December weather forecast
Winthrop, IN

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Weather in December

The first month of the winter, December, is also an icy month in Winthrop, Indiana, with an average temperature fluctuating between 27.3°F (-2.6°C) and 37.6°F (3.1°C).

Temperature

As November transitions to December, the average high-temperature falls from a frosty 48.7°F (9.3°C) to an icy 37.6°F (3.1°C). Winthrop throughout December, experiences an average nighttime temperature of 27.3°F (-2.6°C).

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Winthrop, during December, the rain falls for 10 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, there are 161.5 rainfall days, and 27.91" (709mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Winthrop are January through April, November and December. In Winthrop, in December, snow falls for 8.5 days, with typically accumulated 2.24" (57mm) of snow. In Winthrop, during the entire year, snow falls for 37.6 days and aggregates up to 10.59" (269mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:53 am and sunset at 5:23 pm. On the last day of December, sunrise is at 8:11 am and sunset at 5:32 pm EST.

Sunshine

In Winthrop, the average sunshine in December is 4.4h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

During December, Winthrop experiences an average high-temperature of 37.6°F (3.1°C) and a low-temperature of 27.3°F (-2.6°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is calculated to be 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 81%.

How many days does it rain in December?

In Winthrop, in December, it is raining for 10 days, with typically 1.65" (42mm) of accumulated precipitation.

How many days does it snow in December?

In Winthrop, during December, snow falls for 8.5 days and regularly aggregates up to 2.24" (57mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

The average day length in December is 9h and 21min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:53 am and sunset at 5:23 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 5:32 pm EST.

How many hours of sunshine does Winthrop have in December?

The average sunshine duration in December is 4.4h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
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
Winthrop, IN

Average temperature in December - Winthrop, IN
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
Winthrop, IN

Average pressure in December - Winthrop, 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
Winthrop, IN

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

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Winthrop, IN

Average humidity in December - Winthrop, IN
  • Average humidity in December: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (73%).

Average rainfall in December
Winthrop, IN

Average rainfall in December - Winthrop, IN
  • Average rainfall in December: 1.65"

The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in December
Winthrop, IN

Average rainfall days in December - Winthrop, IN
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in December
Winthrop, IN

Average snowfall in December - Winthrop, IN
  • Average snowfall in December: 2.24"

The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Winthrop, IN

Average snowfall days in December - Winthrop, IN
  • Average snowfall days in December: 8.5 days

The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Winthrop, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
Winthrop, IN

Average sunshine days in December - Winthrop, IN
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is July (9 days).

Average UV index in December
Winthrop, IN

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

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

Average cloud cover in December
Winthrop, IN

Average cloud cover in December - Winthrop, IN
  • Average cloud cover in December: 55

The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are June and August (Cloud cover 32).

Average visibility in December
Winthrop, IN

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

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

Winthrop, Indiana, USA

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