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      Elev 351 ft, 37.875 °N 122.067 °W

      Walnut Creek, CA

      Rossmoor Station59°
      Updated: 8:58 PM PDT on October 21, 2026 (GMT -7)
      3 minutes ago
      69°
      54°
      59
      Feels Like 59
      Fair
      N
      3
      Similar temperature is expected tomorrow
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       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
        Tonight
        Thu 10/22
        Low 55°f
         50% Precip. / 0.04 in
        Partly cloudy skies this evening. Increasing clouds with periods of showers late. Low near 55F. Winds light and variable. Chance of rain 50%.
        Tomorrow
        Fri 10/23
        High 65°f
         74% Precip. / 0.32 in
        Cloudy with periods of rain. High near 65F. Winds SSW at 5 to 10 mph. Chance of rain 70%. Rainfall around a quarter of an inch.
        Tomorrow night
        Fri 10/23
        Low 53°f
         13% Precip. / 0 in
        Mostly cloudy skies early, then partly cloudy after midnight. Low 53F. Winds SSW at 5 to 10 mph.
        Hourly Forecast
        Now
        55°
        9PM
        56°
        10PM
        55°
        11PM
        55°
        12AM
        56°
        1AM
        34%
        55°
        2AM
        32%
        55°
        3AM
        34%
        55°
        4AM
        56°
        5AM
        32%
        56°
        6AM
        53%
        56°
        7AM
        71%
        56°
        7:23AM
        Sunrise
        8AM
        73%
        57°
        9AM
        62%
        58°
        10AM
        60%
        60°
        11AM
        69%
        62°
        12PM
        69%
        63°
        1PM
        62%
        64°
        2PM
        62%
        64°
        3PM
        56%
        64°
        4PM
        49%
        64°
        5PM
        37%
        63°
        6PM
        62°
        6:21PM
        Sunset
        7PM
        61°
        8PM
        60°
        Precipitation
        73%
        Rain possible after 1 AM
        Pollen
        None
        Air Quality
        33
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.83 in
        2. Visibility 9 miles
        3. Clouds Partly Cloudy
        4. Dew Point51°F
        5. Humidity 86%
        6. Rainfall 0.17 in
        7. Snow Depth 0 in
         KCCR Station History
        Almanac for October 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 69°F 70°F 92°F 1964
        4. Low 54°F 53°F 36°F 2004
        5. Rain/Snow Depth
        6. Precipitation 0.04 in 3.9 in -
        7. Snow 0 in 0 in -
        Almanac for October 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 65°F 70°F 90°F
        4. Low 55°F 53°F 38°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:22 AM 6:22 PM
        3. Civil Twilight 6:56 AM 6:49 PM
        4. Nautical Twilight 6:25 AM 7:19PM
        5. Astronomical Twilight 5:55 AM 7:50 PM
        1. Length of Visible Light 11h 52m
        2. Length of Day 10h 59m
        3. Tomorrow will be 2 minutes 16 seconds shorter
        1. Moon 4:03 PM 2:32 AM
        2. Waxing Gibbous80% of the Moon is Illuminated
        Oct 25
        Full Moon
        Nov 1
        Waning Half Last Qtr
        Nov 8
        New Moon
        Nov 17
        Waxing Half First Qtr
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