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
Welcoming December, Westerville observes a shift in the average high-temperature, falling from November's frosty 49.1°F (9.5°C) to a wintry 38.8°F (3.8°C). Westerville, in December, experiences an average temperature of 28.9°F (-1.7°C) at night.Humidity
In Westerville, the average relative humidity in December is 81%.Rainfall
In Westerville, Ohio, in December, it is raining for 9.1 days, with typically 1.14" (29mm) of accumulated precipitation. In Westerville, during the entire year, the rain falls for 149 days and collects up to 18.5" (470mm) of precipitation.Snowfall
Months with snowfall in Westerville are January through April, October through December. In Westerville, during December, snow falls for 8.2 days and regularly aggregates up to 1.34" (34mm) of snow. In Westerville, during the entire year, snow falls for 39.6 days and aggregates up to 6.22" (158mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December in Westerville, sunrise is at 7:35 am and sunset at 5:06 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 5:16 pm EST.
Sunshine
In Westerville, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Westerville?
What is the average humidity in December in Westerville?
How much does it rain in Westerville in December?
How much does it snow in Westerville in December?
What is the month with the shortest days in Westerville?
How many hours of daylight does Westerville have in December?
When is the sunrise / sunset in December in Westerville?
How long on average sun shines in December in Westerville?
When is the lowest UV index in Westerville?
What is the UV index reading in December in Westerville?
Average temperature in December
Westerville, OH
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Westerville, OH
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Westerville, OH
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Westerville, OH
- Average humidity in December: 81%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Westerville, OH
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in December
Westerville, OH
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in December
Westerville, OH
- Average snowfall in December: 1.34"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Westerville, OH
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Westerville, 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: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Westerville, OH
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in December
Westerville, OH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Westerville, OH
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Westerville, OH
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Westerville, Ohio, USA
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