Indianapolis
Indiana, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Indianapolis, IN

The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
December begins the cold winter season in Indianapolis with the average temperatures plummeting to the 24.1°F (-4.4°C) to 39°F (3.9°C) range. Almost 14 days during the month, see low temperatures below 19.9°F (-6.7°C).
The first significant snowfall of the season occurs in December as the month registers a moderate 7" (177.8mm). The precipitation of 3.1" (78.7mm) and daily sunshine for hardly 3.5 hours make the days wet, dark, and chilly. Christmas period may see a blanket of snow in Indianapolis, but the city is never short of celebrations.
There are better times to visit Indianapolis than December.

What is the temperature in December in Indianapolis?

The average high-temperature, in December, is 38.8°F (3.8°C), while the average low-temperature is 24.4°F (-4.2°C).

What is the most humid month in Indianapolis?

With an average relative humidity of 78%, December is the most humid month in Indianapolis.

What is the average humidity in December in Indianapolis?

In Indianapolis, Indiana, the average relative humidity in December is 78%.

How much does it rain in Indianapolis in December?

In Indianapolis, Indiana, in December, it is raining for 12.5 days, with typically 3.2" (80.5mm) of accumulated precipitation.

How much does it snow in Indianapolis in December?

In December, in Indianapolis, Indiana, it is snowing for 6.3 days. Throughout December, 6.9" (175.3mm) of snow is accumulated.

What is the month with the shortest days in Indianapolis?

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

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

The average length of the day in December is 9.4h.

What is the month with the least sunshine in Indianapolis?

December has the least sunshine of the year, with an average of 3.3h of sunshine.

How many hours of sunshine does Indianapolis have in December?

In December, the average sunshine in Indianapolis is 3.3h.

When is the lowest UV index in Indianapolis?

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

What is the UV index reading in December in Indianapolis?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Indianapolis, IN
  • Average high temperature in December: 38.9°F

The warmest month (with the highest average high temperature) is July (85°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in December: 24.4°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average humidity in December - Indianapolis, IN
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is April (65.6%).

Average rainfall in December - Indianapolis, IN
  • Average rainfall in December: 3.2"

The wettest month (with the highest rainfall) is May (5.1").
The driest month (with the lowest rainfall) is February (2.3").

Average rainfall days in December - Indianapolis, IN
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is May (13.1 days).
The month with the lowest number of rainy days is September (8.1 days).

Average snowfall in December - Indianapolis, IN
  • Average snowfall in December: 6.9"

The month with the highest snowfall is January (8.6").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in December - Indianapolis, IN
  • Average snowfall days in December: 6.3 days

The month with the highest number of snowfall days is January (7.5 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 - Indianapolis, IN
  • 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: 3.3h

The month with most sunshine is June (Average sunshine: 9.6h).
The month with least sunshine is December (Average sunshine: 3.3h).

Average UV index in December - Indianapolis, IN
  • 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).