Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The average high-temperature decreases in December, shifting from a chilly 49.3°F (9.6°C) in November to an icy 38.3°F (3.5°C). During December, Indianapolis experiences an average low-temperature of 28.2°F (-2.1°C) at night.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, 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 is December, when snow falls for 6.2 days and typically aggregates up to 2.28" (58mm) of snow.Daylight
The month with the shortest days in Indianapolis is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:47 am and sunset at 5:20 pm. On the last day of December, sunrise is at 8:05 am and sunset at 5:30 pm EST.
Sunshine
In Indianapolis, the average sunshine in December is 4.2h.UV index
The 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 low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
When does it snow the most?
How much does it snow in Indianapolis in December?
What is the month with the shortest days?
How many hours of daylight does Indianapolis have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Indianapolis have in December?
When is the lowest UV index?
What is the UV index intensity in December?
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"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
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").
The 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).
The 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: 9h and 2min
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 24min).
- 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: 4h and 6min).
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
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, 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
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).
Indianapolis, Indiana, USA
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