December weather forecast
Ontario Center, NY

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Weather in December

December, the first month of the winter in Ontario Center, is still a cold month, with an average temperature ranging between max 36.3°F (2.4°C) and min 28.6°F (-1.9°C).

Temperature

The decrease of average high-temperatures is mild in December, with a decline from a frosty 45.9°F (7.7°C) in November to an icy 36.3°F (2.4°C). Ontario Center encounters a small divergence from daytime high temperatures, averaging a low-temperature of 28.6°F (-1.9°C) during December nights.

Humidity

The average relative humidity in December is 81%.

Rainfall

In Ontario Center, during December, the rain falls for 10.7 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Ontario Center, during the entire year, the rain falls for 167.9 days and collects up to 31.18" (792mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Ontario Center, in December, during 12.8 snowfall days, 4.37" (111mm) of snow is typically accumulated. Throughout the year, there are 62.3 snowfall days, and 20.63" (524mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year in Ontario Center.
On the first day of December, sunrise is at 7:22 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:43 pm EST.

Sunshine

In December, the average sunshine is 3h.

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 low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

During December, Ontario Center experiences an average high-temperature of 36.3°F (2.4°C) and a low-temperature of 28.6°F (-1.9°C).

What is the average humidity in December?

In Ontario Center, the average relative humidity in December is 81%.

How many days does it rain in December in Ontario Center?

In December, the rain falls for 10.7 days. Throughout December, 2.68" (68mm) of precipitation is accumulated.

How much does it snow in December?

In Ontario Center, in December, snow falls for 12.8 days, with typically accumulated 4.37" (111mm) of snow.

What is the month with the shortest days?

The month with the shortest days in Ontario Center is December, with an average of 9h and 0min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 3min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:22 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:43 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 3h.

What are the months with 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?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Ontario Center, NY

Average temperature in December - Ontario Center, NY
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

Average pressure in December
Ontario Center, NY

Average pressure in December - Ontario Center, NY
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Ontario Center, NY

Average wind speed in December - Ontario Center, NY
  • Average wind speed in December: 12.4mph

The windiest month (with the highest average wind speed) is January (13.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

Average humidity in December
Ontario Center, NY

Average humidity in December - Ontario Center, NY
  • Average humidity in December: 81%

The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are August and September (75%).

Average rainfall in December
Ontario Center, NY

Average rainfall in December - Ontario Center, NY
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is October (3.23").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days in December
Ontario Center, NY

Average rainfall days in December - Ontario Center, NY
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (7.8 days).

Average snowfall in December
Ontario Center, NY

Average snowfall in December - Ontario Center, NY
  • Average snowfall in December: 4.37"

The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Ontario Center, NY

Average snowfall days in December - Ontario Center, NY
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Ontario Center, NY

Average daylight in December / Average sunshine in December - Ontario Center, NY
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 3h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).

Average sunshine days in December
Ontario Center, NY

Average sunshine days in December - Ontario Center, NY
  • Average sunshine days in December: 8.1 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.3 days).

Average UV index in December
Ontario Center, NY

Average UV index in December - Ontario Center, NY
  • Average UV index in December: 1

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

Average cloud cover in December
Ontario Center, NY

Average cloud cover in December - Ontario Center, NY
  • Average cloud cover in December: 70

The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 27).

Average visibility in December
Ontario Center, NY

Average visibility in December - Ontario Center, NY
  • Average visibility in December: 6mi

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

Ontario Center, New York, USA

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