Onondaga County (Syracuse)
December
Weather in Onondaga County for December 2025
Your guide to Onondaga County weather in December - trends and predictions
With an average of 5 snowy days, Onondaga County usually enjoys a light touch of snow in December.
In general, the average temperature in Onondaga County at the beginning of December is 2.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 5.3 °F by the end of December.
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Snow Forecast ❄️
Temperatures
More
20
Dry days
6
Rainy days
5
Snow days
6°/-3°
Temperatures
20 km/h
Avg max wind
84 %
Avg humidity
Onondaga County Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  6° | 3 4° | 4  4° | 5  1° | 6  -1° | |
| 7 1° | 8  4° | 9 6° | 10  9° | 11 4° | 12  2° | 13  -1° |
| 14 1° | 15  4° | 16 6° | 17  7° | 18 7° | 19 2° | 20 1° |
| 21  -1° | 22 1° | 23 1° | 24 1° | 25 3° | 26 2° | 27 5° |
| 28 7° | 29 9° | 30 7° | 31 4° |
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Temperatures trend during December in Onondaga County
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Moderate rain | 2° /-2° | 5.2 mm | 0 cm | |
| Dec. 2 | Light rain | 6° /-1° | 1.2 mm | 0 cm | |
| Dec. 3 | Moderate rain | 4° /1° | 12.9 mm | 0 cm | |
| Dec. 4 | Overcast | 4° /-1° | 1 mm | 0.7 cm | |
| Dec. 5 | Moderate or heavy snow showers | 1° /-1° | 12.3 mm | 4.6 cm | |
| Dec. 6 | Light snow | -1° /-5° | 1.2 mm | 0 cm | |
| Dec. 7 | Moderate or heavy snow showers | 1° /-4° | 1 mm | 0.7 cm | |
| Dec. 8 | Fog | 4° /-1° | 1.1 mm | 0.8 cm | |
| Dec. 9 | Light drizzle | 6° /1° | 24.1 mm | 0 cm | |
| Dec. 10 | Moderate or heavy rain with thunder | 9° /3° | 24.5 mm | 0 cm | |
| Dec. 11 | Moderate or heavy snow showers | 4° /0° | 13.7 mm | 8.1 cm | |
| Dec. 12 | Partly cloudy | 2° /-3° | 1.8 mm | 1.3 cm | |
| Dec. 13 | Light snow showers | -1° /-4° | 0.5 mm | 0.3 cm | |
| Dec. 14 | Overcast | 1° /-5° | 0.3 mm | 0.2 cm | |
| Dec. 15 | Sunny | 4° /-3° | 0 mm | 0 cm | |
| Dec. 16 | Overcast | 6° /1° | 1.1 mm | 0 cm | |
| Dec. 17 | Patchy rain possible | 7° /3° | 5.3 mm | 0 cm | |
| Dec. 18 | Moderate rain | 7° /2° | 29.1 mm | 0 cm | |
| Dec. 19 | Moderate or heavy snow showers | 2° /-4° | 10.1 mm | 7.3 cm | |
| Dec. 20 | Sunny | 1° /-3° | 0 mm | 0 cm | |
| Dec. 21 | Cloudy | -1° /-5° | 0 mm | 0 cm | |
| Dec. 22 | Sunny | 1° /-5° | 0 mm | 0 cm | |
| Dec. 23 | Patchy rain possible | 1° /-5° | 0.6 mm | 0 cm | |
| Dec. 24 | Light drizzle | 1° /-2° | 10.4 mm | 6.4 cm | |
| Dec. 25 | Overcast | 3° /-1° | 0 mm | 0 cm | |
| Dec. 26 | Light rain | 2° /-1° | 3.2 mm | 0 cm | |
| Dec. 27 | Moderate rain | 5° /2° | 10.7 mm | 0 cm | |
| Dec. 28 | Light drizzle | 7° /2° | 0.4 mm | 0 cm | |
| Dec. 29 | Fog | 9° /3° | 5.2 mm | 0 cm | |
| Dec. 30 | Light snow showers | 7° /1° | 1 mm | 0.2 cm | |
| Dec. 31 | Overcast | 4° /-1° | 0.3 mm | 0.2 cm | |
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Important Notice
Our weather forecast for Onondaga County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Onondaga County forecast closer to your planned date for the most up-to-date weather information.
Onondaga County in December - FAQ
What are the expected maximum and minimum temperatures in Onondaga County during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below -3°.
How much rainfall should be expected in Onondaga County during December?
Significant rainfall exceeding 356.7 mm is expected in Onondaga County during December, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Onondaga County in December 2025?
Onondaga County experiences an average snowfall of 62.1 cm during December, occurring over 5 days.
What are the typical wind conditions in Onondaga County during December?
The average wind speed in Onondaga County during December is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
Onondaga County snow forecast December 2025
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December rainfall patterns in Onondaga County
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Where is Onondaga County?Get accurate weather forecasts for Onondaga County, located at latitude 43.048 and longitude -76.147. Stay updated with localized weather information tailored for Onondaga County.
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