December weather forecast
Theresa, NY

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Weather in December

The first month of the winter, December, is also a subzero cold month in Theresa, New York, with an average temperature ranging between max 31.6°F (-0.2°C) and min 22.5°F (-5.3°C).

Temperature

As November transitions into December, Theresa sees a drop in the average high-temperature, transitioning from a chilly 42.8°F (6°C) to a freezing cold 31.6°F (-0.2°C). Nighttime temperature lowers to an average of 22.5°F (-5.3°C) in December.

Humidity

The average relative humidity in December is 85%.

Rainfall

In Theresa, in December, it is raining for 11.6 days, with typically 2.87" (73mm) of accumulated precipitation. In Theresa, during the entire year, the rain falls for 166.4 days and collects up to 30.55" (776mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 17.4 days and typically aggregates up to 9.13" (232mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 54min of daylight.
On the first day of the month, sunrise is at 7:19 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:34 pm EST.

Sunshine

In Theresa, the average sunshine in December is 3.2h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, an average UV index of 1 transforms into the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Stay sun-safe with clothing that is both closely woven and worn loosely. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature during December are 31.6°F (-0.2°C) and 22.5°F (-5.3°C) respectively.

What is the average humidity in December?

The average relative humidity in December is 85%.

How much does it rain in December?

In Theresa, in December, it is raining for 11.6 days, with typically 2.87" (73mm) of accumulated precipitation.

When does it snow the most?

The month with the most snowfall is December, when snow falls for 17.4 days and typically aggregates up to 9.13" (232mm) of snow.

How many days does it snow in December?

In December, it is snowing for 17.4 days. Throughout December, 9.13" (232mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 8h and 54min of daylight, December has the shortest days of the year.

How many hours of daylight does Theresa have in December?

In Theresa, the average day length in December is 8h and 56min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:19 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:34 pm EST.

How many hours of sunshine does Theresa have in December?

The average sunshine duration in December is 3.2h.

When is the lowest UV index?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Theresa, NY

Average temperature in December - Theresa, NY
  • Average high temperature in December: 31.6°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (25°F).

  • Average low temperature in December: 22.5°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

Average pressure in December
Theresa, NY

Average pressure in December - Theresa, NY
  • Average pressure in December: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Theresa, NY

Average wind speed in December - Theresa, NY
  • Average wind speed in December: 9.2mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in December
Theresa, NY

Average humidity in December - Theresa, NY
  • Average humidity in December: 85%

The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Theresa, NY

Average rainfall in December - Theresa, NY
  • Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Theresa, NY

Average rainfall days in December - Theresa, NY
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is October (17.4 days).
The month with the least rainy days is February (8.1 days).

Average snowfall in December
Theresa, NY

Average snowfall in December - Theresa, NY
  • Average snowfall in December: 9.13"

The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Theresa, NY

Average snowfall days in December - Theresa, NY
  • Average snowfall days in December: 17.4 days

The month with the highest number of snowfall days is January (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Theresa, NY

Average daylight in December / Average sunshine in December - Theresa, NY
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 3h and 1min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 2h and 54min).

Average sunshine days in December
Theresa, NY

Average sunshine days in December - Theresa, NY
  • Average sunshine days in December: 7.6 days

The month with the most sunshine days is September (14.8 days).
The month with the least sunshine days is February (6.9 days).

Average UV index in December
Theresa, NY

Average UV index in December - Theresa, NY
  • Average UV index in December: 1

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

Average cloud cover in December
Theresa, NY

Average cloud cover in December - Theresa, NY
  • Average cloud cover in December: 68

The months with the most cloud cover are January and February (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Theresa, NY

Average visibility in December - Theresa, NY
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Theresa, New York, USA

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