York 3 SSW Pump Station, Pennsylvania climate: Climate normals at a NOAA weather station
York 3 SSW Pump Station's normal year runs from 21°F January nights to 88°F July afternoons, with 46.5 inches of precipitation and 25 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.2°C, January lows of −6°C, July highs of 31°C, 1,180 mm of precipitation a year.
- NOAA stationYork 3 SSW Pump Station
- Station IDUSC00369933
- Location39.92°N 76.75°W
- Elevation390 ft (119 m)
On October 23, the normal high in York 3 SSW Pump Station is 66°F and the normal low 40°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for York 3 SSW Pump Station.
- Jan 41° 21°
- Feb 45° 23°
- Mar 55° 30°
- Apr 67° 40°
- May 77° 50°
- Jun 84° 59°
- Jul 88° 63°
- Aug 86° 62°
- Sep 80° 55°
- Oct 68° 43°
- Nov 56° 33°
- Dec 45° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at York 3 SSW Pump Station each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 21°F. The most precipitation falls in September (5.10 in), the least in February (2.81 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 41°F | 21°F | 31.2°F | 3.27 | 8.5 | 10 | <1 | 27 | 9 h 40 min |
| February | 45°F | 23°F | 34.3°F | 2.81 | 8.2 | 10 | <1 | 23 | 10 h 40 min |
| March | 55°F | 30°F | 42.4°F | 4.01 | 3.9 | 12 | <1 | 19 | 11 h 50 min |
| April | 67°F | 40°F | 53.6°F | 3.62 | 0.2 | 12 | <1 | 7 | 13 h 10 min |
| May | 77°F | 50°F | 63.1°F | 4.20 | 0.0 | 13 | 2 | 1 | 14 h 20 min |
| June | 84°F | 59°F | 71.2°F | 4.29 | 0.0 | 12 | 6 | <1 | 15 h |
| July | 88°F | 63°F | 75.4°F | 4.52 | 0.0 | 11 | 10 | <1 | 14 h 50 min |
| August | 86°F | 62°F | 73.8°F | 3.96 | 0.0 | 10 | 7 | <1 | 13 h 50 min |
| September | 80°F | 55°F | 67.1°F | 5.10 | 0.0 | 10 | 2 | <1 | 12 h 30 min |
| October | 68°F | 43°F | 55.6°F | 3.94 | 0.0 | 8 | <1 | 5 | 11 h 10 min |
| November | 56°F | 33°F | 44.4°F | 3.22 | 0.5 | 10 | <1 | 15 | 10 h |
| December | 45°F | 26°F | 35.5°F | 3.52 | 3.3 | 11 | <1 | 24 | 9 h 20 min |
| Year (annual) | 66°F | 42°F | 54.0°F | 46.46 | 24.6 | 127 | 28 | 120 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −6°C | −0.4°C | 83 mm | 22 cm |
| February | 7°C | −5°C | 1.3°C | 71 mm | 21 cm |
| March | 13°C | −1°C | 5.8°C | 102 mm | 10 cm |
| April | 20°C | 4°C | 12.0°C | 92 mm | 1 cm |
| May | 25°C | 10°C | 17.3°C | 107 mm | 0 cm |
| June | 29°C | 15°C | 21.8°C | 109 mm | 0 cm |
| July | 31°C | 17°C | 24.1°C | 115 mm | 0 cm |
| August | 30°C | 16°C | 23.2°C | 101 mm | 0 cm |
| September | 27°C | 13°C | 19.5°C | 130 mm | 0 cm |
| October | 20°C | 6°C | 13.1°C | 100 mm | 0 cm |
| November | 13°C | 1°C | 6.9°C | 82 mm | 1 cm |
| December | 7°C | −3°C | 1.9°C | 89 mm | 8 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00369933; 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.
Which months are mildest at York 3 SSW Pump Station?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (8).
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 USC00369933.
When is the last frost at York 3 SSW Pump Station?
In York 3 SSW Pump Station, the last spring frost (32°F) comes after April 26 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 19 in half of years and before October 5 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
- April 261 year in 10 after May 13; 9 in 10 after April 7
- First autumn frost, half of years before
- October 191 year in 10 before October 5; 9 in 10 before November 1
NOAA puts the median frost-free season at 177 days, and the season without a hard freeze (28°F) at 203 days.
A hard freeze (28°F) comes after April 8 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts York 3 SSW Pump Station in zone 7a in ZIP code 17403, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 7a: the coldest night of a typical year reaches 0°F (26 complete years).
