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      Elev 856 ft, 40.721 °N 76.183 °W

      St. Clair, PA

      St. Clair Station75°
      Updated: 4:42 PM EDT on September 12, 2026 (GMT -4)
      2 minutes ago
      75°
      50°
      75
      Feels Like 75
      Cloudy
      N
      5
      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
        Sat 09/12
        Low 65°f
         78% Precip. / 0.25 in
        A few showers early becoming a steady rain overnight. Low around 65F. Winds light and variable. Chance of rain 80%. Rainfall near a quarter of an inch. Localized flooding is possible.
        Tomorrow
        Sun 09/13
        High 81°f
         82% Precip. / 0.14 in
        Showers in the morning, then partly cloudy in the afternoon. High 81F. Winds light and variable. Chance of rain 80%.
        Tomorrow night
        Sun 09/13
        Low 61°f
         18% Precip. / 0 in
        A few clouds from time to time. A stray shower or thunderstorm is possible. Low 61F. Winds WNW at 5 to 10 mph.
        Hourly Forecast
        Now
        75°
        5PM
        75°
        6PM
        75°
        7PM
        73°
        7:18PM
        Sunset
        8PM
        72°
        9PM
        71°
        10PM
        70°
        11PM
        70°
        12AM
        34%
        68°
        1AM
        61%
        68°
        2AM
        78%
        67°
        3AM
        69%
        66°
        4AM
        64%
        66°
        5AM
        76%
        66°
        6AM
        73%
        66°
        6:43AM
        Sunrise
        7AM
        82%
        66°
        8AM
        55%
        66°
        9AM
        33%
        68°
        10AM
        71°
        11AM
        72°
        12PM
        75°
        1PM
        77°
        2PM
        78°
        3PM
        79°
        4PM
        79°
        Precipitation
        82%
        Pollen
        None
        Air Quality
        48
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.02 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point64°F
        5. Humidity 70%
        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 75°F 78°F 97°F 1931
        4. Low 50°F 56°F 37°F 1917
        5. Rain/Snow Depth
        6. Precipitation 0.25 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for September 13, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 81°F 77°F 95°F
        4. Low 50°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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