NOAA NCEI Climate Normals 1991–2020
Pennsylvania Weather by Month
Temperature, rain and the hurricane season at 128 Pennsylvania stations, month by month.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
The median station records 44.3 inches of precipitation a year; Laurel Summit, PA records the most, 56.5 inches, and Tioga Hammond Dam, PA the least, 36.4 (1.6 times as much). July is the hottest month at the median station (average high 84°F); the hottest July is at Phila Franklin Inst, PA, 89°F. January is the coldest (average low 19°F); the coldest January nights are at Oswayo 1 ENE, PA, 11°F. Highs reach 90°F on 11 days a year at the median station and on 40 at Phila Franklin Inst, PA, the most. Snowfall is heaviest at Laurel Summit, PA, 142.2 inches a year.
This page compares the 1991–2020 NOAA climate normals of 128 Pennsylvania weather stations, each the nearest station with full normals to at least one of the 794 Pennsylvania cities on this site that have one within 25 miles.
At the median station, July is the wettest month (4.5 inches) and February the driest (2.6). Station by station, the wettest month is July at 40, June at 37 and September at 35 of the 128, and the driest February at 125, January at 1 and October at 1. The gap between the wettest and driest station is widest in June: 2.7 inches.
Month by month across Pennsylvania
High, low and precipitation are the median of the 128 stations; the station columns name the station with the highest average high, the lowest average low, and the most and least precipitation that month, each linked to the city page it serves. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Hurricane season in Pennsylvania
June to November, the hurricane season months, bring 54% of the year's precipitation at the median station, from 49% at Chalk Hill 2 ENE, PA to 58% at Cowanesque Dam, PA. Since 1851, 67 tropical systems have passed within 75 miles of a Pennsylvania city on this site, 9 of them at hurricane strength at their closest point to one; September has brought the most (27), then October (15). 1 came outside June to November.
| Month | Tropical systems | At hurricane strength | Median precip. in |
|---|---|---|---|
| Jan | 0 | 0 | 3.2 |
| Feb | 0 | 0 | 2.6 |
| Mar | 0 | 0 | 3.5 |
| Apr | 0 | 0 | 3.7 |
| May | 1 | 0 | 4.0 |
| Jun | 6 | 0 | 4.4 |
| Jul | 4 | 0 | 4.5 |
| Aug | 13 | 2 | 4.0 |
| Sep | 27 | 2 | 4.3 |
| Oct | 15 | 5 | 3.8 |
| Nov | 1 | 0 | 3.2 |
| Dec | 0 | 0 | 3.5 |
Tropical systems from NOAA NHC HURDAT2 that passed within 75 miles of a Pennsylvania city on this site, each counted once, in the month of its first such pass; hurricane strength is the track's wind at its closest point to a city.
Coastal water temperature by month
Across 4 NOAA tide stations, the water is warmest in July (median 80°F, up to 82°F at Marcus Hook, PA) and coolest in February (median 38°F, down to 38°F at Newbold, PA). The median station averages 80°F or warmer in July.
| Station | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newbold, PA | 37 | 38 | 45 | 54 | 64 | 73 | 80 | 78 | 72 | 61 | 49 | 39 |
| Bridesburg, PA | 38 | 38 | 46 | 54 | 63 | 73 | 80 | 79 | 73 | 64 | 53 | 42 |
| Philadelphia, PA | 38 | 38 | 45 | 54 | 63 | 73 | 80 | 79 | 74 | 65 | 54 | 43 |
| Marcus Hook, PA | 39 | 39 | 46 | 55 | 64 | 74 | 82 | 81 | 75 | 66 | 55 | 43 |
°F, average of hourly readings 2021–2025; a month counts when at least three years have half their hours on record. Source: NOAA Tides & Currents; the newest readings are preliminary.
Pennsylvania cities and their stations
| City | Station | Miles | Hottest month high °F | Coldest month low °F | Year precip. in |
|---|---|---|---|---|---|
| Philadelphia | Phila Franklin Inst, PA | 4 | 89 | 28 | 50.9 |
| Drexel Hill | Philadelphia International Airport, PA | 7 | 88 | 26 | 44.2 |
| Lansdowne | Phila Franklin Inst, PA | 5 | 89 | 28 | 50.9 |
| Springfield | Philadelphia International Airport, PA | 7 | 88 | 26 | 44.2 |
| Palmyra | Lebanon 2 W, PA | 7 | 84 | 22 | 46.5 |
| Secane | Philadelphia International Airport, PA | 5 | 88 | 26 | 44.2 |
| Darby | Philadelphia International Airport, PA | 4 | 88 | 26 | 44.2 |
| Bristol | Neshaminy Falls, PA | 6 | 86 | 22 | 50.8 |
| Elkins Park | Philadelphia NE Airport, PA | 6 | 88 | 27 | 45.0 |
| Dillsburg | Carlisle Wtp, PA | 13 | 86 | 21 | 48.2 |
| West Mifflin | Pittsburgh Allegheny Co Airport, PA | 2 | 83 | 22 | 41.3 |
| Apollo | Salina 3 W, PA | 4 | 83 | 20 | 45.8 |
| Sharon Hill | Philadelphia International Airport, PA | 3 | 88 | 26 | 44.2 |
| Cheltenham | Philadelphia NE Airport, PA | 5 | 88 | 27 | 45.0 |
| Folcroft | Philadelphia International Airport, PA | 3 | 88 | 26 | 44.2 |
| Morton | Philadelphia International Airport, PA | 6 | 88 | 26 | 44.2 |
| Taylor | Wilkes-Barre International Airport, PA | 4 | 85 | 20 | 39.0 |
| Gouldsboro | Mt Pocono Mountains Airport, PA | 10 | 78 | 15 | 50.3 |
| Holmes | Philadelphia International Airport, PA | 5 | 88 | 26 | 44.2 |
| Hopwood | Uniontown 1 NE, PA | 3 | 84 | 21 | 44.5 |
| Riegelsville | Springtown 1 NNE, PA | 3 | 83 | 19 | 53.3 |
How stations are matched to cities and what normals are: methodology · other states by month