December weather forecast
Cincinnati, OH

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A beautiful park in spring next to the John A Roebling suspension bridge in Cincinnati, Ohio
A beautiful park in spring next to the John A Roebling suspension bridge in Cincinnati, Ohio

Weather in December

The final act in Cincinnati's weather theatre, December ushers in the full thrust of winter. As the last page on the calendar turns, the city's weather finalizes its cycle, characterized by the crisp cold, shorter days, and the grandeur of snow. The plunge in temperature is unmistakable, with ranges fluctuating between 30.6°F (-0.8°C) and 41.9°F (5.5°C), the cold intensifying by the day. While the year's closing month brings the cycle full circle, it aptly prepares the city for the snow-dusted spectacle that is a Cincinnati winter.

Temperature

Cincinnati experiences a temperature shift at the start of December, with average high-temperatures adjusting from a fresh 51.3°F (10.7°C) in November to an icy 41.9°F (5.5°C). The nighttime temperature, during December, averages of 30.6°F (-0.8°C).

Humidity

February and December, with an average relative humidity of 81%, are the most humid months in Cincinnati, Ohio.

Rainfall

In Cincinnati, in December, it is raining for 10.4 days, with typically 2.2" (56mm) of accumulated precipitation. In Cincinnati, during the entire year, the rain falls for 150.9 days and collects up to 27.64" (702mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Cincinnati, during December, snow falls for 4.5 days and regularly aggregates up to 1.3" (33mm) of snow. In Cincinnati, during the entire year, snow falls for 20.7 days and aggregates up to 6.85" (174mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:38 am and sunset at 5:15 pm. On the last day of December, sunrise is at 7:57 am and sunset at 5:25 pm EST.

Sunshine

In Cincinnati, the average sunshine in December is 4.1h.

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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 2 translates into these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. When the Sun is at its strongest around midday, find shade and limit exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In December, in Cincinnati, the average high-temperature is 41.9°F (5.5°C), and the average low-temperature is 30.6°F (-0.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is calculated to be 91.4°F (33°C).

What are the most humid months?

February and December, with an average relative humidity of 81%, are most humid months.

What is the average humidity in December?

In Cincinnati, the average relative humidity in December is 81%.

How much does it rain in December?

In December, the rain falls for 10.4 days. Throughout December, 2.2" (56mm) of precipitation is accumulated.

How much does it snow in Cincinnati in December?

In Cincinnati, in December, during 4.5 snowfall days, 1.3" (33mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

How many hours of daylight does Cincinnati have in December?

In December, the average day length is 9h and 29min.

When are sunrise and sunset in December?

On the first day of December in Cincinnati, sunrise is at 7:38 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:25 pm EST.

How many hours of sunshine does Cincinnati have in December?

In Cincinnati, the average sunshine duration in December is 4.1h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Cincinnati, OH

Average temperature in December - Cincinnati, OH
  • Average high temperature in December: 41.9°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in December: 30.6°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average pressure in December
Cincinnati, OH

Average pressure in December - Cincinnati, OH
  • Average pressure in December: 30.13"Hg

The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Cincinnati, OH

Average wind speed in December - Cincinnati, OH
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
Cincinnati, OH

Average humidity in December - Cincinnati, OH
  • Average humidity in December: 81%

The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September and October (74%).

Average rainfall in December
Cincinnati, OH

Average rainfall in December - Cincinnati, OH
  • Average rainfall in December: 2.2"

The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in December
Cincinnati, OH

Average rainfall days in December - Cincinnati, OH
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (8.2 days).

Average snowfall in December
Cincinnati, OH

Average snowfall in December - Cincinnati, OH
  • Average snowfall in December: 1.3"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Cincinnati, OH

Average snowfall days in December - Cincinnati, OH
  • Average snowfall days in December: 4.5 days

The months with the highest number of snowfall days are January and February (5.5 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
Cincinnati, OH

Average daylight in December / Average sunshine in December - Cincinnati, OH
  • Average daylight in December: 9h and 3min

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 30min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in December
Cincinnati, OH

Average sunshine days in December - Cincinnati, OH
  • Average sunshine days in December: 16.1 days

The months with the most sunshine days are October and November (19.2 days).
The month with the least sunshine days is May (10.9 days).

Average UV index in December
Cincinnati, OH

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

The months with the highest UV index are May, 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
Cincinnati, OH

Average cloud cover in December - Cincinnati, OH
  • Average cloud cover in December: 57

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Cincinnati, OH

Average visibility in December - Cincinnati, 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).

Cincinnati, Ohio, USA

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