December weather forecast
Treaty, IN

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Weather in December

The first month of the winter, December, is also a wintry month in Treaty, Indiana, with an average temperature varying between 26.6°F (-3°C) and 36.5°F (2.5°C).

Temperature

A moderate decline in the average high-temperature is seen during December, decreasing from a frosty 47.5°F (8.6°C) in November to an icy 36.5°F (2.5°C). The mean low-temperature during December nights is a subzero cold 26.6°F (-3°C).

Humidity

January, February, July, August and December, with an average relative humidity of 83%, are the most humid months.

Rainfall

In Treaty, in December, during 9.3 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 157.1 rainfall days, and 23.27" (591mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Treaty. In December, it is snowing for 10.1 days. Throughout December, 1.77" (45mm) of snow is accumulated. In Treaty, during the entire year, snow falls for 47.4 days and aggregates up to 10.39" (264mm) of snow.

Daylight

The month with the shortest days in Treaty is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:48 am and sunset at 5:16 pm. On the last day of December, sunrise is at 8:07 am and sunset at 5:25 pm EST.

Sunshine

In December, the average sunshine in Treaty is 4.1h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 1 during December morphs into the following directions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Treaty?

An average high-temperature, in December, in Treaty, is 36.5°F (2.5°C) and the average low-temperature is 26.6°F (-3°C).

What is the most humid month in Treaty?

The months with the highest humidity in Treaty, Indiana, are January, February, July, August and December, with an average relative humidity of 83%.

What is the average humidity in December in Treaty?

In December, the average relative humidity in Treaty, Indiana, is 83%.

How much does it rain in Treaty in December?

In Treaty, Indiana, in December, it is raining for 9.3 days, with typically 1.38" (35mm) of accumulated precipitation.

How many days does it snow in December in Treaty?

In December, in Treaty, it is snowing for 10.1 days. Throughout December, 1.77" (45mm) of snow is accumulated.

What is the month with the shortest days in Treaty?

The month with the shortest days in Treaty, Indiana, is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Treaty have in December?

In December, the average day length in Treaty is 9h and 19min.

When is the sunrise / sunset in December in Treaty?

In December, on the first day of the month, sunrise is at 7:48 am and sunset at 5:16 pm. On the last day of the month, in Treaty, Indiana, sunrise is at 8:07 am and sunset at 5:25 pm EST.

How long on average sun shines in December in Treaty?

The average sunshine duration in December is 4.1h.

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

With an average maximum UV index of 1, December is the month with the lowest UV index.

What is the UV index reading in December in Treaty?

The average daily maximum UV index in December in Treaty is 1. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Treaty, IN

Average temperature in December - Treaty, IN
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 26.6°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average pressure in December
Treaty, IN

Average pressure in December - Treaty, IN
  • Average pressure in December: 30.1"Hg

The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Treaty, IN

Average wind speed in December - Treaty, IN
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

Average humidity in December
Treaty, IN

Average humidity in December - Treaty, IN
  • Average humidity in December: 83%

The months with the highest relative humidity are January, February, July, August and December (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in December
Treaty, IN

Average rainfall in December - Treaty, IN
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.22").

Average rainfall days in December
Treaty, IN

Average rainfall days in December - Treaty, IN
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (7 days).

Average snowfall in December
Treaty, IN

Average snowfall in December - Treaty, IN
  • Average snowfall in December: 1.77"

The month with the highest snowfall is February (2.83").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Treaty, IN

Average snowfall days in December - Treaty, IN
  • Average snowfall days in December: 10.1 days

The month with the highest number of snowfall days is January (13.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Treaty, IN

Average daylight in December / Average sunshine in December - Treaty, 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 18min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in December
Treaty, IN

Average sunshine days in December - Treaty, IN
  • Average sunshine days in December: 13.7 days

The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is May (9.6 days).

Average UV index in December
Treaty, IN

Average UV index in December - Treaty, IN
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Treaty, IN

Average cloud cover in December - Treaty, IN
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Treaty, IN

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

The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).

Treaty, Indiana, USA

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