December weather forecast and climate
Indianapolis, IN

The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape
The first month of the winter, December, is also a wintry month in Indianapolis, Indiana, with average temperature ranging between min 28.2°F (-2.1°C) and max 38.3°F (3.5°C).

Temperature

In December, the average high-temperature drops, from a chilly 49.3°F (9.6°C) in November, to a wintry 38.3°F (3.5°C). In Indianapolis, in December, the average low-temperature is 28.2°F (-2.1°C).

Humidity

With an average relative humidity of 82%, December is the most humid month.

Rainfall

In December, the rain falls for 8.9 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. Throughout the year, in Indianapolis, there are 146.4 rainfall days, and 21.14" (537mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. The month with the most snowfall in Indianapolis is December when snow falls for 6.2 days and typically aggregates up to 2.28" (58mm) of snow.

Daylight

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

Sunshine

The average sunshine in Indianapolis is 4.2h.

UV index

Months with the lowest UV index in Indianapolis are January, February, October through 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 radiation for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Indianapolis?

The average high-temperature, in December, in Indianapolis, is 38.3°F (3.5°C), while the average low-temperature is 28.2°F (-2.1°C).

What is the most humid month in Indianapolis?

December is the most humid month in Indianapolis, with an average relative humidity of 82%.

What is the average humidity in December in Indianapolis?

In December, the average relative humidity in Indianapolis is 82%.

How much does it rain in Indianapolis in December?

In Indianapolis, during December, the rain falls for 8.9 days and regularly aggregates up to 1.57" (40mm) of precipitation.

How much does it snow in Indianapolis in December?

In Indianapolis, in December, during 6.2 snowfall days, 2.28" (58mm) of snow is typically accumulated.

What is the snowiest month in Indianapolis?

December is the month with the most snowfall. Snow falls for 6.2 days and accumulates 2.28" (58mm) of snow.

What is the month with the shortest days in Indianapolis?

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

How many hours of daylight does Indianapolis have in December?

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

How many hours of sunshine does Indianapolis have in December?

The average sunshine in December in Indianapolis is 4.2h.

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

Months with the lowest UV index in Indianapolis, Indiana, are January, February, October through December, with an average maximum UV index of 2.

What is the UV index intensity in December in Indianapolis?

In Indianapolis, Indiana, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Indianapolis, IN
  • Average high temperature in December: 38.3°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.2°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in December - Indianapolis, IN
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed in December - Indianapolis, IN
  • Average wind speed in December: 9mph

The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

Average humidity in December - Indianapolis, IN
  • Average humidity in December: 82%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).

Average rainfall in December - Indianapolis, IN
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").

Average rainfall days in December - Indianapolis, IN
  • Average rainfall days in December: 8.9 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).

Average snowfall in December - Indianapolis, IN
  • Average snowfall in December: 2.28"

The month with the highest snowfall is December (2.28").
Months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December - Indianapolis, IN
  • Average snowfall days in December: 6.2 days

The month with the highest number of snowfall days is January (7.9 days).
Months with the least snowfall days are 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 the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4.2h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4.1h).

Average sunshine days in December - Indianapolis, IN
  • Average sunshine days in December: 17 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in December - Indianapolis, IN
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in December - Indianapolis, IN
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December - Indianapolis, IN
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).