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 transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a frosty 48.6°F (9.2°C) in November to a cold 38.5°F (3.6°C). During December, the nighttime temperature averages to a freezing cold 28°F (-2.2°C).Humidity
The average relative humidity in December is 83%.Rainfall
In December, the rain falls for 9.8 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 149.2 rainfall days, and 18.86" (479mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 8.8 days. Throughout December, 1.38" (35mm) of snow is accumulated. Throughout the year, there are 43.5 snowfall days, and 7.4" (188mm) 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 in Saint Louisville, sunrise is at 7:33 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:14 pm EST.
Sunshine
In Saint Louisville, the average sunshine in December is 3.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Saint Louisville have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Saint Louisville have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Saint Louisville, OH
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Saint Louisville, 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
Saint Louisville, OH
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Saint Louisville, OH
- Average humidity in December: 83%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is November (77%).
Average rainfall in December
Saint Louisville, OH
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in December
Saint Louisville, OH
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is May (17.3 days).
The months with the least rainy days are January and February (8.3 days).
Average snowfall in December
Saint Louisville, OH
- Average snowfall in December: 1.38"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Louisville, OH
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Louisville, 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 months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Saint Louisville, OH
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Saint Louisville, OH
- Average UV index in December: 2
The months with the highest UV index are 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
Saint Louisville, OH
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Saint Louisville, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Saint Louisville, Ohio, USA
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