Rock Hill, New York climate: Normal weather by month, frost dates and records
Rock Hill's normal year runs from 14°F January nights to 80°F July afternoons, with 51.9 inches of precipitation and 58 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −10°C, July highs of 26°C, 1,318 mm of precipitation a year.
- NOAA stationRock Hill (3 mi SW)
- Station IDUSC00307210
- Location41.59°N 74.61°W
- Elevation1,270 ft (387 m)
- From the center2 miles
- Population (census place)2,530
On October 22, the normal high in Rock Hill is 57°F and the normal low 35°F, and the chance of measurable rain or snow is 33%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rock Hill.
- Jan 32° 14°
- Feb 35° 12°
- Mar 44° 20°
- Apr 56° 32°
- May 67° 44°
- Jun 75° 53°
- Jul 80° 58°
- Aug 78° 56°
- Sep 71° 48°
- Oct 59° 37°
- Nov 47° 28°
- Dec 36° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Rock Hill each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 14°F. The most precipitation falls in October (5.06 in), the least in February (3.14 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 14°F | 22.9°F | 3.73 | 16.5 | 11 | <1 | 30 | 9 h 30 min |
| February | 35°F | 12°F | 23.7°F | 3.14 | 10.8 | 9 | <1 | 28 | 10 h 40 min |
| March | 44°F | 20°F | 32.0°F | 4.10 | 12.9 | 11 | <1 | 25 | 11 h 50 min |
| April | 56°F | 32°F | 44.4°F | 4.02 | 2.0 | 11 | <1 | 17 | 13 h 20 min |
| May | 67°F | 44°F | 55.3°F | 4.18 | 0.0 | 13 | <1 | 2 | 14 h 30 min |
| June | 75°F | 53°F | 64.0°F | 5.01 | 0.0 | 11 | <1 | <1 | 15 h 10 min |
| July | 80°F | 58°F | 68.7°F | 4.76 | 0.0 | 10 | 1 | <1 | 15 h |
| August | 78°F | 56°F | 67.3°F | 4.73 | 0.0 | 10 | <1 | <1 | 13 h 50 min |
| September | 71°F | 48°F | 59.6°F | 4.76 | 0.0 | 9 | <1 | <1 | 12 h 30 min |
| October | 59°F | 37°F | 48.4°F | 5.06 | 0.7 | 10 | <1 | 7 | 11 h 10 min |
| November | 47°F | 28°F | 37.6°F | 3.78 | 2.0 | 10 | <1 | 23 | 9 h 50 min |
| December | 36°F | 20°F | 28.1°F | 4.63 | 13.0 | 12 | <1 | 28 | 9 h 10 min |
| Year (annual) | 57°F | 35°F | 46.0°F | 51.90 | 57.9 | 126 | 2 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −10°C | −5.1°C | 95 mm | 42 cm |
| February | 2°C | −11°C | −4.6°C | 80 mm | 27 cm |
| March | 7°C | −7°C | 0.0°C | 104 mm | 33 cm |
| April | 13°C | 0°C | 6.9°C | 102 mm | 5 cm |
| May | 19°C | 6°C | 12.9°C | 106 mm | 0 cm |
| June | 24°C | 12°C | 17.8°C | 127 mm | 0 cm |
| July | 26°C | 14°C | 20.4°C | 121 mm | 0 cm |
| August | 26°C | 13°C | 19.6°C | 120 mm | 0 cm |
| September | 22°C | 9°C | 15.3°C | 121 mm | 0 cm |
| October | 15°C | 3°C | 9.1°C | 129 mm | 2 cm |
| November | 9°C | −2°C | 3.1°C | 96 mm | 5 cm |
| December | 2°C | −7°C | −2.2°C | 118 mm | 33 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00307210; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Rock Hill?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00307210.
When is the last frost in Rock Hill?
