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      Elev 26 ft, 41.025 °N 73.564 °W

      Old Greenwich, CT

      Old Greenwich Station73°
      Updated: 12:30 PM EDT on September 1, 2026 (GMT -4)
      3 minutes ago
      77°
      67°
      73
      Feels Like 75
      Rain
      N
      4
      Similar 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
        Today
        Tue 09/01
        High 77°f
         98% Precip. / 0.08 in
        Thunderstorms likely. A few storms may be severe. High 77F. Winds SSE at 5 to 10 mph. Chance of rain 100%.
        Tonight
        Tue 09/01
        Low 65°f
         45% Precip. / 0.09 in
        Scattered thunderstorms early, then cloudy skies after midnight. A few storms may be severe. Low around 65F. Winds NE at 10 to 15 mph. Chance of rain 50%.
        Tomorrow
        Wed 09/02
        High 73°f68°f
         21% Precip. / 0 in
        Cloudy. High 73F. Winds ENE at 10 to 15 mph.
        Hourly Forecast
        Now
        73°
        1PM
        83%
        74°
        2PM
        47%
        75°
        3PM
        86%
        76°
        4PM
        82%
        77°
        5PM
        75°
        6PM
        74°
        7PM
        72°
        7:26PM
        Sunset
        8PM
        46%
        70°
        9PM
        36%
        69°
        10PM
        34%
        68°
        11PM
        68°
        12AM
        68°
        1AM
        68°
        2AM
        67°
        3AM
        67°
        4AM
        67°
        5AM
        67°
        6AM
        67°
        6:21AM
        Sunrise
        7AM
        66°
        8AM
        67°
        9AM
        68°
        10AM
        69°
        11AM
        70°
        12PM
        70°
        Precipitation
        86%
        Storms continuing through 4 PM
        Pollen
        Grass Pollen
        Low
        Air Quality
        63
        Moderate
        UV Index
        3
        Moderate
        Additional Conditions
        1. Pressure 29.96 in
        2. Visibility 1.3 miles
        3. Clouds Cloudy
        4. Dew Point72°F
        5. Humidity 97%
        6. Rainfall 1.61 in
        7. Snow Depth 0 in
         KHPN Station History
        Almanac for September 1, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 80°F 93°F 1980
        4. Low 67°F 61°F 45°F 1976
        5. Rain/Snow Depth
        6. Precipitation 0.18 in 3.6 in -
        7. Snow 0 in 0 in -
        Almanac for September 2, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 73°F 80°F 93°F
        4. Low 67°F 61°F 44°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:21 AM 7:26 PM
        3. Civil Twilight 5:52 AM 7:54 PM
        4. Nautical Twilight 5:19 AM 8:28PM
        5. Astronomical Twilight 4:43 AM 9:03 PM
        1. Length of Visible Light 14h 2m
        2. Length of Day 13h 5m
        3. Tomorrow will be 2 minutes 37 seconds shorter
        1. Moon 9:22 PM 11:14 AM
        2. Waning Gibbous74% of the Moon is Illuminated
        Sep 4
        Waning Half Last Qtr
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Precipitation
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