Dayton
Ohio, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Dayton, OH

The Maimi and Mad rivers converge to flow through Dayton city, Ohio, viewed from above
The Maimi and Mad rivers converge to flow through Dayton city, Ohio, viewed from above
The first month of the winter, December, is also a wintry month in Dayton, Ohio, with average temperature fluctuating between 38.1°F (3.4°C) and 24.3°F (-4.3°C).

Temperature

In Dayton, the average high-temperature drops, from a fresh 51.1°F (10.6°C) in November, to a cold 38.1°F (3.4°C). In Dayton, the average low-temperature is 24.3°F (-4.3°C).

Humidity

With an average relative humidity of 75.8%, December is the most humid month in Dayton.

Rainfall

In Dayton, Ohio, during December, the rain falls for 12.4 days and regularly aggregates up to 3.1" (79.2mm) of precipitation. In Dayton, during the entire year, the rain falls for 135.8 days and collects up to 41" (1042.5mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

With an average of 3.2h of sunshine, December has the least sunshine of the year.

UV index

Months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Dayton?

In Dayton, in December, the average high-temperature is 38.1°F (3.4°C), and the average low-temperature is 24.3°F (-4.3°C).

What is the most humid month in Dayton?

December is the most humid month in Dayton, with an average relative humidity of 75.8%.

What is the average humidity in December in Dayton?

In December, the average relative humidity in Dayton is 75.8%.

How many days does it rain in December in Dayton?

In Dayton, Ohio, during December, the rain falls for 12.4 days and regularly aggregates up to 3.1" (79.2mm) of precipitation.

How much does it snow in Dayton in December?

In Dayton, Ohio, in December, snow falls for 4.6 days, with typically accumulated 4.5" (114.3mm) of snow.

What is the month with the shortest days in Dayton?

The month with the shortest days is December, with an average of 9.4h of daylight.

What is the average length of the day in December in Dayton?

In December, the average length of the day in Dayton is 9.4h.

What is the month with the least sunshine in Dayton?

The month with the least sunshine in Dayton, Ohio, is December, with an average of 3.2h of sunshine.

How long on average sun shines in December in Dayton?

The average sunshine in December is 3.2h.

What is the month with the lowest UV index in Dayton?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December in Dayton?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.
Average temperature in December - Dayton, OH
  • Average high temperature in December: 38.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in December: 24.3°F

The month with the highest average low temperature is July (64.5°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average humidity in December - Dayton, OH
  • Average humidity in December: 75.8%

The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (64.2%).

Average rainfall in December - Dayton, OH
  • Average rainfall in December: 3.1"

The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the lowest rainfall) is February (2.2").

Average rainfall days in December - Dayton, OH
  • Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is May (13.7 days).
The month with the lowest number of rainy days is August (8.4 days).

Average snowfall in December - Dayton, OH
  • Average snowfall in December: 4.5"

The month with the highest snowfall is January (7.9").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in December - Dayton, OH
  • Average snowfall days in December: 4.6 days

The month with the highest number of snowfall days is January (6.3 days).
Months with the lowest number of 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: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 3.2h

The month with most sunshine is June (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in December - Dayton, OH
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).