Grays Landing, Pennsylvania climate: Climate normals at a NOAA weather station
Grays Landing's normal year runs from 21°F January nights to 84°F July afternoons, with 42.1 inches of precipitation and 18 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.9°C, January lows of −6°C, July highs of 29°C, 1,071 mm of precipitation a year.
- NOAA stationGrays Landing
- Station IDUSC00363451
- Location39.78°N 79.92°W
- Elevation800 ft (244 m)
On October 23, the normal high in Grays Landing is 62°F and the normal low 39°F, and the chance of measurable rain or snow is 37%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grays Landing.
- Jan 39° 21°
- Feb 42° 22°
- Mar 51° 28°
- Apr 64° 37°
- May 73° 48°
- Jun 81° 57°
- Jul 84° 62°
- Aug 83° 61°
- Sep 77° 54°
- Oct 65° 42°
- Nov 53° 31°
- Dec 43° 25°
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 Grays Landing each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 21°F. The most precipitation falls in June (4.33 in), the least in February (2.56 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 21°F | 29.6°F | 3.25 | 6.1 | 17 | <1 | 26 | 9 h 40 min |
| February | 42°F | 22°F | 31.8°F | 2.56 | 5.9 | 14 | <1 | 24 | 10 h 40 min |
| March | 51°F | 28°F | 39.4°F | 3.63 | 1.9 | 14 | <1 | 20 | 11 h 50 min |
| April | 64°F | 37°F | 50.6°F | 3.77 | 0.1 | 14 | <1 | 8 | 13 h 10 min |
| May | 73°F | 48°F | 60.6°F | 4.09 | 0.0 | 15 | 1 | 1 | 14 h 20 min |
| June | 81°F | 57°F | 68.6°F | 4.33 | 0.0 | 13 | 3 | <1 | 15 h |
| July | 84°F | 62°F | 73.1°F | 4.22 | 0.0 | 11 | 5 | <1 | 14 h 40 min |
| August | 83°F | 61°F | 71.8°F | 3.65 | 0.0 | 11 | 3 | <1 | 13 h 50 min |
| September | 77°F | 54°F | 65.3°F | 3.44 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 65°F | 42°F | 53.4°F | 3.00 | 0.0 | 11 | <1 | 3 | 11 h 10 min |
| November | 53°F | 31°F | 42.1°F | 2.98 | 0.3 | 12 | <1 | 16 | 10 h |
| December | 43°F | 25°F | 33.9°F | 3.23 | 4.1 | 16 | <1 | 24 | 9 h 20 min |
| Year (annual) | 63°F | 41°F | 51.7°F | 42.15 | 18.4 | 156 | 14 | 124 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −1.3°C | 83 mm | 15 cm |
| February | 5°C | −6°C | −0.1°C | 65 mm | 15 cm |
| March | 10°C | −2°C | 4.1°C | 92 mm | 5 cm |
| April | 18°C | 3°C | 10.3°C | 96 mm | 0 cm |
| May | 23°C | 9°C | 15.9°C | 104 mm | 0 cm |
| June | 27°C | 14°C | 20.3°C | 110 mm | 0 cm |
| July | 29°C | 17°C | 22.8°C | 107 mm | 0 cm |
| August | 28°C | 16°C | 22.1°C | 93 mm | 0 cm |
| September | 25°C | 12°C | 18.5°C | 87 mm | 0 cm |
| October | 18°C | 5°C | 11.9°C | 76 mm | 0 cm |
| November | 12°C | 0°C | 5.6°C | 76 mm | 1 cm |
| December | 6°C | −4°C | 1.1°C | 82 mm | 10 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00363451; 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 Grays Landing?
Normal highs sit between 65°F and 85°F in May, June, July, August, September and October. 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 USC00363451.
When is the last frost at Grays Landing?
