Rock Hill York County, SC Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Rock Hill York County's primary NOAA station, ROCK HILL YORK CO AP.
The climate verdict for Rock Hill York County
Rock Hill York County, South Carolina has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 61°F. It scores 92/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 92% of them.
- 61°F
- average temperature, NOAA 1991-2020 normal
- 92/100
- comfort score, above 92% of station-mapped location scores
- 42.4"
- precipitation, annual total
- 218 days
- growing season, frost-free days
Rock Hill York County: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00053871 · Rock Hill York County, SC 61°F mean · 42.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 61°F
- RANK-UPPER #5,283
- PHOTO-FINISH ≈ Brinkley
- PRCP-MID 42.4"
- SWING-MID 38°F
- COMF-TOP 92/100
- LOAD-MIX H/C balanced
- STN-1 USW00053871
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Brinkley, AR (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every SC station list.
- Rock Hill York… (this station) 61°F
- Hot Hobart, OK 61°F
- Near Brinkley, AR 61°F
- Near Fittstown, OK 61°F
- Near High Point, NC 61°F
Climate Living Index · Rock Hill York County
Rock Hill York County: 80/100 · grade B
Rock Hill York County publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Rock Hill York County, not an official NOAA rating. Rankings still use Comfort Score 92/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 75 calendar days | 84/100 · B |
| Annual temperature balance | 61.0°F · 6.5° from 67.5°F | 80/100 · B |
| Frost-free season | 218 days/year | 76/100 · B |
| Precipitation balance | 42.4 in · 7.4 from 35 in | 74/100 · B |
Rock Hill York County · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rock Hill York County is a temperate Köppen climate: Cfa
Coldest-month mean 41.6°F and warmest-month mean 79.8°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 79.8°F
- Coldest month
- 41.6°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Rock Hill York County sits across the climate record
Three NOAA fields for Rock Hill York County's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 23% warmest
- Among 6,861 stations, Rock Hill York County sits in the warmer third of annual means.
- Annual precipitation
- 63rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 72%
- Warmest-to-coldest month gap for Rock Hill York County is compact versus 6,861 complete station-years.
How Rock Hill York County compares across U.S. station-mapped locations
Rock Hill York County's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
92 Top 8% score exceeds 92% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 52°F (11°C) | 31°F (-1°C) | 42°F (5°C) | 3.5" | 18.7 | 0.0 |
| February | 57°F (14°C) | 34°F (1°C) | 45°F (7°C) | 3.1" | 13.8 | 0.0 |
| March | 64°F (18°C) | 40°F (5°C) | 52°F (11°C) | 3.8" | 7.4 | 0.0 |
| April | 74°F (23°C) | 48°F (9°C) | 61°F (16°C) | 3.5" | 0.7 | 0.3 |
| May | 80°F (27°C) | 57°F (14°C) | 69°F (20°C) | 3.2" | 0.0 | 2.4 |
| June | 87°F (31°C) | 66°F (19°C) | 76°F (25°C) | 4.0" | 0.0 | 11.8 |
| July | 90°F (32°C) | 69°F (21°C) | 80°F (27°C) | 4.0" | 0.0 | 18.3 |
| August | 89°F (31°C) | 68°F (20°C) | 78°F (26°C) | 4.0" | 0.0 | 15.6 |
| September | 83°F (28°C) | 62°F (17°C) | 72°F (22°C) | 3.4" | 0.0 | 5.9 |
| October | 73°F (23°C) | 49°F (10°C) | 61°F (16°C) | 3.0" | 1.0 | 0.4 |
| November | 63°F (17°C) | 39°F (4°C) | 51°F (11°C) | 3.3" | 7.8 | 0.0 |
| December | 55°F (13°C) | 33°F (1°C) | 44°F (7°C) | 3.6" | 16.0 | 0.0 |
The year, day by day
Rock Hill York County works both ends of the calendar. Normal highs climb to 91°F by July 10 and hold at or above 90°F on 32 dates, then normal lows drop to freezing or below on 43 dates, bottoming at 31°F around January 15.
When the heat sits
Normal highs reach 90°F from July 1 through August 1, covering 32 dates. The broader mild season, normal highs of 70°F or more, runs April 4 to October 25.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into February 5, then returns to freezing around December 25, covering 43 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is July 7, when 39% of years recorded at least a hundredth of an inch. The driest is April 16 at 31%. Summed across the calendar, that is about 125 wet dates a year.
The widest day
April 18 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rock Hill York County.
Monthly Precipitation
Average monthly rainfall
10.4 days with precipitation
10.2 days with precipitation
10.4 days with precipitation
9.2 days with precipitation
10.6 days with precipitation
10.7 days with precipitation
12.1 days with precipitation
10.8 days with precipitation
9.5 days with precipitation
9.8 days with precipitation
9.8 days with precipitation
11.2 days with precipitation
Rock Hill York County spreads its precipitation across the year
Neither half of the year dominates here: June through August take 28% of the annual total and December through February 24%, with neither reaching the 35% that would mark a distinct wet season. Rock Hill York County has no dry season to plan around, though it does carry a 38.2°F seasonal spread.
The gap between the wettest and driest month still matters: July averages 4.0" and October 3.0". The three wettest months together take 28% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Rock Hill York County's precipitation splits across the calendar
About 125 days a year record measurable precipitation here, carrying 42.4" between them, or roughly 0.34 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
November 4
50% probability date
Last Spring Freeze
March 31
50% probability date
Growing Season
218 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,141
Higher = more heating needed
Cooling Degree Days
1,706
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside SC closest to Rock Hill York County on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (61°F here).
- Brinkley, AR 61°F · 0.0°F off
- Fittstown, OK 61°F · 0.0°F off
- High Point, NC 61°F · 0.0°F off
- Hobart, OK 61°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (42.4" here), excluding temperature-peer places.
- Tipton, IN 42.4" · 0.0" off
- Cincinnati, OH 42.4" · 0.0" off
- Mckeesport, PA 42.4" · 0.0" off
- Centerville, TX 42.4" · 0.0" off
Data-derived climate profile
How Rock Hill York County's climate pattern fits together
mixed demand · moderate · mid swing
July and January mark the typical warm and cold ends of the calendar in Rock Hill York County's middle-range seasonal profile. The measured spread is 38.2°F. The annual average is 61°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Rock Hill York County's normal, at 3,141 and 1,706 degree days respectively. Neither total exceeds the other by more than two to one, so the record is better read as a mixed-demand calendar than as heating-led or cooling-led.
A roughly 218-day frost-free season sits inside this mixed heating-and-cooling profile. Start and end dates matter because both sides of the thermostat register during a normal year.
Rock Hill York County's 42.4 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Rock Hill York County's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Rock Hill York County, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Rock Hill York County's climate
How much rain does Rock Hill York County get? ▼
How many days above 90°F does Rock Hill York County get? ▼
How much energy does heating and cooling require in Rock Hill York County? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rock Hill York County's primary station: ROCK HILL YORK CO AP (USW00053871). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Rock Hill York County; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Rock Hill York County comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.