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
Onset of December comes with a temperature decline, the average high falling from a frosty 48.6°F (9.2°C) in November to an icy 38.1°F (3.4°C). Throughout December, the temperature tends to fall to a consistent average low of 27.5°F (-2.5°C).Humidity
January and December, with an average relative humidity of 83%, are the most humid months.Rainfall
In Extension Heights, in December, it is raining for 8.9 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in Extension Heights, there are 146.5 rainfall days, and 22.32" (567mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Extension Heights, Indiana, in December, during 7.5 snowfall days, 2.17" (55mm) of snow is typically accumulated. In Extension Heights, during the entire year, snow falls for 34.2 days and aggregates up to 9.17" (233mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December in Extension Heights, sunrise is at 7:46 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 5:27 pm EST.
Sunshine
In December, the average sunshine is 4h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December in Extension Heights?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Extension Heights have in December?
When is the lowest UV index in Extension Heights?
What is the UV index reading in December in Extension Heights?
Average temperature in December
Extension Heights, IN
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Extension Heights, IN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Extension Heights, IN
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Extension Heights, IN
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Extension Heights, IN
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in December
Extension Heights, IN
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in December
Extension Heights, IN
- Average snowfall in December: 2.17"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Extension Heights, IN
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Extension Heights, IN
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Extension Heights, IN
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Extension Heights, IN
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Extension Heights, IN
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Extension Heights, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Extension Heights, Indiana, USA
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