Rock Hill weather in December: Rock Hill, South Carolina: normal highs, lows, rain and records for December
Rock Hill in December has a normal high of 55°F and a normal low of 33°F, a daily mean of 44°F, falling from 58°F on the 1st to 53°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 3.62 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 1°C, 92 mm of precipitation in December.
- NOAA stationRock Hill York County Airport
- Station IDUSW00053871
- Location34.99°N 81.06°W
- Elevation669 ft (204 m)
- From the center4 miles
- Population75,798
- Jan 52° 31°
- Feb 57° 34°
- Mar 64° 40°
- Apr 74° 48°
- May 80° 57°
- Jun 87° 66°
- Jul 90° 69°
- Aug 89° 68°
- Sep 83° 62°
- Oct 73° 49°
- Nov 63° 39°
- Dec 55° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rock Hill in December?
The normal high is 55°F and the normal low 33°F, for a daily mean of 44.2°F. December is 6.7°F cooler than November and 2.6°F warmer than January. December is the 11th warmest month of the year in Rock Hill and the 5th wettest. Across the month the normal high falls 5°F, from 58°F on December 1 to 53°F on December 31. From one year to the next December's mean temperature typically moves about 4.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 40°F and 49°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 58°F | 36°F | 35% | 18% |
| December 8 | 57°F | 34°F | 36% | 19% |
| December 15 | 55°F | 33°F | 37% | 20% |
| December 22 | 54°F | 32°F | 36% | 21% |
| December 31 | 53°F | 31°F | 35% | 21% |
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 | 58°F | 36°F | 35% | 18% | 10 h |
| December 2 | 58°F | 35°F | 35% | 18% | 10 h |
| December 3 | 58°F | 35°F | 36% | 18% | 10 h |
| December 4 | 57°F | 35°F | 36% | 18% | 10 h |
| December 5 | 57°F | 35°F | 36% | 19% | 10 h |
| December 6 | 57°F | 35°F | 36% | 19% | 10 h |
| December 7 | 57°F | 35°F | 36% | 19% | 9 h 50 min |
| December 8 | 57°F | 34°F | 36% | 19% | 9 h 50 min |
| December 9 | 56°F | 34°F | 36% | 19% | 9 h 50 min |
| December 10 | 56°F | 34°F | 36% | 19% | 9 h 50 min |
| December 11 | 56°F | 34°F | 37% | 20% | 9 h 50 min |
| December 12 | 56°F | 34°F | 37% | 20% | 9 h 50 min |
| December 13 | 56°F | 34°F | 37% | 20% | 9 h 50 min |
| December 14 | 55°F | 34°F | 37% | 20% | 9 h 50 min |
| December 15 | 55°F | 33°F | 37% | 20% | 9 h 50 min |
| December 16 | 55°F | 33°F | 37% | 20% | 9 h 50 min |
| December 17 | 55°F | 33°F | 37% | 20% | 9 h 50 min |
| December 18 | 55°F | 33°F | 36% | 20% | 9 h 50 min |
| December 19 | 54°F | 33°F | 36% | 21% | 9 h 50 min |
| December 20 | 54°F | 33°F | 36% | 21% | 9 h 50 min |
| December 21 | 54°F | 33°F | 36% | 21% | 9 h 50 min |
| December 22 | 54°F | 32°F | 36% | 21% | 9 h 50 min |
| December 23 | 54°F | 32°F | 36% | 21% | 9 h 50 min |
| December 24 | 54°F | 32°F | 35% | 21% | 9 h 50 min |
| December 25 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 26 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 27 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 28 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 29 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 30 | 53°F | 32°F | 35% | 21% | 9 h 50 min |
| December 31 | 53°F | 31°F | 35% | 21% | 9 h 50 min |
- Normal high
- 55°FDecember average
- Normal low
- 33°FDecember average
- Precipitation
- 3.62 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 16
- Daylight
- 10 h to 9 h 50 minDecember 1 to December 31
- Days at 70°F or more
- 2
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053871; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rock Hill in December?
On a given December day the chance of 0.01 inch or more is 36% on average, highest around December 13 (37%). In all, 3.62 in falls on 11 days of a normal December, 1 of them with an inch or more.
In a normal December in Rock Hill, 16 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053871.
What are the records for December in Rock Hill?
The warmest December temperature on this station's record (since 1999) is 80°F, on December 10, 2007; the coldest is 8°F, on December 24, 2022. The wettest December brought 8.78 in (2015).
The December mean against the 1991-2020 normal of 44.2°F: 2021 52.6°F (+8.4), 2022 42.4°F (−1.8), 2023 45.9°F (+1.7), 2024 43.7°F (−0.5), 2025 43.1°F (−1.1). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 52.6°F | +8.4°F | 3.89 in |
| 2022 | 42.4°F | −1.8°F | 3.67 in |
| 2023 | 45.9°F | +1.7°F | 5.89 in |
| 2024 | 43.7°F | −0.5°F | 3.49 in |
| 2025 | 43.1°F | −1.1°F | 2.00 in |
Source: records: ACIS, station USW00053871; recent months: ACIS, station USW00053871. Records and recent months use complete months only.
How does December in Rock Hill compare across South Carolina?
Across the 73 places PlainClimate covers in South Carolina, December normal highs run from 48°F in Caesars Head to 64°F in Hampton; Rock Hill's is 55°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Rock Hill in November63°F by day, 39°F at night
- Rock Hill in January52°F by day, 31°F at night
- Rock Hill through the yearEvery month, frost dates, records and recent years
- South Carolina in DecemberThe statewide normal and the warmest and coolest places
- Hampton: South Carolina's warmest Decembernormal high 64°F