Selinsgrove, Pennsylvania climate: Normal weather by month, frost dates and records
Selinsgrove's normal year runs from 20°F January nights to 84°F July afternoons, with 40.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.6°C, January lows of −7°C, July highs of 29°C, 1,039 mm of precipitation a year.
- NOAA stationSelinsgrove Penn Valley Airport
- Station IDUSW00014770
- Location40.82°N 76.86°W
- Elevation444 ft (135 m)
- From the center1 miles
- Population5,501
On October 23, the normal high in Selinsgrove is 61°F and the normal low 38°F, and the chance of measurable rain or snow is 38%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Selinsgrove.
- Jan 36° 20°
- Feb 39° 21°
- Mar 49° 29°
- Apr 62° 38°
- May 72° 49°
- Jun 81° 59°
- Jul 84° 62°
- Aug 82° 60°
- Sep 76° 52°
- Oct 64° 41°
- Nov 52° 32°
- Dec 41° 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 in Selinsgrove 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 (4.51 in), the least in February (2.06 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 20°F | 28.0°F | 2.68 | 10 | <1 | 27 | 9 h 30 min |
| February | 39°F | 21°F | 30.2°F | 2.06 | 10 | <1 | 24 | 10 h 40 min |
| March | 49°F | 29°F | 39.0°F | 3.06 | 11 | <1 | 21 | 11 h 50 min |
| April | 62°F | 38°F | 50.1°F | 3.56 | 13 | <1 | 7 | 13 h 20 min |
| May | 72°F | 49°F | 60.5°F | 3.55 | 14 | 1 | 1 | 14 h 30 min |
| June | 81°F | 59°F | 69.5°F | 3.94 | 14 | 3 | <1 | 15 h |
| July | 84°F | 62°F | 73.3°F | 4.18 | 15 | 7 | <1 | 14 h 50 min |
| August | 82°F | 60°F | 71.1°F | 3.73 | 15 | 3 | <1 | 13 h 50 min |
| September | 76°F | 52°F | 63.9°F | 4.51 | 14 | 2 | <1 | 12 h 30 min |
| October | 64°F | 41°F | 52.5°F | 3.78 | 13 | <1 | 5 | 11 h 10 min |
| November | 52°F | 32°F | 41.8°F | 3.05 | 10 | <1 | 18 | 10 h |
| December | 41°F | 25°F | 32.9°F | 2.81 | 11 | <1 | 25 | 9 h 20 min |
| Year (annual) | 62°F | 41°F | 51.1°F | 40.91 | 149 | 15 | 128 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −7°C | −2.2°C | 68 mm |
| February | 4°C | −6°C | −1.0°C | 52 mm |
| March | 9°C | −2°C | 3.9°C | 78 mm |
| April | 17°C | 3°C | 10.1°C | 90 mm |
| May | 22°C | 9°C | 15.8°C | 90 mm |
| June | 27°C | 15°C | 20.8°C | 100 mm |
| July | 29°C | 17°C | 22.9°C | 106 mm |
| August | 28°C | 16°C | 21.7°C | 95 mm |
| September | 24°C | 11°C | 17.7°C | 115 mm |
| October | 18°C | 5°C | 11.4°C | 96 mm |
| November | 11°C | 0°C | 5.4°C | 77 mm |
| December | 5°C | −4°C | 0.5°C | 71 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Selinsgrove's own co-op station Selinsgrove (2 mi S) does: 29 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00014770; 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 Selinsgrove?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, May has the fewest days with rain (14).
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 USW00014770.
When is the last frost in Selinsgrove?
In Selinsgrove, the last spring frost (32°F) comes after April 27 in half of years and after May 12 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
- April 271 year in 10 after May 12; 9 in 10 after April 13
- 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 172 days, and the season without a hard freeze (28°F) at 197 days.
A hard freeze (28°F) comes after April 14 in half of springs and before October 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Selinsgrove in zone 6b in ZIP code 17870, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Selinsgrove's NOAA station is in zone 6b: the coldest night of a typical year reaches −3°F (23 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 USW00014770; 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 in Selinsgrove?
