December weather forecastDayton, OH
December
Weather in December
December in Dayton, Ohio, is characterized by wintry conditions. The city feels the chill of winter, with short days and long nights in store. Apart from the cold, the city also experiences increased snowfall and brisk winds, adding to the overall winter charm. The holiday season further elevates the festive spirit, despite the cold weather. A dip in temperature to 28.9°F (-1.7°C) typically marks the height of winter.Temperature
December's onset in Dayton brings a reduction in the average high-temperature, from a chilly 49.1°F (9.5°C) in November to a wintry 39.2°F (4°C). In December, the average low-temperature is a freezing cold 28.9°F (-1.7°C).Humidity
January, February and December, with an average relative humidity of 82%, are the most humid months.Rainfall
In Dayton, in December, it is raining for 9.4 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 149.5 rainfall days, and 23.9" (607mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Dayton, in December, during 5.9 snowfall days, 1.38" (35mm) of snow is typically accumulated. In Dayton, during the entire year, snow falls for 26.5 days and aggregates up to 7.68" (195mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:39 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:22 pm EST.
Sunshine
In Dayton, 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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. When the Sun is at its strongest around midday, find shade and limit exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dayton, OH
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.9°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 (21.7°F).
Average pressure in December
Dayton, 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 (29.93"Hg).
Average wind speed in December
Dayton, OH
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Dayton, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Dayton, OH
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are September and November (1.5").
Average rainfall days in December
Dayton, OH
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in December
Dayton, OH
- Average snowfall in December: 1.38"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Dayton, OH
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dayton, OH
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 6min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Dayton, OH
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Dayton, 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
Dayton, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Dayton, OH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
