Climateby Month

Philadelphia vs Pittsburgh weather

Philadelphia, PA and Pittsburgh, PA · 257 mi apart

July highs: 88°F in Philadelphia, 83°F in Pittsburgh (Philadelphia is 5°F warmer). January highs: 41°F and 36°F (Philadelphia is 5°F warmer). Philadelphia has about 121 wet days a year, Pittsburgh about 154. Muggy days: about 52 a year in Philadelphia, about 30 in Pittsburgh. Snow: 23.1 in a year in Philadelphia, 44.1 in in Pittsburgh.

Philadelphia, PA

20°40°60°80°100° January: normal high 41°F (5°C), low 26°F (-3°C) 41° 26° February: normal high 44°F (7°C), low 28°F (-2°C) March: normal high 53°F (12°C), low 34°F (1°C) April: normal high 65°F (18°C), low 44°F (7°C) May: normal high 74°F (23°C), low 54°F (12°C) June: normal high 83°F (28°C), low 64°F (18°C) July: normal high 88°F (31°C), low 70°F (21°C) 88° 70° August: normal high 86°F (30°C), low 68°F (20°C) September: normal high 79°F (26°C), low 61°F (16°C) October: normal high 67°F (19°C), low 49°F (9°C) November: normal high 56°F (13°C), low 39°F (4°C) December: normal high 46°F (8°C), low 31°F (-1°C) JFMAMJJASOND

Best months: May

Pittsburgh, PA

20°40°60°80°100° January: normal high 36°F (2°C), low 21°F (-6°C) 36° 21° February: normal high 40°F (4°C), low 23°F (-5°C) March: normal high 49°F (9°C), low 30°F (-1°C) April: normal high 62°F (17°C), low 41°F (5°C) May: normal high 72°F (22°C), low 51°F (11°C) June: normal high 79°F (26°C), low 59°F (15°C) July: normal high 83°F (28°C), low 63°F (17°C) 83° 63° August: normal high 82°F (28°C), low 62°F (17°C) September: normal high 75°F (24°C), low 55°F (13°C) October: normal high 63°F (17°C), low 44°F (7°C) November: normal high 51°F (11°C), low 34°F (1°C) December: normal high 41°F (5°C), low 27°F (-3°C) JFMAMJJASOND

Best months: May, September

Which city for what

  • Milder winters: Philadelphia (January high 41°F vs January high 36°F)
  • Cooler summers: Pittsburgh (July high 83°F vs July high 88°F)
  • Fewer wet days: Philadelphia (121 a year vs 154 a year)
  • Less humid: Pittsburgh (30 muggy days vs 52 muggy days)
  • Less snow: Philadelphia (23.1 in vs 44.1 in)
  • Longer growing season: Philadelphia (232 frost-free days vs 186 frost-free days)
  • More comfortable days: Pittsburgh (88 a year vs 78 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high PhiladelphiaAvg high PittsburghWet days PhiladelphiaWet days Pittsburgh
Winter (Dec-Feb)44°F39°F3245
Spring (Mar-May)64°F61°F3341
Summer (Jun-Aug)86°F81°F2934
Fall (Sep-Nov)67°F63°F2733

Side by side over a year

PhiladelphiaPittsburgh
Hot days (90°F+)3010
Freezing nights78114
Muggy days5230
Comfortable days7888
Precipitation44.1 in39.6 in
Snowfall23.1 in44.1 in
Frost dateslast Mar 30, first Nov 17last Apr 24, first Oct 27
Daylight in June / December15.0 h / 9.4 h15.0 h / 9.3 h
Best monthsMayMay, September

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.

Month by month

MonthHigh PhiladelphiaHigh PittsburghWet days PhiladelphiaWet days Pittsburgh
January41°F36°F1117
February44°F40°F1014
March53°F49°F1114
April65°F62°F1114
May74°F72°F1114
June83°F79°F1012
July88°F83°F1011
August86°F82°F911
September79°F75°F910
October67°F63°F911
November56°F51°F912
December46°F41°F1115

Both charts use the same temperature scale.

Where the numbers come from

  • Philadelphia, PA: temperature from Philadelphia Intl Airport (USW00013739), 6.8 mi SSW of the city center; precipitation from Philadelphia Intl Airport (USW00013739). NOAA 1991-2020 normals and daily records.
  • Pittsburgh, PA: temperature from Pittsburgh Intl Airport (USW00094823), 12 mi WNW of the city center; precipitation from Pittsburgh Intl Airport (USW00094823). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.