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December Weather in Syracuse, United States

Last updated: June 24, 2025

In December, the average temperature in Syracuse, United States hovers around 3°C (37°F), with a range that can dip as low as -17°C (2°F) and spike up to a warm 24°C (75°F). Expect about 16 mm (0.6 in) of precipitation spread over 2 days, accompanied by a high average humidity of 83%.

December Temperature in Syracuse

In December in Syracuse, the average temperature is 3°C (37°F). Maximum temperatures can reach 24°C (75°F), while the minimum can drop as low as -17°C (2°F). It's advisable to pack layers to accommodate the significant temperature range 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 3°C (37°F), with highs reaching up to 24°C (75°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec343446546376797771554537
Data source: Temperature data for Syracuse generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Syracuse

In Syracuse in December, the precipitation amount is 16 mm (0.6 in) over a period of 2 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 16 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec161738389148455937281016
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Syracuse

In Syracuse in December, humidity is 83%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and encouraging travelers to seek indoor attractions or cozy cafes.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%77%65%67%81%82%82%84%79%75%79%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec457101112121110753
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)16 mm (0.6 inches)74%moderate
February Weather1°C (34°F)16 mm (0.6 inches)77%moderate
March Weather8°C (47°F)38 mm (1.5 inches)65%high
April Weather12°C (54°F)38 mm (1.5 inches)67%very high
May Weather17°C (63°F)91 mm (3.6 inches)81%extreme
June Weather24°C (76°F)48 mm (1.9 inches)82%extreme
July Weather26°C (80°F)45 mm (1.8 inches)82%extreme
August Weather25°C (77°F)59 mm (2.3 inches)84%extreme
September Weather22°C (72°F)37 mm (1.5 inches)79%very high
October Weather13°C (55°F)28 mm (1.1 inches)75%high
November Weather7°C (45°F)10 mm (0.4 inches)79%moderate
December Weather3°C (37°F)16 mm (0.6 inches)83%moderate

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