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, the first month of the winter, in Indianapolis, is also a wintry month, with average temperature ranging between max 38.3°F (3.5°C) and min 28.2°F (-2.1°C).

Temperature

In December, the average high-temperature decreases, from a frosty 49.3°F (9.6°C) in November, to a cold 38.3°F (3.5°C). In December, the average low-temperature is 28.2°F (-2.1°C).

Humidity

The most humid month is December, with an average relative humidity of 82%.

Rainfall

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

Snowfall

January through April, November and December are months with snowfall. December is the month with the most snowfall in Indianapolis. Snow falls for 6.2 days and accumulates 2.28" (58mm) of snow.

Daylight

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

Sunshine

The average sunshine in December is 4.2h.

UV index

Months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. 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 Indianapolis?

The average high-temperature, in December, in Indianapolis, Indiana, 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, Indiana, with an average relative humidity of 82%.

What is the average humidity in December in Indianapolis?

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

How many days does it rain in December in Indianapolis?

In Indianapolis, Indiana, in December, during 8.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

How many days does it snow in December in Indianapolis?

In Indianapolis, during December, snow falls for 6.2 days and regularly aggregates up to 2.28" (58mm) of snow.

What is the snowiest month in Indianapolis?

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

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 in Indianapolis, Indiana.

How many hours of daylight does Indianapolis have in December?

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

How many hours of sunshine does Indianapolis have in December?

In Indianapolis, Indiana, the average sunshine in December is 4.2h.

When is the lowest UV index in Indianapolis?

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

How high is the UV index in December in Indianapolis?

In Indianapolis, Indiana, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV rays.
Average temperature in December - Indianapolis, IN
  • Average high temperature in December: 3.5°C

The warmest month (with the highest average high temperature) is July (27.8°C).
The month with the lowest average high temperature is January (0.8°C).

  • Average low temperature in December: -2.1°C

The month with the highest average low temperature is July (19°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).

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: 40mm

The wettest month (with the highest rainfall) is May (68mm).
The driest month (with the lowest rainfall) is February (31mm).

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 lowest number of rainy days is February (6.8 days).

Average snowfall in December - Indianapolis, IN
  • Average snowfall in December: 58mm

The month with the highest snowfall is December (58mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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 lowest number of 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 shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4.2h

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

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).