December weather forecastDayton, IN
December
Weather in December
December, the first month of the winter in Dayton, is still a cold month, with temperature in the range of an average low of 27.3°F (-2.6°C) and an average high of 37.6°F (3.1°C).Temperature
December involves a decrease in temperature, down from a chilly 48.2°F (9°C) in November to a cold 37.6°F (3.1°C). Nighttime temperature dips to a mean of 27.3°F (-2.6°C) during December.Humidity
In December, the average relative humidity is 82%.Rainfall
In Dayton, in December, during 9.5 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Dayton, during the entire year, the rain falls for 161.4 days and collects up to 26.89" (683mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 8.8 days. Throughout December, 2.44" (62mm) of snow is accumulated. In Dayton, during the entire year, snow falls for 41.6 days and aggregates up to 11.57" (294mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:51 am and sunset at 5:21 pm. On the last day of December, sunrise is at 8:09 am and sunset at 5:30 pm EST.
Sunshine
The average sunshine in December is 4.3h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. 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
Average temperature in December
Dayton, IN
- Average high temperature in December: 37.6°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 (31.8°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Dayton, IN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Dayton, IN
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Dayton, IN
- Average humidity in December: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Dayton, IN
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is April (3.43").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in December
Dayton, IN
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Dayton, IN
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Dayton, IN
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dayton, IN
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Dayton, IN
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is November (17.5 days).
The months with the least sunshine days are May and July (9.3 days).
Average UV index in December
Dayton, IN
- 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, October, November and December (UV index 2).
Average cloud cover in December
Dayton, IN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are June, July, August and September (Cloud cover 33).
Average visibility in December
Dayton, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
