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
Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a chilly 47.7°F (8.7°C) to an icy 37.4°F (3°C). Throughout the nights in December, an average low-temperature of 26.8°F (-2.9°C) is noted in Sullivan, Ohio.Humidity
In December, the average relative humidity is 85%.Rainfall
In December, the rain falls for 7 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 128.1 rainfall days, and 13.31" (338mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Sullivan, Ohio. In Sullivan, Ohio, in December, snow falls for 6.9 days, with typically accumulated 0.91" (23mm) of snow. In Sullivan, during the entire year, snow falls for 38.5 days and aggregates up to 5.55" (141mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Sullivan.On the first day of the month, sunrise is at 7:35 am and sunset at 5:01 pm. On the last day of December, in Sullivan, Ohio, sunrise is at 7:53 am and sunset at 5:10 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 1 in December translates into these instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Sullivan?
What is the average humidity in December in Sullivan?
How much does it rain in Sullivan in December?
How much does it snow in Sullivan in December?
What is the month with the shortest days in Sullivan?
What is the average length of the day in December in Sullivan?
What time are sunrise and sunset in December in Sullivan?
How many hours of sunshine does Sullivan have in December?
When is the lowest UV index in Sullivan?
What is the UV index intensity in December in Sullivan?
Average temperature in December
Sullivan, OH
- Average high temperature in December: 37.4°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Sullivan, OH
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Sullivan, OH
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in December
Sullivan, OH
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and November (78%).
Average rainfall in December
Sullivan, OH
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in December
Sullivan, OH
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in December
Sullivan, OH
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sullivan, OH
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is February (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sullivan, OH
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Sullivan, OH
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Sullivan, 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
Sullivan, OH
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Sullivan, 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).
Sullivan, Ohio, USA
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