In Rock Hill, the last spring frost (32°F) comes after May 7 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 7 in half of years and before September 25 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 71 year in 10 after May 22; 9 in 10 after April 25
- First autumn frost, half of years before
- October 71 year in 10 before September 25; 9 in 10 before October 22
NOAA puts the median frost-free season at 152 days, and the season without a hard freeze (28°F) at 176 days.
A hard freeze (28°F) comes after April 27 in half of springs and before October 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rock Hill in zone 6a in ZIP code 12775.
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00307210; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Rock Hill?
In a normal year in Rock Hill, 2 days a year reach 90°F, 160 nights fall to 32°F or colder and 126 days bring measurable precipitation.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 46high of 32°F or less
- Days with 0.01 inch of precipitation
- 126a normal year
- Days with 1 inch of snow or more
- 16a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00307210.
How sunny is Rock Hill?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Rock Hill, 3.8 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.8 |
| February | 67% | 2.6 |
| March | 67% | 3.6 |
| April | 68% | 4.6 |
| May | 68% | 5.3 |
| June | 72% | 5.8 |
| July | 78% | 5.9 |
| August | 76% | 5.1 |
| September | 75% | 4.2 |
| October | 68% | 2.8 |
| November | 68% | 2.0 |
| December | 61% | 1.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Rock Hill need?
A normal year in Rock Hill brings 7,236 heating degree days, 35% more than the median U.S. place (5,373), and 339 cooling degree days, 63% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,154 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,305 | 0 |
| February | 1,156 | 0 |
| March | 1,023 | 0 |
| April | 621 | 2 |
| May | 314 | 12 |
| June | 88 | 58 |
| July | 22 | 135 |
| August | 34 | 104 |
| September | 190 | 28 |
| October | 517 | 1 |
| November | 822 | 0 |
| December | 1,144 | 0 |
| Year (annual) | 7,236 | 339 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00307210. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Rock Hill been warmer than normal lately?
2021 averaged 47.9°F, 1.9°F above the 1991-2020 normal of 46.0°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.9°F | +1.9°F | 61.08 | 52.0 |
Source: observed years: ACIS, station USC00307210. A year counts only with all twelve months complete.
How does Rock Hill's climate compare?
Rock Hill is warmer than 42 of the other 130 places with their own NOAA record in New York, and wetter than 113. Across the 7,247 U.S. stations with normals, its annual mean of 46.0°F is warmer than 23%.
In the Köppen classification computed from these normals, Rock Hill is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Rock Hill share this climate record?
9 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Monticello, NY7,228 people · 6 mi NW
- South Fallsburg, NY1,850 people · 8 mi N
- Wurtsboro, NY1,086 people · 7 mi E
- Woodridge, NY709 people · 9 mi N
- Cragsmoor, NY542 people · 13 mi NE
- Wurtsboro Hills, NY519 people · 5 mi E
- Kiamesha Lake, NY348 people · 7 mi NW
- Mountain Dale, NY289 people · 8 mi NE
- Bridgeville, NY72 people · 3 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Rock Hill's climate
What is the coldest month in Rock Hill?
January, with a normal high of 32°F and a normal low of 14°F. The warmest is July (80°F by day, 58°F at night).
Does it snow in Rock Hill?
Yes: 58 inches in a normal year, falling on 23 days with 0.1 inch or more, the most in January (16.5 inches).
What is the rainiest month in Rock Hill?
October, with 5.06 in of precipitation in a normal year; the driest is February with 3.14 in.
What plant hardiness zone is Rock Hill in?
The USDA's 2023 map puts Rock Hill in zone 6a in ZIP code 12775.
How late can frost come in Rock Hill?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New York climateThe statewide normals and every place in the state
- Middletown, NY12 miles from this station, 49.7°F a year
- Port Jervis, NY14 miles from this station, 48.8°F a year
- Matamoras, PA15 miles from this station, 48.3°F a year
- Liberty, NY16 miles from this station, 45.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made