Rock Hill, NY Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Rock Hill's primary NOAA station, ROCK HILL 3 SW.
The climate verdict for Rock Hill
Water is the standout signal in Rock Hill, New York: 51.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 46°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 46°F
- annual average temperature (NOAA normal)
- 44/100
- comfort score, above 10% of station-mapped location scores
- 51.9"
- annual precipitation · 58" snow
- 153 days
- frost-free growing season
Rock Hill: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00307210 · Rock Hill, NY 46°F mean · 51.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,578
- PHOTO-FINISH ≈ Pittsfield
- PRCP-WET 51.9"
- SWING-WIDE 46°F
- COMF-LOW 44/100
- LOAD-HEAT 7,236 HDD
- STN-1 USC00307210
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Pittsfield, MA (+ 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 NY station list.
- Rock Hill (this station) 46°F
- Cold Wiscasset, ME 46°F
- Hot Mccammon, ID 46°F
- Near Pittsfield, MA 46°F
- Near Huntsville Mona…, UT 46°F
Climate Living Index · Rock Hill
Rock Hill: 29/100 · grade F
Rock Hill publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Rock Hill, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 51.9 in · 16.9 from 35 in | 40/100 · D |
| Normal heat + freeze calendar | 166 calendar days | 35/100 · F |
| Frost-free season | 153 days/year | 28/100 · F |
| Annual temperature balance | 46.0°F · 21.5° from 67.5°F | 23/100 · F |
| Snowfall burden | 57.9 inches/year | 17/100 · F |
Rock Hill · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rock Hill is a continental Köppen climate: Dfb
Coldest-month mean 22.9°F and warmest-month mean 68.7°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 68.7°F
- Coldest month
- 22.9°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 · heating-led station
Where Rock Hill sits across the climate record
Three NOAA fields for Rock Hill's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 77%
- Among 6,861 stations, Rock Hill sits in the cooler third of annual means.
- Annual precipitation
- Top 15% wettest
- Rock Hill's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 63rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Rock Hill compares across U.S. station-mapped locations
Rock Hill's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 32°F (0°C) | 14°F (-10°C) | 23°F (-5°C) | 3.7" | 16.5" | 30.4 | 0.0 |
| February | 35°F (2°C) | 12°F (-11°C) | 24°F (-5°C) | 3.1" | 10.8" | 27.8 | 0.0 |
| March | 44°F (7°C) | 20°F (-7°C) | 32°F (0°C) | 4.1" | 12.9" | 24.6 | 0.0 |
| April | 56°F (13°C) | 32°F (0°C) | 44°F (7°C) | 4.0" | 2.0" | 17.1 | 0.1 |
| May | 67°F (19°C) | 44°F (6°C) | 55°F (13°C) | 4.2" | 0.0" | 2.4 | 0.1 |
| June | 75°F (24°C) | 53°F (12°C) | 64°F (18°C) | 5.0" | 0.0" | 0.0 | 0.4 |
| July | 80°F (26°C) | 58°F (14°C) | 69°F (20°C) | 4.8" | 0.0" | 0.0 | 1.4 |
| August | 78°F (26°C) | 56°F (13°C) | 67°F (20°C) | 4.7" | 0.0" | 0.0 | 0.2 |
| September | 71°F (22°C) | 48°F (9°C) | 60°F (15°C) | 4.8" | 0.0" | 0.2 | 0.1 |
| October | 59°F (15°C) | 37°F (3°C) | 48°F (9°C) | 5.1" | 0.7" | 7.1 | 0.0 |
| November | 47°F (9°C) | 28°F (-2°C) | 38°F (3°C) | 3.8" | 2.0" | 22.6 | 0.0 |
| December | 36°F (2°C) | 20°F (-7°C) | 28°F (-2°C) | 4.6" | 13.0" | 28.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 80°F around July 23, short of 90°F on every date, while 166 dates carry a normal low at or below freezing, the coldest 11°F near February 7.
The freezing stretch
The normal low stays at or below 32°F into April 14, then returns to freezing around November 1, covering 166 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 May 9, when 42% of years recorded at least a hundredth of an inch. The driest is September 6 at 28%. Summed across the calendar, that is about 126 wet dates a year.
The widest day
April 29 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rock Hill.
Where Rock Hill Stands Nationally
The normal water year runs well above the national norm at roughly 52 inches.
Rock Hill earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 16.5"
11.4 days with precipitation
Snow: 10.8"
8.8 days with precipitation
Snow: 12.9"
10.7 days with precipitation
Snow: 2.0"
10.8 days with precipitation
12.9 days with precipitation
10.8 days with precipitation
9.9 days with precipitation
10.1 days with precipitation
8.8 days with precipitation
Snow: 0.7"
10.4 days with precipitation
Snow: 2.0"
10.0 days with precipitation
Snow: 13.0"
11.5 days with precipitation
Rock Hill 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 22%, with neither reaching the 35% that would mark a distinct wet season. Rock Hill has no dry season to plan around, though it does carry a wide 45.8°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 5.1" and February 3.1". The three wettest months together take 29% 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.
When it rains in Rock Hill, it arrives in quantity
51.9" of precipitation falls across only about 126 wet days here, averaging 0.41 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 126 a year, 35% of all days
- Average depth per wet day
- 0.41 inches
- Most wet days
- May, about 13
- Fewest wet days
- February, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Rock Hill
Rock Hill averages 57.9 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 23 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 57.9 inches of depth.
- Days recording measurable snow: about 23 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 11% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 7
50% probability date
Last Spring Freeze
May 7
50% probability date
Growing Season
153 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,236
Higher = more heating needed
Cooling Degree Days
339
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NY closest to Rock Hill 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 (46°F here).
- Algona, IA 46°F · 0.0°F off
- Arlington, WI 46°F · 0.0°F off
- Eau Claire, WI 46°F · 0.0°F off
- Glenbrook, NV 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (51.9" here), excluding temperature-peer places.
- Jackson, KY 51.9" · 0.0" off
- Lehighton, PA 51.9" · 0.0" off
- Live Oak, FL 51.9" · 0.0" off
- Woonsocket, RI 51.9" · 0.0" off
Snow and freeze rhythm
When cold and snow define Rock Hill
heating led · wet · mid swing
Rock Hill's energy balance leans toward cold weather: 7,236 annual heating degree days against 339 for cooling. Its 45.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Rock Hill's frost-free season lasts about 153 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Rock Hill coldest normal
January
Averaging 23°F (-5°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Rock Hill typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Rock Hill snow peak
January
Rock Hill averages 57.9 inches of snow a year, with January the snowiest month on the normals.
Questions about Rock Hill's climate
How much snow does Rock Hill get? ▼
How cold does Rock Hill get in winter? ▼
How much energy does heating and cooling require in Rock Hill? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rock Hill's primary station: ROCK HILL 3 SW (USC00307210). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 3663132), not an incorporated municipality. Match rule for Rock Hill: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Rock Hill 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.