Last updated: June 24, 2025
In December, the average temperature in Syracuse, United States hovers around -1°C (30°F). Expect chilly conditions, with minimum temperatures dropping to -13°C (10°F) and peaks reaching up to 14°C (57°F). This time of year also brings about 48 mm (1.9 in) of precipitation over 10 days, coupled with a high average humidity of 88%. Prepare for a damp, cold experience!
In December in Syracuse, the average temperature is -1°C (30°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -13°C (10°F). Be prepared for a wide range of temperatures, so pack accordingly for your trip.
In Syracuse in December, the precipitation amount is 48 mm (1.9 in) spread over a period of 10 days.
In Syracuse in December humidity is 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.
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.
UV Risk Categories
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.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 54 mm (2.1 inches) | 91% | moderate |
| February Weather | 0°C (33°F) | 60 mm (2.4 inches) | 92% | moderate |
| March Weather | 5°C (42°F) | 52 mm (2.1 inches) | 84% | high |
| April Weather | 10°C (49°F) | 62 mm (2.4 inches) | 74% | very high |
| May Weather | 15°C (59°F) | 48 mm (1.9 inches) | 62% | very high |
| June Weather | 22°C (71°F) | 16 mm (0.6 inches) | 56% | extreme |
| July Weather | 26°C (80°F) | 7 mm (0.3 inches) | 44% | extreme |
| August Weather | 25°C (77°F) | 13 mm (0.5 inches) | 37% | very high |
| September Weather | 19°C (67°F) | 30 mm (1.2 inches) | 46% | very high |
| October Weather | 10°C (50°F) | 41 mm (1.6 inches) | 67% | high |
| November Weather | 5°C (41°F) | 37 mm (1.5 inches) | 84% | moderate |
| December Weather | -1°C (30°F) | 48 mm (1.9 inches) | 88% | moderate |