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      Elev 856 ft, 40.721 °N 76.183 °W

      St. Clair, PA

      St. Clair Station73°
      Updated: 3:06 PM EDT on September 12, 2026 (GMT -4)
      4 minutes ago
      76°
      52°
      73
      Feels Like 73
      Cloudy
      N
      8
      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
        Today
        Sat 09/12
        High 76°f
         1% Precip. / 0 in
        Cloudy. High 76F. Winds SSE at 5 to 10 mph.
        Tonight
        Sat 09/12
        Low 66°f
         80% Precip. / 0.3 in
        Cloudy skies with periods of rain late. Low 66F. Winds light and variable. Chance of rain 80%. Rainfall near a quarter of an inch. Localized flooding is possible.
        Tomorrow
        Sun 09/13
        High 83°f63°f
         75% Precip. / 0.11 in
        Rain ending early. Breaks of sun in the afternoon. High 83F. Winds light and variable. Chance of rain 80%.
        Hourly Forecast
        Now
        73°
        4PM
        74°
        5PM
        73°
        6PM
        74°
        7PM
        74°
        7:18PM
        Sunset
        8PM
        72°
        9PM
        70°
        10PM
        70°
        11PM
        70°
        12AM
        32%
        70°
        1AM
        52%
        69°
        2AM
        80%
        68°
        3AM
        78%
        68°
        4AM
        78%
        68°
        5AM
        78%
        67°
        6AM
        76%
        67°
        6:43AM
        Sunrise
        7AM
        75%
        67°
        8AM
        43%
        68°
        9AM
        70°
        10AM
        73°
        11AM
        74°
        12PM
        77°
        1PM
        78°
        2PM
        80°
        3PM
        81°
        Precipitation
        80%
        Pollen
        None
        Air Quality
        46
        Good
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 30.04 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point63°F
        5. Humidity 71%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KZER Station History
        Almanac for September 12, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 76°F 78°F 97°F 1931
        4. Low 52°F 56°F 37°F 1917
        5. Rain/Snow Depth
        6. Precipitation 0.3 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for September 13, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 83°F 77°F 95°F
        4. Low 52°F 56°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:42 AM 7:18 PM
        3. Civil Twilight 6:14 AM 7:46 PM
        4. Nautical Twilight 5:42 AM 8:18PM
        5. Astronomical Twilight 5:08 AM 8:52 PM
        1. Length of Visible Light 13h 31m
        2. Length of Day 12h 36m
        3. Tomorrow will be 2 minutes 40 seconds shorter
        1. Moon 8:19 AM 7:49 PM
        2. Waxing Crescent2% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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