Climate and Average Weather Year Round in Pennsylvania United States

We show the climate in Pennsylvania by comparing the average weather in 4 representative places: Philadelphia, Pittsburgh, Erie, and Scranton.

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Pennsylvania, United States
Pennsylvania, United States
Pennsylvania, United States
Pennsylvania, United States

Average High and Low Temperature in Pennsylvania

Average High and Low Temperature in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F702687406623833779322090169NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.
Philadelphia 41°F44°F53°F64°F74°F82°F86°F84°F77°F66°F55°F45°F
Pittsburgh 37°F41°F51°F63°F72°F80°F83°F81°F75°F63°F52°F42°F
Erie 34°F35°F43°F55°F66°F75°F79°F77°F71°F60°F49°F39°F
Scranton 34°F37°F47°F60°F70°F77°F82°F79°F72°F61°F49°F38°F
Philadelphia 27°F29°F36°F45°F55°F64°F69°F68°F60°F49°F40°F32°F
Pittsburgh 24°F26°F34°F44°F53°F62°F66°F64°F57°F47°F38°F29°F
Erie 23°F23°F30°F40°F51°F60°F65°F64°F58°F48°F38°F29°F
Scranton 21°F23°F30°F41°F50°F59°F63°F61°F54°F44°F35°F27°F


Average Hourly Temperature in PhiladelphiaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmhotfreezing


Average Hourly Temperature in PittsburghJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezingfreezing


Average Hourly Temperature in ErieJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezingfreezing


Average Hourly Temperature in ScrantonJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldcoldcoldcoolwarmvery coldcomfortablecomfortablefreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies in Pennsylvania

Chance of Clearer Skies in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%64466531662736NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Philadelphia 47%48%49%51%51%53%59%62%63%62%55%48%
Pittsburgh 32%35%42%46%48%54%61%64%64%57%46%36%
Erie 27%32%40%45%49%55%62%66%63%56%44%33%
Scranton 37%38%43%45%46%51%59%62%62%57%47%40%

Daily Chance of Precipitation in Pennsylvania

Daily Chance of Precipitation in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%372241371621NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Philadelphia 7.0d7.0d8.4d8.9d10.0d10.5d11.1d10.1d8.2d7.5d7.6d7.7d
Pittsburgh 6.8d6.8d9.3d10.0d11.5d12.0d11.5d9.9d8.7d8.1d8.0d7.7d
Erie 6.1d5.6d8.1d9.7d10.4d10.6d10.7d10.1d10.3d10.7d9.0d8.2d
Scranton 6.7d6.5d8.2d8.9d10.7d11.5d11.5d10.3d8.5d7.6d7.2d7.6d

Average Monthly Rainfall in Pennsylvania

Average Monthly Rainfall in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 in3.
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
Philadelphia 2.2″2.2″3.2″3.6″3.3″3.5″3.7″3.6″3.6″3.3″3.3″3.1″
Pittsburgh 1.6″1.6″2.3″2.7″3.2″3.4″3.1″2.8″2.7″2.3″2.5″2.2″
Erie 1.0″0.9″1.4″2.2″2.7″2.9″2.8″2.6″3.1″2.9″2.2″1.6″
Scranton 1.5″1.5″2.2″3.2″3.3″3.6″3.3″3.3″3.6″3.3″2.9″2.2″

Average Monthly Snowfall in Pennsylvania

Average Monthly Snowfall in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in6.
The average snowfall accumulated over the course of a sliding 31-day period centered on the day in question.
Philadelphia 6.0″5.9″2.1″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.6″3.2″
Pittsburgh 3.1″3.4″1.9″0.1″0.0″0.0″0.0″0.0″0.0″0.0″0.5″2.0″
Erie 3.3″3.9″3.1″0.6″0.0″0.0″0.0″0.0″0.0″0.0″0.6″2.5″
Scranton 7.4″7.2″4.2″0.8″0.0″0.0″0.0″0.0″0.0″0.1″1.6″5.4″

Hours of Daylight in Pennsylvania

Hours of Daylight in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr15.09.3NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The number of hours during which the Sun is at least partly above the horizon.
Philadelphia 9.7h10.7h12.0h13.3h14.4h15.0h14.7h13.7h12.4h11.1h10.0h9.4h
Pittsburgh 9.7h10.7h12.0h13.3h14.5h15.0h14.7h13.7h12.4h11.1h9.9h9.3h
Erie 9.5h10.6h12.0h13.4h14.6h15.2h14.9h13.8h12.4h11.0h9.8h9.2h
Scranton 9.6h10.6h12.0h13.4h14.5h15.1h14.8h13.8h12.4h11.1h9.9h9.2h

Chance of Muggy Conditions in Pennsylvania

Chance of Muggy Conditions in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%58403531NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Philadelphia 0.0d0.0d0.0d0.1d2.3d9.3d16.6d14.5d7.0d1.4d0.1d0.0d
Pittsburgh 0.0d0.0d0.0d0.0d1.1d6.6d11.7d9.7d3.8d0.3d0.0d0.0d
Erie 0.0d0.0d0.0d0.0d0.7d4.7d10.1d8.8d3.5d0.3d0.0d0.0d
Scranton 0.0d0.0d0.0d0.0d0.7d4.6d8.9d7.2d2.7d0.2d0.0d0.0d

Average Wind Speed in Pennsylvania

Average Wind Speed in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph9.
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec

Average Water Temperature in Pennsylvania

Average Water Temperature in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F7439NaN34NaNNowNowErieEriePhiladelphiaPhiladelphia
The daily average wide-area surface water temperature.
Water Temp.JanFebMarAprMayJunJulAugSepOctNovDec
Philadelphia 42°F39°F42°F48°F56°F66°F73°F74°F71°F63°F55°F47°F
Erie 36°F34°F34°F39°F49°F62°F71°F73°F68°F59°F50°F42°F

Tourism Score in Pennsylvania

Tourism Score in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.70.27.1NowNowErieEriePhiladelphiaPhiladelphiaScrantonScranton
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in Pennsylvania

Beach/Pool Score in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.25.1NowNowErieEriePhiladelphiaPhiladelphiaScrantonScranton
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in Pennsylvania

Growing Season in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowErieEriePhiladelphiaPhiladelphiaPittsburghPittsburghScrantonScranton
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days in Pennsylvania

Growing Degree Days in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FNowNowErieEriePhiladelphiaPhiladelphiaScrantonScranton
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy in Pennsylvania

Average Daily Incident Shortwave Solar Energy in PennsylvaniaJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh6.
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec

This report illustrates the typical weather for Philadelphia, Pittsburgh, Erie, and Scranton year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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