Do you need to know, when is the best time to go to Pennsylvania? Then you should take a look here, what weather you can expect there during the year.
Pennsylvania is part of USA - United States of America. The climate of USA is very varied, as United States of America is a large country. The climate is mostly temperate, but tropical in Hawaii and Florida, and arctic in Alaska. This is not all. The climate is semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest. You can expect low winter temperatures in the northwest, but they are sometimes moderated in January and February by warm winds. Winters in the south are warmer. Don? forget, that temperatures are usually significantly lower in mountains.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Abington Township, Adams County, Alleghenies and Susquehanna Valley, Allegheny County, Allentown, Altoona, Ardmore, Ashland, Bala Cynwyd, Bangor, Beaver Falls, Bedford, Bellefonte, Bensalem, Benton, Berwick, Berwyn, Bethel Park, Bethlehem, Big Beaver, Bloomsburg, Blue Bell, Bradford, Breezewood, Bridgeport, Bristol, Bryn Mawr, Bucks County, Bushkill Falls, Butler, Camp Hill, Carbondale, Carlisle, Castle Shannon, Centralia, Chadds Ford, Chalfont, Chambersburg, Chester, Chester County, Clarion, Clarks Summit, Clearfield, Clifton Heights, Coal Region, Coatesville, Collegeville, Connellsville, Conshohocken, Coraopolis, Coudersport, Cranberry, Danville, Delaware County, Delaware Valley, Donegal, Downingtown, Doylestown, Drexel Hill, DuBois, Dunmore, Eagleville, East Norriton, East Stroudsburg, Easton, Elizabethtown, Elkins Park, Emmaus, Erie, Erie Region, Exton, Factoryville, Feasterville, Fogelsville, Fort Washington, Franklin, Franklin Park, Galeton, Gettysburg, Glen Mills, Glenolden, Grantville, Green Tree, Greensburg, Grove City, Hanover, Harrisburg, Harrisburg area, Haverford, Haverford Township, Havertown, Hawley, Hazleton, Hellertown, Hershey, Holland, Honey Brook, Hummelstown, Huntingdon Valley, Indiana, Intercourse, Irwin, Jenkintown, Jim Thorpe, Johnstown, Kane, Kennett Square, King of Prussia, Kulpsville, Kutztown, Lancaster, Lancaster County, Landisville, Langhorne, Lansdale, Lansdowne, Latrobe, Laurel Highlands, Lebanon, Lehigh Valley, Lehighton, Lewisburg, Lewistown, Lititz, Lock Haven, Lower Gwynedd Township, Malvern, Mansfield, Marple, Mars, Meadville, Mechanicsburg, Media, Mercersburg, Middletown, Millbourne, Millersburg, Monroeville, Montgomery County, Mount Carmel, Mount Gretna, Mt. Lebanon, Narberth, Nazareth, New Hope, New Stanton, Newtown, Norristown, North Pittsburgh Region, Northern Tier, Numidia, Ohiopyle, Oxford, Palm, Paoli, Peddler's Village, Pennsburg, Pennsylvania Dutch Country, Pennsylvania Wilds, Philadelphia, Philadelphia Region, Pittsburgh, Pittsburgh Region, Poconos and Endless Mountains, Port Allegany, Pottsville, Punxsutawney, Quakertown, Reading, Ridgway, Ridley Park, Robinson Township, Rose Valley, Ross Township, Scranton, Selinsgrove, Sewickley, Shamokin, Shamokin Dam, Sharon Hill, Shawnee on Delaware, Shickshinny, Shrewsbury, Skippack Village, Slatington, Solebury, Somerset, South Pittsburgh Region, South Whitehall, St. Marys, State College, Sterling, Stroudsburg, Swarthmore, Tannersville, Thorndale, Tinicum Township, Titusville, Towamencin, Tullytown, Uniontown, Upper Darby, Upper St. Clair Township, Villanova, Warminster, Warren, Washington, Washington Crossing Historical Park, Wayne, Waynesburg, Wellsboro, West Chester, West Grove, West Mifflin, Whitehall, Wilkes Barre, Williamsport, Willow Grove, Yardley, York, Zelienople.
Let's look now what weather you can expect in the area around Pittsburgh and in many other cities. The warmest month here is July, the average maximum temperature is 28.6 ℃ (83.48 ℉). The average minimum temperature in this month is 18 ℃ (64.4 ℉). The coldest month here is January, the average maximum temperature is 2.3 ℃ (36.14 ℉). The average minimum temperature in this month is -5.4 ℃ (22.28 ℉). 
