The chance that a given day will be muggy in Philadelphia is rapidly increasing during May, rising from 1% to 17% over the course of the month. For reference, the year's highest daily chance of a wet day is 37% on July 28, and its lowest chance is 22% on January 28. Pennsylvania generally has a humid continental climate characterized by wide fluctuations in seasonal temperatures, with prevailing winds from the west. Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. The amount of rain in May is high with an average of 111mm (4.4in). This month generally has very pleasant temperatures. Daily low temperatures increase by 10°F, from 50°F to 60°F, rarely falling below 42°F or exceeding 68°F. Average temperatures for May at cities, towns, parks and lakes throughout Pennsylvania are listed below in degrees Fahrenheit and Celsius. This report illustrates the typical weather in Philadelphia, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The highest monthly average temperature in Lebanon for July is 75 degrees; The lowest monthly average temperature in Lebanon for January is 30 degrees; The most monthly precipitation in Lebanon occurs in September with 10.8 inches; The air quality index in Lebanon is 16% better than the national average Average Weather during May in Lancaster (Pennsylvania), United States of America. 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. To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day. The average annual temperature in North East is 8.8 °C | … Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. Average Weather during May in Philadelphia (Pennsylvania), United States of America. In July, the warmest month, the average day time temperature rises to 85.5°F. The hourly average wind direction in Philadelphia throughout May is predominantly from the west, with a peak proportion of 33% on May 1. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. See Historical Weather Data for a Location and Date. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The black line is the percentage chance that a given day is within the growing season. Shortwave radiation includes visible light and ultraviolet radiation. You can jump to a separate table for Eastern and Western Pennsylvania.. Based on weather reports collected during 1985–2015. In may, maximum temperature is 76°F and minimum temperature is 67°F (for an average temperature of 72°F). In Scranton, PA during May the average high temperature is 72.0°F. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. Average temperatures for May at cities, towns, parks and lakes throughout Pennsylvania are listed below in degrees Fahrenheit and Celsius. 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. The climate pleasant around this city in the month of may. The shortest day of the month is May 1, with 13 hours, 56 minutes of daylight and the longest day is May 31, with 14 hours, 49 minutes of daylight. The topography within 2 miles of Philadelphia contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 37 feet. Annual Weather Averages Near Philadelphia. In January, the average temperature is -0.2 °C | 31.6 °F. A climate chart for your city, indicating the monthly high temperatures and rainfall. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. In July, the warmest month, the average day time temperature rises to 85.7°F. Annual Weather Averages Near Allentown. The stations contributing to this reconstruction are: Philadelphia International Airport (50%, 10 kilometers, southwest); Wings Field (18%, 19 kilometers, northwest); North Philadelphia Airport (20%, 19 kilometers, northeast); and South Jersey Regional Airport (12%, 28 kilometers, east). The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. The average growing degree days accumulated over the course of May, with 25th to 75th and 10th to 90th percentile bands. Climate. Over the course of May in Philadelphia, the length of the day is increasing. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. Based on weather reports collected during 1985–2015. Climate in Pennsylvania. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. For each station, the records are corrected for the elevation difference between that station and Philadelphia according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. Climate is the average of weather over time. StateCollege.com Address: 220 Regent Court, Suite B, State College, PA 16801 Email: [email protected] Phone: (814) 238-3500 Average Weather in May in Erie Pennsylvania, United States. Daily high temperatures increase by 8°F, from 70°F to 78°F, rarely falling below 58°F or exceeding 88°F. NOAA's 1981-2010 Climate Normals. The climate of Pennsylvania is diverse due to the multitude of geographic features found within the state. You can jump to a separate table for Eastern and Western Pennsylvania. The earliest sunset is 7:55 PM on May 1 and the latest sunset is 27 minutes later at 8:22 PM on May 31. Weather data is prone to errors, outages, and other defects. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. Russell, Pennsylvania - Travel and vacation weather averages, current conditions and forecasts. Scranton, PA daily average and extreme temperature range for May. July is the warmest month of the year. Select a destination to see more weather parameters. The average accumulated growing degree days in Philadelphia are increasing during May, increasing by 420°F, from 294°F to 714°F, over the course of the month. Average Weather in May in Philadelphia Pennsylvania, United States. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon. The tables give the normals for maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. The growing season in Philadelphia typically lasts for 7.2 months (222 days), from around April 1 to around November 9, rarely starting before March 15 or after April 17, and rarely ending before October 23 or after November 25. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . For the purposes of this report, the geographical coordinates of Philadelphia are 39.952 deg latitude, -75.164 deg longitude, and 39 ft elevation. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . The average sliding 31-day rainfall during May in Philadelphia is essentially constant, remaining about 3.4 inches throughout, and rarely exceeding 6.0 inches or falling below 1.6 inches. Tbilisi, Georgia (5,665 miles away) is the far-away foreign place with temperatures most similar to Philadelphia (view comparison). Philadelphia Weather by month // weather averages Within 10 miles also contains only modest variations in elevation (443 feet). Use this monthly calendar to view weather averages, such as average temperature 14 days ahead of today, as well as the historical weather patterns over the past year. January Record Date Location County ; Maximum Temperature: 85 °F : January 22, 1906 : Freeport : Armstrong : Minimum Temperature -42 °F : January 5, 1904 The tables give daily averages along with highest and lowest relative humidity levels. North East climate summary The North East lies on 246m above sea level Generally, it is cold and temperate in North East. For reference, on June 20, the longest day of the year, the Sun rises at 5:32 AM and sets 15 hours, 1 minute later, at 8:32 PM, while on December 21, the shortest day of the year, it rises at 7:19 AM and sets 9 hours, 20 minutes later, at 4:39 PM. The average humidity in May is listed below for places in Pennsylvania. Pennsylvania weather in May 2021. For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on September 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%. The tables give the normals for maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. The average minimum temperature (usually the minimum temperature is noted during the night) in Lancaster in May is 11.0°C (51.8°F). 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