In Grays Landing, the last spring frost (32°F) comes after April 28 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 21 in half of years and before October 9 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 281 year in 10 after May 14; 9 in 10 after April 15
- First autumn frost, half of years before
- October 211 year in 10 before October 9; 9 in 10 before November 1
NOAA puts the median frost-free season at 175 days, and the season without a hard freeze (28°F) at 198 days.
A hard freeze (28°F) comes after April 16 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grays Landing in zone 6b in ZIP code 15467, 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 6b: the coldest night of a typical year reaches −2°F (18 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 USC00363451; 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 Grays Landing?
In a normal year in Grays Landing, 14 days a year reach 90°F, 124 nights fall to 32°F or colder and 156 days bring measurable precipitation.
- Days at 90°F or more
- 14a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 124a normal year
- Days that stay below freezing
- 26high of 32°F or less
- Days with 0.01 inch of precipitation
- 156a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1997) is 102°F, on July 8, 2012; the lowest is −13°F, on February 1, 2026.
The wettest calendar year on that record is 2018, with 62.53 in; the snowiest season is 2009–10, with 61.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00363451; records: ACIS (NOAA Regional Climate Centers), station USC00363451. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Grays Landing?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds at Grays Landing, 3.8 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.7 |
| February | 59% | 2.5 |
| March | 62% | 3.5 |
| April | 66% | 4.7 |
| May | 67% | 5.3 |
| June | 73% | 5.9 |
| July | 75% | 5.8 |
| August | 76% | 5.2 |
| September | 74% | 4.3 |
| October | 67% | 3.0 |
| November | 66% | 2.1 |
| December | 55% | 1.5 |
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 Grays Landing record?
A normal year at Grays Landing brings 5,578 heating degree days, 4% more than the median U.S. place (5,373), and 756 cooling degree days, 17% fewer 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 3,105 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,097 | 0 |
| February | 930 | 0 |
| March | 792 | 0 |
| April | 437 | 5 |
| May | 182 | 44 |
| June | 32 | 140 |
| July | 3 | 256 |
| August | 5 | 216 |
| September | 77 | 85 |
| October | 370 | 11 |
| November | 689 | 0 |
| December | 964 | 0 |
| Year (annual) | 5,578 | 756 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00363451. 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.
Have recent years at Grays Landing been warmer than normal?
2023 averaged 52.7°F, 1.0°F above the 1991-2020 normal of 51.7°F. 2 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 52.9°F | +1.1°F | 39.38 | 15.4 |
| 2022 | 51.0°F | −0.7°F | 41.46 | 23.7 |
| 2023 | 52.7°F | +1.0°F | 36.90 | 1.8 |
Source: observed years: ACIS, station USC00363451. A year counts only with all twelve months complete.
How does Grays Landing's climate compare?
Grays Landing is warmer than 69 of the 108 places with their own NOAA record in Pennsylvania, and wetter than 31. Across the 7,247 U.S. stations with normals, its annual mean of 51.7°F is warmer than 48%.
In the Köppen classification computed from these normals, Grays Landing 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.
Questions about Grays Landing's climate
What is the coldest month at Grays Landing?
January, with a normal high of 39°F and a normal low of 21°F. The warmest is July (84°F by day, 62°F at night).
Does it snow at Grays Landing?
Yes: 18 inches in a normal year, falling on 15 days with 0.1 inch or more, the most in January (6.1 inches).
What is the rainiest month at Grays Landing?
June, with 4.33 in of precipitation in a normal year; the driest is February with 2.56 in.
What plant hardiness zone is Grays Landing in?
The USDA's 2023 map puts Grays Landing in zone 6b in ZIP code 15467, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −2°F (18 years, 1991-2020): zone 6b.
How late can frost come at Grays Landing?
In half of years the last 32°F night comes after April 28; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Point Marion, PA4 miles from this station, 52.0°F a year
- Lake Lynn, WV6 miles from this station, 52.1°F a year
- Morgantown, WV10 miles from this station, 53.8°F a year
- Uniontown, PA14 miles from this station, 52.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made