When travelling around Pennsylvania, always consider the altitude of the the place as well. We should remind you, that the highest point in USA - United States of America is Denali (Mount McKinley) (6190 m) and the lowest point is Death Valley (-86 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Pennsylvania in January is this: The average highest temperature in Pennsylvania in January is 2.3 ℃ (36.14 ℉). The average lowest temperature is -5.4 ℃ (22.28 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 3.4 ℃ (38.12 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 3.3 ℃ (37.94 ℉). The average rainfall is 68.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:19 (hours and minutes), in the middle of the month 9:36 and at the end of the month 10:03.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Pennsylvania in February is this: The average highest temperature in Pennsylvania in February is 4.3 ℃ (39.74 ℉). The average lowest temperature is -4.2 ℃ (24.44 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 3.3 ℃ (37.94 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 6.85 ℃ (44.33 ℉). The average rainfall is 68.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:03 (hours and minutes), in the middle of the month 10:38 and at the end of the month 11:17.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in March is this: The average highest temperature in Pennsylvania in March is 9.4 ℃ (48.92 ℉). The average lowest temperature is -0.4 ℃ (31.28 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 6.85 ℃ (44.33 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). The average rainfall is 77.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:17 (hours and minutes), in the middle of the month 11:57 and at the end of the month 12:37.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Pennsylvania in April is this: The average highest temperature in Pennsylvania in April is 16.9 ℃ (62.42 ℉). The average lowest temperature is 5.6 ℃ (42.08 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 13.15 ℃ (55.67 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 19.45 ℃ (67.01 ℉). The average rainfall is 78.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:37 (hours and minutes), in the middle of the month 13:17 and at the end of the month 13:53.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in May is this: The average highest temperature in Pennsylvania in May is 22 ℃ (71.6 ℉). The average lowest temperature is 10.8 ℃ (51.44 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 19.45 ℃ (67.01 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 24.15 ℃ (75.47 ℉). The average rainfall is 103.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:53 (hours and minutes), in the middle of the month 14:25 and at the end of the month 14:49.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Pennsylvania in June is this: The average highest temperature in Pennsylvania in June is 26.3 ℃ (79.34 ℉). The average lowest temperature is 15.5 ℃ (59.9 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 24.15 ℃ (75.47 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 27.45 ℃ (81.41 ℉). The average rainfall is 103.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:49 (hours and minutes), in the middle of the month 15:02 and at the end of the month 15:02.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Pennsylvania in July is this: The average highest temperature in Pennsylvania in July is 28.6 ℃ (83.48 ℉). The average lowest temperature is 18 ℃ (64.4 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 27.45 ℃ (81.41 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 28.15 ℃ (82.67 ℉). The average rainfall is 96.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 15:02 (hours and minutes), in the middle of the month 14:48 and at the end of the month 14:24.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in August is this: The average highest temperature in Pennsylvania in August is 27.7 ℃ (81.86 ℉). The average lowest temperature is 16.7 ℃ (62.06 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 28.15 ℃ (82.67 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 25.35 ℃ (77.63 ℉). The average rainfall is 87.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:24 (hours and minutes), in the middle of the month 13:52 and at the end of the month 13:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in September is this: The average highest temperature in Pennsylvania in September is 23 ℃ (73.4 ℉). The average lowest temperature is 13.5 ℃ (56.3 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 25.35 ℃ (77.63 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 20.3 ℃ (68.54 ℉). The average rainfall is 84.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:15 (hours and minutes), in the middle of the month 12:37 and at the end of the month 11:57.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in October is this: The average highest temperature in Pennsylvania in October is 17.6 ℃ (63.68 ℉). The average lowest temperature is 6.8 ℃ (44.24 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 20.3 ℃ (68.54 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 14.05 ℃ (57.29 ℉). The average rainfall is 62.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:57 (hours and minutes), in the middle of the month 11:17 and at the end of the month 10:39.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in November is this: The average highest temperature in Pennsylvania in November is 10.5 ℃ (50.9 ℉). The average lowest temperature is 2.3 ℃ (36.14 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 14.05 ℃ (57.29 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 7.5 ℃ (45.5 ℉). The average rainfall is 86.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:39 (hours and minutes), in the middle of the month 10:04 and at the end of the month 9:36.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Pennsylvania in December is this: The average highest temperature in Pennsylvania in December is 4.5 ℃ (40.1 ℉). The average lowest temperature is -2.9 ℃ (26.78 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 7.5 ℃ (45.5 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 3.4 ℃ (38.12 ℉). The average rainfall is 74.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 9:36 (hours and minutes), in the middle of the month 9:19 and at the end of the month 9:16.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Allentown | temperature: - | highest temperature: 4.8 ℃ (40.64 ℉) | lowest temperature: -4.3 ℃ (24.26 ℉) | rainfall: 90.4mm | rainy days: 11 |
| Erie | temperature: - | highest temperature: 3.7 ℃ (38.66 ℉) | lowest temperature: -2.7 ℃ (27.14 ℉) | rainfall: 95.5mm | rainy days: 19.4 |
| Harrisburg | temperature: - | highest temperature: 4.5 ℃ (40.1 ℉) | lowest temperature: -2.9 ℃ (26.78 ℉) | rainfall: 83.4mm | rainy days: - |
| Philadelphia | temperature: - | highest temperature: 7.4 ℃ (45.32 ℉) | lowest temperature: -0.9 ℃ (30.38 ℉) | rainfall: 91.3mm | rainy days: 10.7 |
| Pittsburgh | temperature: - | highest temperature: 4.5 ℃ (40.1 ℉) | lowest temperature: -2.9 ℃ (26.78 ℉) | rainfall: 74.3mm | rainy days: - |
| Wilkes Barre | temperature: - | highest temperature: 3.3 ℃ (37.94 ℉) | lowest temperature: -4.4 ℃ (24.08 ℉) | rainfall: 68.1mm | rainy days: 11.6 |
| Reading | temperature: - | highest temperature: 5.6 ℃ (42.08 ℉) | lowest temperature: -3.1 ℃ (26.42 ℉) | rainfall: 83.1mm | rainy days: - |