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00369933; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 at York 3 SSW Pump Station?
In a normal year in York 3 SSW Pump Station, 28 days a year reach 90°F, 120 nights fall to 32°F or colder and 127 days bring measurable precipitation.
- Days at 90°F or more
- 28a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 120a normal year
- Days that stay below freezing
- 13high of 32°F or less
- Days with 0.01 inch of precipitation
- 127a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1894) is 107°F, on July 2, 1901; the lowest is −21°F, on January 28, 1925.
The wettest calendar year on that record is 1972, with 59.84 in; the snowiest season is 1957–58, with 78.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00369933; records: ACIS (NOAA Regional Climate Centers), station USC00369933. Records use complete months only; a month missing more than three days is left out.
How sunny is it at York 3 SSW Pump Station?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds at York 3 SSW Pump Station, 4.0 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 2.0 |
| February | 69% | 2.9 |
| March | 68% | 3.8 |
| April | 72% | 5.0 |
| May | 72% | 5.5 |
| June | 78% | 6.2 |
| July | 82% | 6.2 |
| August | 80% | 5.4 |
| September | 76% | 4.3 |
| October | 72% | 3.2 |
| November | 73% | 2.3 |
| December | 67% | 1.8 |
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 many heating and cooling degree days does York 3 SSW Pump Station record?
A normal year at York 3 SSW Pump Station brings 5,017 heating degree days, 7% fewer than the median U.S. place (5,373), and 1,025 cooling degree days, 13% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,556 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,046 | 0 |
| February | 861 | 0 |
| March | 703 | 1 |
| April | 356 | 14 |
| May | 130 | 71 |
| June | 19 | 205 |
| July | 0 | 322 |
| August | 2 | 274 |
| September | 58 | 121 |
| October | 309 | 18 |
| November | 618 | 0 |
| December | 914 | 0 |
| Year (annual) | 5,017 | 1,025 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00369933. 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.
How does York 3 SSW Pump Station's climate compare?
York 3 SSW Pump Station is warmer than 100 of the 108 places with their own NOAA record in Pennsylvania, and wetter than 73. Across the 7,247 U.S. stations with normals, its annual mean of 54.0°F is warmer than 57%.
In the Köppen classification computed from these normals, York 3 SSW Pump Station is Dfa: continental, no dry season, hot 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 York 3 SSW Pump Station share this climate record?
17 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.
- Shiloh, PA11,022 people · 4 mi NW
- East York, PA8,868 people · 5 mi NE
- West York, PA5,127 people · 3 mi N
- Spry, PA4,857 people · 3 mi E
- Grantley, PA4,762 people · 2 mi NE
- Emigsville, PA3,942 people · 6 mi N
- Stonybrook, PA3,662 people · 8 mi NE
- Valley View, PA2,963 people · 3 mi NE
- Pleasureville, PA2,886 people · 6 mi N
- Hallam, PA2,808 people · 10 mi NE
- North York, PA2,268 people · 4 mi N
- Tyler Run, PA2,046 people · 3 mi E
- Queens Gate, PA1,441 people · 4 mi NE
- Yorklyn, PA1,402 people · 8 mi NE
- Yoe, PA1,063 people · 6 mi E
- New Salem, PA832 people · 2 mi W
- Yorkana, PA238 people · 10 mi NE
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 York 3 SSW Pump Station's climate
What is the coldest month at York 3 SSW Pump Station?
January, with a normal high of 41°F and a normal low of 21°F. The warmest is July (88°F by day, 63°F at night).
Does it snow at York 3 SSW Pump Station?
Yes: 25 inches in a normal year, falling on 10 days with 0.1 inch or more, the most in January (8.5 inches).
What is the rainiest month at York 3 SSW Pump Station?
September, with 5.10 in of precipitation in a normal year; the driest is February with 2.81 in.
What plant hardiness zone is York 3 SSW Pump Station in?
The USDA's 2023 map puts York 3 SSW Pump Station in zone 7a in ZIP code 17403, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 0°F (26 years, 1991-2020): zone 7a.
How late can frost come at York 3 SSW Pump Station?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- York, PA7 miles from this station, 52.4°F a year
- Millers (4 mi NE), MD14 miles from this station, 53.6°F a year
- Hanover, PA18 miles from this station, 52.6°F a year
- Safe Harbor Dam, PA19 miles from this station, 54.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made