willoughby?
Average temperature in December
Willoughby, OH
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Willoughby, 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, OH
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Willoughby, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in December
Willoughby, OH
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Willoughby, OH
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is October (18 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Willoughby, OH
- Average snowfall in December: 3.98"
The month with the highest snowfall is February (5.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Willoughby, OH
- Average snowfall days in December: 13.5 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Willoughby, OH
- Average sea temperature in December: 40.4°F
The best month for swimming (with the highest average sea temperature) is August (75.7°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).
Average daylight in December /
Average sunshine in December
Willoughby, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Willoughby, OH
- Average sunshine days in December: 7.7 days
The month with the most sunshine days is May (11.4 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in December
Willoughby, OH
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Willoughby, OH
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
Willoughby, OH
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Willoughby, Ohio, USA
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