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United States weather

Weather in Onondaga County, New York for December 2025

Your guide to Onondaga County weather in December - trends and predictions

    Official Weather Alert ⚠️

  • Winter Weather Advisory - See hour by hour.

    • Snow Forecast ❄️

  • The climate of Onondaga County in December is quite snowy, averaging 12 snowy days.
    According to Onondaga County snow forecast for December 2025, 7 snowy days are expected until the end of the month. The closest date with snow is Tuesday, December 23.

    • Temperatures

  • Until now, December 2025 in Onondaga County is cooler than usual, with temperatures averaging -0.3 °F, this is -2.7 °F below the typical seasonal average.

  • The forecast for the next days in Onondaga County predicts temperatures to be around -2 °F, close to the historical average.

  • In general, the average temperature in Onondaga County at the beginning of December is 2 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of -3.1 °F by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
7
Dry days
Average rainy days
12
Rainy days
Average snowy days
12
Snow days
Average temperatures
3°/-1°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
84 %
Avg humidity

Onondaga County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate rain
2°
2
Light rain
4°
3
Moderate rain
3°
4
Overcast
3°
5
Moderate or heavy snow showers
1°
6
Overcast
-0°
7
Moderate or heavy snow showers
1°
8
Overcast
2°
9
Light drizzle
3°
10
Moderate or heavy rain with thunder
7°
11
Moderate or heavy snow showers
3°
12
Partly cloudy
1°
13
Light snow showers
-0°
14
Overcast
-1°
15
Sunny
2°
16
Overcast
4°
17
Overcast
5°
18
Moderate rain
6°
19
Moderate or heavy snow showers
3°
20
Overcast
1°
21
Overcast
-0°
22
Sunny
1°
23
Weather Alert Patchy rain possible
3°
24
Overcast
2°
25
Light freezing rain
1°
26
Heavy snow
-5°
27
Light freezing rain
-3°
28
Moderate or heavy snow showers
1°
29
Blowing snow
-8°
30
Blizzard
-7°
31
Light snow
-1°

Temperatures trend during December in Onondaga County

See the weather trend as well as the moving average line

December weather in Onondaga County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Moderate rain
Moderate rain
 2° /-3° 3.5 mm 0 cm
Dec. 2 Light rain
Light rain
 4° /-2° 10.7 mm 7.2 cm
Dec. 3 Moderate rain
Moderate rain
 3° /-1° 8.6 mm 0 cm
Dec. 4 Overcast
Overcast
 3° /-3° 5.6 mm 3.3 cm
Dec. 5 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-4° 8.2 mm 3.1 cm
Dec. 6 Overcast
Overcast
 0° /-6° 0.8 mm 0 cm
Dec. 7 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-4° 0.7 mm 0.5 cm
Dec. 8 Overcast
Overcast
 2° /-4° 0.7 mm 0.5 cm
Dec. 9 Light drizzle
Light drizzle
 3° /-3° 16.5 mm 0.3 cm
Dec. 10 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 7° /0° 19.6 mm 0.6 cm
Dec. 11 Moderate or heavy snow showers
Moderate or heavy snow showers
 3° /-2° 9.2 mm 5.4 cm
Dec. 12 Partly cloudy
Partly cloudy
 1° /-4° 1.2 mm 0.9 cm
Dec. 13 Light snow showers
Light snow showers
 0° /-6° 0.4 mm 0.2 cm
Dec. 14 Overcast
Overcast
 -1° /-6° 3.8 mm 2.7 cm
Dec. 15 Sunny
Sunny
 2° /-5° 2.6 mm 1.9 cm
Dec. 16 Overcast
Overcast
 4° /-3° 0.7 mm 0 cm
Dec. 17 Overcast
Overcast
 5° /0° 3.6 mm 0 cm
Dec. 18 Moderate rain
Moderate rain
 6° /1° 19.4 mm 0 cm
Dec. 19 Moderate or heavy snow showers
Moderate or heavy snow showers
 3° /-4° 12 mm 4.9 cm
Dec. 20 Overcast
Overcast
 1° /-4° 1.2 mm 0.4 cm
Dec. 21 Overcast
Overcast
 0° /-5° 0.7 mm 0.5 cm
Dec. 22 Sunny
Sunny
 1° /-5° 0 mm 0 cm
Dec. 23 Patchy rain possible
Patchy rain possible
 3° /1° 3.1 mm 0.6 cm
Dec. 24 Overcast
Overcast
 2° /-2° 0 mm 0 cm
Dec. 25 Light freezing rain
Light freezing rain
 1° /-3° 0.1 mm 0.1 cm
Dec. 26 Heavy snow
Heavy snow
 -5° /-8° 9.2 mm 6.7 cm
Dec. 27 Light freezing rain
Light freezing rain
 -3° /-11° 0.3 mm 0.2 cm
Dec. 28 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-4° 2 mm 0.4 cm
Dec. 29 Blowing snow
Blowing snow
 -8° /-9° 0.5 mm 0 cm
Dec. 30 Blizzard
Blizzard
 -7° /-8° 4.8 mm 1 cm
Dec. 31 Light snow
Light snow
 -1° /-10° 1 mm 0.7 cm
Next
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.
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Onondaga County in December - FAQ

What are the expected maximum and minimum temperatures in Onondaga County during December?
Brace for cold days with temperatures not exceeding 3° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Onondaga County during December?
Significant rainfall exceeding 178.3 mm is expected in Onondaga County during December, occurring over more than 12 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 31.045 cm during December, occurring over 12 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

Track daily snowfall levels and discover Onondaga County’s snowy potential this December ❄️
On average, Onondaga County sees 12 snowy days during December, with approximately 31 cm of total snowfall.

December rainfall patterns in Onondaga County

Explore the daily rainfall trends and prepare for Onondaga Countys December weather 💧
Typically, Onondaga County has 12 rainy days in December with a total of 178.3 mm of rainfall.
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Syracuse
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Location coordinates 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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