December Weather in Syracuse, United States

Last updated: June 24, 2025

In Syracuse, United States, the average temperature in December hovers around 1°C (34°F). During this time, temperatures can dip to a frigid -21°C (-6°F) or climb as high as 17°C (62°F). Expect a total precipitation of 61 mm (2.4 in) spread over 9 days. With an average humidity of 86%, prepare for a chilly and damp atmosphere!

December Temperature in Syracuse

In December in Syracuse, the average temperature is 1°C (34°F), with maximums reaching 17°C (62°F) and minimums dropping as low as -21°C (-6°F). Be prepared for a wide range of temperatures during your travels.

December Weather in Syracuse: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Syracuse, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Syracuse, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (62°F) and lows dropping to around -21°C (-6°F).

Data source: Temperature data for Syracuse generated using information from the Copernicus Climate Change Service.

December Precipitation in Syracuse

In Syracuse in December, the precipitation amount is 61 mm (2.4 in) spread over 9 days.

December Precipitation Trends in Syracuse

The chart displays monthly precipitation patterns in Syracuse, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Syracuse, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Syracuse

In Syracuse in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Syracuse

This chart illustrates the average monthly humidity levels in Syracuse, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Syracuse is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Syracuse

In Syracuse in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Syracuse, you can check the information here.

Maximum UV Index Levels in Syracuse for December

The chart shows the monthly maximum UV Index (UVI) for Syracuse in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Syracuse typically reaches 3, which falls under the moderate exposure category.

Data source: Syracuse December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Syracuse Compares to Other Months

Weather in Syracuse varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Syracuse, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Syracuse, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (28°F)	71 mm (2.8 inches)	85%	moderate
February Weather	-2°C (29°F)	75 mm (3.0 inches)	85%	moderate
March Weather	4°C (39°F)	103 mm (4.1 inches)	86%	high
April Weather	9°C (49°F)	98 mm (3.9 inches)	87%	very high
May Weather	16°C (62°F)	133 mm (5.2 inches)	81%	very high
June Weather	22°C (72°F)	121 mm (4.8 inches)	82%	very high
July Weather	24°C (75°F)	117 mm (4.6 inches)	81%	very high
August Weather	22°C (73°F)	105 mm (4.1 inches)	79%	very high
September Weather	19°C (67°F)	76 mm (3.0 inches)	78%	very high
October Weather	13°C (55°F)	121 mm (4.8 inches)	81%	high
November Weather	4°C (40°F)	80 mm (3.2 inches)	89%	moderate
December Weather	1°C (34°F)	61 mm (2.4 inches)	86%	moderate