My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Elev 148 ft, 39.896 °N 75.351 °W

      Swarthmore, PA

      Knauer Observatory Station61°
      Updated: 12:09 AM EDT on September 8, 2026 (GMT -4)
      3 minutes ago
      70°
      63°
      61
      Feels Like 61
      Fair
      N
      4
      Higher temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Mon 09/07
        Low 59°f
         4% Precip. / 0 in
        Generally clear skies. Low 59F. Winds light and variable.
        Tomorrow
        Tue 09/08
        High 85°f
         5% Precip. / 0 in
        Intervals of clouds and sunshine. High around 85F. Winds WNW at 5 to 10 mph.
        Tomorrow night
        Tue 09/08
        Low 67°f
         7% Precip. / 0 in
        A few clouds from time to time. Low 67F. Winds light and variable.
        Hourly Forecast
        Now
        61°
        1AM
        60°
        2AM
        60°
        3AM
        59°
        4AM
        62°
        5AM
        62°
        6AM
        61°
        6:35AM
        Sunrise
        7AM
        61°
        8AM
        63°
        9AM
        68°
        10AM
        72°
        11AM
        77°
        12PM
        79°
        1PM
        81°
        2PM
        82°
        3PM
        83°
        4PM
        83°
        5PM
        83°
        6PM
        82°
        7PM
        80°
        7:21PM
        Sunset
        8PM
        77°
        9PM
        74°
        10PM
        73°
        11PM
        72°
        12AM
        71°
        Precipitation
        5%
        Pollen
        Grass Pollen
        Low
        Air Quality
        55
        Moderate
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.21 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point57°F
        5. Humidity 87%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KPHL Station History
        Almanac for September 8, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 70°F 83°F 98°F 1939
        4. Low 63°F 64°F 51°F 1938
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 80°F 82°F 93°F
        4. Low 63°F 64°F 49°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:35 AM 7:21 PM
        3. Civil Twilight 6:08 AM 7:48 PM
        4. Nautical Twilight 5:36 AM 8:21PM
        5. Astronomical Twilight 5:02 AM 8:54 PM
        1. Length of Visible Light 13h 40m
        2. Length of Day 12h 45m
        3. Tomorrow will be 2 minutes 33 seconds shorter
        1. Moon 3:28 AM 6:07 PM
        2. Waning Crescent10% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareersWeather Data APIs
        PWS NetworkWundermap
        Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
        essentialaccessibility.com
        We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
        Review All Privacy and Ad Settings
        Choose how my information is shared
        Data Rights
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary