Oswego weather in December: Oswego, New York: normal highs, lows, rain and records for December
Oswego in December has a normal high of 37°F and a normal low of 26°F, a daily mean of 31°F, falling from 41°F on the 1st to 33°F by the 31st. Measurable precipitation falls on 19 days in a normal December, 3.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 3°C and low of −3°C, 99 mm of precipitation and 78 cm of snow in December.
- NOAA stationOswego
- Station IDUSC00306314
- Location43.45°N 76.54°W
- Elevation324 ft (99 m)
- Population17,047
- Jan 31° 19°
- Feb 33° 20°
- Mar 41° 27°
- Apr 53° 37°
- May 66° 48°
- Jun 75° 57°
- Jul 80° 63°
- Aug 79° 62°
- Sep 72° 55°
- Oct 59° 45°
- Nov 47° 35°
- Dec 37° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Oswego in December?
The normal high is 37°F and the normal low 26°F, for a daily mean of 31.3°F. December is 10.1°F cooler than November and 6.3°F warmer than January. December is the 10th warmest month of the year in Oswego and the 4th wettest. Across the month the normal high falls 8°F, from 41°F on December 1 to 33°F on December 31. From one year to the next December's mean temperature typically moves about 4.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 27°F and 35°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 64%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 41°F | 31°F | 59% | 34% |
| December 8 | 39°F | 28°F | 60% | 34% |
| December 15 | 37°F | 26°F | 61% | 34% |
| December 22 | 35°F | 24°F | 62% | 34% |
| December 31 | 33°F | 22°F | 64% | 34% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 41°F | 31°F | 59% | 34% | 9 h 10 min |
| December 2 | 41°F | 30°F | 59% | 34% | 9 h 10 min |
| December 3 | 41°F | 30°F | 59% | 34% | 9 h 10 min |
| December 4 | 40°F | 30°F | 60% | 34% | 9 h 10 min |
| December 5 | 40°F | 29°F | 60% | 34% | 9 h 10 min |
| December 6 | 40°F | 29°F | 60% | 34% | 9 h 10 min |
| December 7 | 39°F | 29°F | 60% | 34% | 9 h 10 min |
| December 8 | 39°F | 28°F | 60% | 34% | 9 h |
| December 9 | 39°F | 28°F | 60% | 34% | 9 h |
| December 10 | 38°F | 28°F | 61% | 34% | 9 h |
| December 11 | 38°F | 27°F | 61% | 34% | 9 h |
| December 12 | 38°F | 27°F | 61% | 34% | 9 h |
| December 13 | 37°F | 27°F | 61% | 34% | 9 h |
| December 14 | 37°F | 27°F | 61% | 34% | 9 h |
| December 15 | 37°F | 26°F | 61% | 34% | 9 h |
| December 16 | 37°F | 26°F | 62% | 34% | 9 h |
| December 17 | 36°F | 26°F | 62% | 34% | 9 h |
| December 18 | 36°F | 25°F | 62% | 34% | 9 h |
| December 19 | 36°F | 25°F | 62% | 34% | 9 h |
| December 20 | 35°F | 25°F | 62% | 34% | 9 h |
| December 21 | 35°F | 25°F | 62% | 34% | 9 h |
| December 22 | 35°F | 24°F | 62% | 34% | 9 h |
| December 23 | 35°F | 24°F | 62% | 34% | 9 h |
| December 24 | 35°F | 24°F | 63% | 34% | 9 h |
| December 25 | 34°F | 23°F | 63% | 34% | 9 h |
| December 26 | 34°F | 23°F | 63% | 34% | 9 h |
| December 27 | 34°F | 23°F | 63% | 34% | 9 h |
| December 28 | 34°F | 23°F | 63% | 34% | 9 h |
| December 29 | 33°F | 22°F | 63% | 34% | 9 h |
| December 30 | 33°F | 22°F | 63% | 34% | 9 h |
| December 31 | 33°F | 22°F | 64% | 34% | 9 h |
- Normal high
- 37°FDecember average
- Normal low
- 26°FDecember average
- Precipitation
- 3.89 inmonth total
- Days with precipitation
- 190.01 inch or more
- Snowfall
- 30.6 inmonth total
- Nights at 32°F or colder
- 24
- Daylight
- 9 h 10 min to 9 hDecember 1 to December 31
- Sunshine
- 47%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00306314; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Oswego in December?
On a given December day the chance of 0.01 inch or more is 61% on average, highest around December 31 (64%). In all, 3.89 in falls on 19 days of a normal December.
In a normal December in Oswego, 24 nights fall to freezing, 10 days stay below freezing all day and snowfall averages 30.6 inches.
Snow falls on 13 days in a normal December, and an inch or more covers the ground on 17 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00306314.
What are the records for December in Oswego?
The warmest December temperature on Oswego's official record (since 1926) is 69°F, on December 7, 1998; the coldest is −23°F, on December 29, 1933. The wettest December brought 6.88 in (1958); the snowiest, 85.8 inches (1958).
The December mean against the 1991-2020 normal of 31.3°F: 2021 38.3°F (+7.0), 2022 34.2°F (+2.9), 2023 40.1°F (+8.8), 2024 33.5°F (+2.2), 2025 28.8°F (−2.5). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.3°F | +7.0°F | 2.42 in |
| 2022 | 34.2°F | +2.9°F | 2.10 in |
| 2023 | 40.1°F | +8.8°F | 3.96 in |
| 2024 | 33.5°F | +2.2°F | 2.85 in |
| 2025 | 28.8°F | −2.5°F | 3.80 in |
Source: records: ACIS, NWS threaded record OSWN6thr; recent months: ACIS, station USC00306314. Records and recent months use complete months only.
How does December in Oswego compare across New York?
Across the 131 places PlainClimate covers in New York, December normal highs run from 29°F in Lake Placid to 47°F in Wantagh; Oswego's is 37°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.