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      Elev 148 ft, 39.896 °N 75.351 °W

      Swarthmore, PA

      Knauer Observatory Station61°
      Updated: 11:08 PM EDT on September 7, 2026 (GMT -4)
      9 minutes ago
      81°
      61°
      61
      Feels Like 61
      Clear
      N
      1
      Higher temperature is expected tomorrow
      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 60°f
         3% Precip. / 0 in
        Clear skies. Low around 60F. Winds light and variable.
        Tomorrow
        Tue 09/08
        High 84°f
         5% Precip. / 0 in
        Sunshine and clouds mixed. High 84F. Winds light and variable.
        Tomorrow night
        Tue 09/08
        Low 67°f
         7% Precip. / 0 in
        Partly cloudy. Low 67F. Winds light and variable.
        Hourly Forecast
        Now
        64°
        12AM
        63°
        1AM
        62°
        2AM
        61°
        3AM
        63°
        4AM
        62°
        5AM
        62°
        6AM
        62°
        6:35AM
        Sunrise
        7AM
        61°
        8AM
        64°
        9AM
        68°
        10AM
        72°
        11AM
        76°
        12PM
        78°
        1PM
        80°
        2PM
        81°
        3PM
        82°
        4PM
        83°
        5PM
        82°
        6PM
        81°
        7PM
        79°
        7:21PM
        Sunset
        8PM
        76°
        9PM
        73°
        10PM
        72°
        11PM
        71°
        Precipitation
        6%
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        41
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.2 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point56°F
        5. Humidity 76%
        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 81°F 83°F 98°F 1939
        4. Low 61°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 84°F 82°F 93°F
        4. Low 61°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
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