Dehart Dam, Pennsylvania climate: Climate normals at a NOAA weather station
Dehart Dam's normal year runs from 20°F January nights to 84°F July afternoons, with 50.9 inches of precipitation and 28 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.3°C, January lows of −7°C, July highs of 29°C, 1,292 mm of precipitation a year.
- NOAA stationDehart Dam
- Station IDUSC00362071
- Location40.46°N 76.75°W
- Elevation537 ft (164 m)
On October 23, the normal high in Dehart Dam is 61°F and the normal low 39°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dehart Dam.
- Jan 37° 20°
- Feb 40° 21°
- Mar 49° 28°
- Apr 61° 37°
- May 71° 47°
- Jun 79° 56°
- Jul 84° 60°
- Aug 82° 59°
- Sep 75° 52°
- Oct 64° 41°
- Nov 52° 32°
- Dec 42° 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 Dehart Dam each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 20°F. The most precipitation falls in September (5.63 in), the least in February (2.83 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 37°F | 20°F | 28.4°F | 3.59 | 8.4 | 9 | <1 | 28 | 9 h 30 min |
| February | 40°F | 21°F | 30.2°F | 2.83 | 8.3 | 8 | <1 | 25 | 10 h 40 min |
| March | 49°F | 28°F | 38.1°F | 3.88 | 5.1 | 9 | <1 | 22 | 11 h 50 min |
| April | 61°F | 37°F | 49.2°F | 4.46 | 0.6 | 11 | <1 | 9 | 13 h 10 min |
| May | 71°F | 47°F | 59.1°F | 4.42 | 0.0 | 13 | 1 | 1 | 14 h 20 min |
| June | 79°F | 56°F | 67.8°F | 4.87 | 0.0 | 11 | 3 | <1 | 15 h |
| July | 84°F | 60°F | 71.9°F | 5.05 | 0.0 | 10 | 6 | <1 | 14 h 50 min |
| August | 82°F | 59°F | 70.6°F | 4.27 | 0.0 | 11 | 4 | <1 | 13 h 50 min |
| September | 75°F | 52°F | 63.9°F | 5.63 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 64°F | 41°F | 52.4°F | 4.54 | 0.0 | 10 | <1 | 4 | 11 h 10 min |
| November | 52°F | 32°F | 42.3°F | 3.30 | 0.8 | 8 | <1 | 15 | 10 h |
| December | 42°F | 25°F | 33.4°F | 4.01 | 4.4 | 9 | <1 | 25 | 9 h 20 min |
| Year (annual) | 61°F | 40°F | 50.6°F | 50.85 | 27.6 | 117 | 14 | 128 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −7°C | −2.0°C | 91 mm | 21 cm |
| February | 4°C | −6°C | −1.0°C | 72 mm | 21 cm |
| March | 9°C | −2°C | 3.4°C | 99 mm | 13 cm |
| April | 16°C | 3°C | 9.6°C | 113 mm | 2 cm |
| May | 22°C | 8°C | 15.1°C | 112 mm | 0 cm |
| June | 26°C | 13°C | 19.9°C | 124 mm | 0 cm |
| July | 29°C | 16°C | 22.2°C | 128 mm | 0 cm |
| August | 28°C | 15°C | 21.4°C | 108 mm | 0 cm |
| September | 24°C | 11°C | 17.7°C | 143 mm | 0 cm |
| October | 18°C | 5°C | 11.3°C | 115 mm | 0 cm |
| November | 11°C | 0°C | 5.7°C | 84 mm | 2 cm |
| December | 5°C | −4°C | 0.8°C | 102 mm | 11 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00362071; 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 Dehart Dam?
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 USC00362071.
When is the last frost at Dehart Dam?
In Dehart Dam, the last spring frost (32°F) comes after May 1 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 16 in half of years and before October 3 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 11 year in 10 after May 20; 9 in 10 after April 15
- First autumn frost, half of years before
- October 161 year in 10 before October 3; 9 in 10 before November 1
NOAA puts the median frost-free season at 168 days, and the season without a hard freeze (28°F) at 194 days.
A hard freeze (28°F) comes after April 18 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dehart Dam in zone 6b in ZIP code 17032, 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 2°F (19 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00362071; 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 Dehart Dam?
In a normal year in Dehart Dam, 14 days a year reach 90°F, 128 nights fall to 32°F or colder and 117 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
- 128a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 117a normal year
- Days with 1 inch of snow or more
- 9a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00362071.
How sunny is it at Dehart Dam?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Dehart Dam, 3.9 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.8 |
| February | 66% | 2.7 |
| March | 66% | 3.6 |
| April | 69% | 4.8 |
| May | 69% | 5.3 |
| June | 75% | 6.0 |
| July | 79% | 6.0 |
| August | 76% | 5.2 |
| September | 74% | 4.2 |
| October | 68% | 2.9 |
| November | 69% | 2.1 |
| December | 60% | 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 Dehart Dam record?
A normal year at Dehart Dam brings 5,861 heating degree days, 9% more than the median U.S. place (5,373), and 642 cooling degree days, 29% 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 2,845 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,133 | 0 |
| February | 974 | 0 |
| March | 835 | 0 |
| April | 479 | 5 |
| May | 216 | 33 |
| June | 44 | 126 |
| July | 6 | 220 |
| August | 12 | 183 |
| September | 102 | 68 |
| October | 397 | 6 |
| November | 681 | 0 |
| December | 981 | 0 |
| Year (annual) | 5,861 | 642 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00362071. 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 Dehart Dam's climate compare?
Dehart Dam is warmer than 55 of the 108 places with their own NOAA record in Pennsylvania, and wetter than 98. Across the 7,247 U.S. stations with normals, its annual mean of 50.6°F is warmer than 43%.
In the Köppen classification computed from these normals, Dehart Dam 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 Dehart Dam share this climate record?
20 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.
- Linglestown, PA6,747 people · 8 mi S
- Skyline View, PA4,941 people · 9 mi S
- Millersburg, PA2,546 people · 12 mi NW
- Lykens, PA1,874 people · 8 mi N
- Tower City, PA1,436 people · 14 mi NE
- Elizabethville, PA1,352 people · 7 mi NW
- Williamstown, PA1,301 people · 11 mi NE
- Liverpool, PA983 people · 15 mi NW
- Halifax, PA813 people · 10 mi W
- Lenkerville, PA806 people · 12 mi NW
- Wiconsico, PA750 people · 9 mi NE
- Gratz, PA740 people · 10 mi N
- Muir, PA525 people · 15 mi NE
- Berrysburg, PA323 people · 10 mi N
- Reinerton, PA299 people · 14 mi NE
- Pillow, PA291 people · 13 mi N
- Orwin, PA199 people · 14 mi NE
- New Buffalo, PA126 people · 12 mi W
- Klingerstown, PA85 people · 14 mi N
- Fort Indiantown Gap, PA0 people · 9 mi E
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 Dehart Dam's climate
What is the coldest month at Dehart Dam?
January, with a normal high of 37°F and a normal low of 20°F. The warmest is July (84°F by day, 60°F at night).
Does it snow at Dehart Dam?
Yes: 28 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (8.4 inches).
What is the rainiest month at Dehart Dam?
September, with 5.63 in of precipitation in a normal year; the driest is February with 2.83 in.
What plant hardiness zone is Dehart Dam in?
The USDA's 2023 map puts Dehart Dam in zone 6b in ZIP code 17032, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 2°F (19 years, 1991-2020): zone 7a.
How late can frost come at Dehart Dam?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Lebanon, PA17 miles from this station, 52.3°F a year
- Harrisburg, PA17 miles from this station, 55.2°F a year
- Middletown, PA19 miles from this station, 54.3°F a year
- Selinsgrove, PA25 miles from this station, 51.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made