In a normal year in Selinsgrove, 15 days a year reach 90°F, 128 nights fall to 32°F or colder and 149 days bring measurable precipitation.
- Days at 90°F or more
- 15a 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
- 149a normal year
The highest temperature in this station's record (since 1947) is 104°F, on July 8, 2010; the lowest is −22°F, on January 29, 1948.
The wettest calendar year on that record is 2011, with 68.02 in; the snowiest season is 1951–52, with 43.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00014770; records: ACIS (NOAA Regional Climate Centers), station USW00014770. Records use complete months only; a month missing more than three days is left out.
How sunny is Selinsgrove?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Selinsgrove, 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 much heating and cooling does Selinsgrove need?
A normal year in Selinsgrove brings 5,790 heating degree days, 8% more than the median U.S. place (5,373), and 743 cooling degree days, 18% 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 3,006 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,147 | 0 |
| February | 974 | 0 |
| March | 808 | 0 |
| April | 452 | 5 |
| May | 184 | 43 |
| June | 26 | 163 |
| July | 2 | 260 |
| August | 9 | 198 |
| September | 100 | 67 |
| October | 395 | 8 |
| November | 696 | 0 |
| December | 997 | 0 |
| Year (annual) | 5,790 | 743 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00014770. 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 Selinsgrove been warmer than normal lately?
2024 averaged 53.3°F, 2.2°F above the 1991-2020 normal of 51.1°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 52.6°F | +1.5°F | 41.24 |
| 2022 | 51.4°F | +0.3°F | 39.77 |
| 2023 | 53.2°F | +2.1°F | 41.84 |
| 2024 | 53.3°F | +2.2°F | 38.53 |
Source: observed years: ACIS, station USW00014770. A year counts only with all twelve months complete.
How does Selinsgrove's climate compare?
Selinsgrove is warmer than 59 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 11. Across the 7,247 U.S. stations with normals, its annual mean of 51.1°F is warmer than 45%.
In the Köppen classification computed from these normals, Selinsgrove 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 Selinsgrove 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.
- Middleburg, PA1,314 people · 10 mi W
- Hummels Wharf, PA988 people · 1 mi NE
- Port Trevorton, PA720 people · 9 mi S
- Freeburg, PA554 people · 6 mi SW
- Kreamer, PA490 people · 6 mi W
- Mount Pleasant Mills, PA414 people · 11 mi SW
- Dalmatia, PA393 people · 12 mi S
- Kratzerville, PA348 people · 3 mi NW
- Herndon, PA344 people · 8 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Selinsgrove's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Selinsgrove. This page uses Selinsgrove Penn Valley Airport; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Selinsgrove (2 mi S) USC00367931 | 1 mi S | 420 ft | 50.7°F | 19°F | 85°F | 43.1 | 29 | April 25 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Selinsgrove's climate
What is the coldest month in Selinsgrove?
January, with a normal high of 36°F and a normal low of 20°F. The warmest is July (84°F by day, 62°F at night).
Does it snow in Selinsgrove?
Yes. NOAA publishes no 1991-2020 snowfall normal for Selinsgrove's NOAA station; Selinsgrove's own co-op station Selinsgrove (2 mi S) records 29 inches of snow in a normal year.
What is the rainiest month in Selinsgrove?
September, with 4.51 in of precipitation in a normal year; the driest is February with 2.06 in.
What plant hardiness zone is Selinsgrove in?
The USDA's 2023 map puts Selinsgrove in zone 6b in ZIP code 17870, the nearest ZIP area. By the same method at Selinsgrove's NOAA station, the coldest night of a typical year reaches −3°F (23 years, 1991-2020): zone 6b.
How late can frost come in Selinsgrove?
In half of years the last 32°F night comes after April 27; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Sunbury, PA4 miles from this station, 50.3°F a year
- Lewisburg, PA9 miles from this station, 50.4°F a year
- Laurelton, PA19 miles from this station, 51.8°F a year
- Bear Gap, PA19 miles from this station, 50.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made