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      Elev 112 ft, 40.178 °N 75.454 °W

      Collegeville, PA

      Yerkes Station61°
      Updated: 9:38 AM EDT on September 28, 2026 (GMT -4)
      4 minutes ago
      66°
      58°
      61
      Feels Like 61
      Cloudy
      N
      6
      Similar temperature is expected today
      Wundermap
      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
        Today
        Mon 09/28
        High 66°f
         24% Precip. / 0 in
        Cloudy skies. High 66F. Winds NNW at 5 to 10 mph.
        Tonight
        Mon 09/28
        Low 57°f
         9% Precip. / 0 in
        Cloudy skies this evening will become partly cloudy after midnight. Low 57F. Winds light and variable.
        Tomorrow
        Tue 09/29
        High 73°f53°f
         9% Precip. / 0 in
        Mostly cloudy skies early will become partly cloudy later in the day. High 73F. Winds light and variable.
        Hourly Forecast
        Now
        60°
        10AM
        61°
        11AM
        62°
        12PM
        63°
        1PM
        64°
        2PM
        65°
        3PM
        65°
        4PM
        65°
        5PM
        66°
        6PM
        66°
        6:48PM
        Sunset
        7PM
        64°
        8PM
        63°
        9PM
        63°
        10PM
        61°
        11PM
        61°
        12AM
        60°
        1AM
        60°
        2AM
        59°
        3AM
        59°
        4AM
        59°
        5AM
        59°
        6AM
        58°
        6:56AM
        Sunrise
        7AM
        58°
        8AM
        60°
        9AM
        62°
        Precipitation
        24%
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        19
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 29.86 in
        2. Visibility 5 miles
        3. Clouds Cloudy
        4. Dew Point59°F
        5. Humidity 96%
        6. Rainfall 0.44 in
        7. Snow Depth 0 in
         KPTW Station History
        Almanac for September 28, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 66°F 73°F 91°F 1998
        4. Low 58°F 48°F 30°F 1991
        5. Rain/Snow Depth
        6. Precipitation 0 in 2.9 in -
        7. Snow 0 in 0 in -
        Almanac for September 29, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 73°F 73°F 82°F
        4. Low 58°F 47°F 33°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:55 AM 6:48 PM
        3. Civil Twilight 6:28 AM 7:15 PM
        4. Nautical Twilight 5:56 AM 7:47PM
        5. Astronomical Twilight 5:24 AM 8:19 PM
        1. Length of Visible Light 12h 47m
        2. Length of Day 11h 53m
        3. Tomorrow will be 2 minutes 37 seconds shorter
        1. Moon 7:34 PM 9:06 AM
        2. Waning Gibbous93% of the Moon is Illuminated
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 26
        Full Moon
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