December weather forecast
Syracuse, NY

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A water fountain in the Clinton Square in Syracuse, New York, with a view of towering historical buildings
A water fountain in the Clinton Square in Syracuse, New York, with a view of towering historical buildings

Weather in December

December in Syracuse marks the official start of winter, as the temperature plummets to 34.5°F (1.4°C), ushering in the chill of the season. Snowfall becomes a regular visitor, contributing to the year-end festivities. The month, with its limited daylight, hosts the shortest day of the year. Though the sun seems fickle in its appearances, the city prepares for the calm and bitter cold of its journey through winter. As the year draws to a close, snowflakes fill the air in December, setting the stage for a dreamy white holiday season.

Temperature

The transition into December indicates a reduction in the average high-temperature, down to a wintry 34.5°F (1.4°C) from November's frosty 44.8°F (7.1°C). Night temperatures during December stabilize at an average of 25.5°F (-3.6°C), closely mirroring the daytime temperatures.

Humidity

In Syracuse, the average relative humidity in December is 85%.

Rainfall

In Syracuse, in December, it is raining for 9.2 days, with typically 1.26" (32mm) of accumulated precipitation. In Syracuse, during the entire year, the rain falls for 141.4 days and collects up to 16.57" (421mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. The months with the most snowfall are February and December, with an average 3.62" (92mm) of accumulated snow.

Daylight

December has the shortest days of the year in Syracuse, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:30 pm. On the last day of December, in Syracuse, sunrise is at 7:35 am and sunset at 4:39 pm EST.

Sunshine

The average sunshine in December is 2.9h.

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 health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the maximum UV index of 1 transforms into these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

In Syracuse, in December, the average high-temperature is 34.5°F (1.4°C), and the average low-temperature is 25.5°F (-3.6°C).

What is the average humidity in December?

In Syracuse, the average relative humidity in December is 85%.

How much does it rain in December?

In Syracuse, in December, during 9.2 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

What is the snowiest month?

The months with the most snowfall are February and December, with an average 3.62" (92mm) of accumulated snow.

How many days does it snow in December?

In December, it is snowing for 14.3 days. Throughout December, 3.62" (92mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

How many hours of daylight does Syracuse have in December?

In December, the average day length is 9h and 4min.

When is the sunrise / sunset in December?

On the first day of December in Syracuse, sunrise is at 7:16 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:39 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 2.9h.

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

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

What is the UV index intensity 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
Syracuse, NY

Average temperature in December - Syracuse, NY
  • Average high temperature in December: 34.5°F

The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

Average pressure in December
Syracuse, NY

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

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Syracuse, NY

Average wind speed in December - Syracuse, NY
  • Average wind speed in December: 9.9mph

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 (6.2mph).

Average humidity in December
Syracuse, NY

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

The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is April (78%).

Average rainfall in December
Syracuse, NY

Average rainfall in December - Syracuse, NY
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is September (1.02").

Average rainfall days in December
Syracuse, NY

Average rainfall days in December - Syracuse, NY
  • Average rainfall days in December: 9.2 days

The months with the highest number of rainy days are May and July (15 days).
The month with the least rainy days is January (6.7 days).

Average snowfall in December
Syracuse, NY

Average snowfall in December - Syracuse, NY
  • Average snowfall in December: 3.62"

The months with the highest snowfall are February and December (3.62").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Syracuse, NY

Average snowfall days in December - Syracuse, NY
  • Average snowfall days in December: 14.3 days

The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Syracuse, NY
  • Average daylight in December: 9h and 1min

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 6min).

  • Average sunshine in December: 2h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).

Average sunshine days in December
Syracuse, NY

Average sunshine days in December - Syracuse, NY
  • Average sunshine days in December: 10.3 days

The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (7.2 days).

Average UV index in December
Syracuse, NY

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Syracuse, NY

Average cloud cover in December - Syracuse, NY
  • Average cloud cover in December: 71

The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 32).

Average visibility in December
Syracuse, NY

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

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

Syracuse, New York, USA

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