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      Heat Advisory
      until 10:00 PM PDT
      Elev 115 ft, 37.371 °N 122.033 °W

      Sunnyvale, CA

      Washington Station95°
      Updated: 1:28 PM PDT on September 9, 2026 (GMT -7)
      9 minutes ago
      99°
      64°
      95
      Feels Like 96
      Sunny
      N
      8
      Higher 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
        Thu 09/10
        High 99°f
         0% Precip. / 0 in
        Sun and clouds mixed. Hot. High 99F. Winds NNW at 10 to 15 mph.
        Tonight
        Thu 09/10
        Low 71°f
         1% Precip. / 0 in
        Partly cloudy skies. Low 71F. Winds NNW at 5 to 10 mph.
        Tomorrow
        Fri 09/11
        High 93°f59°f
         0% Precip. / 0 in
        Partly cloudy skies. Hot. High 93F. Winds NNW at 10 to 15 mph.
        Hourly Forecast
        Now
        96°
        2PM
        97°
        3PM
        98°
        4PM
        98°
        5PM
        96°
        6PM
        94°
        7PM
        89°
        7:24PM
        Sunset
        8PM
        85°
        9PM
        83°
        10PM
        81°
        11PM
        79°
        12AM
        78°
        1AM
        77°
        2AM
        76°
        3AM
        76°
        4AM
        76°
        5AM
        75°
        6AM
        74°
        6:46AM
        Sunrise
        7AM
        72°
        8AM
        75°
        9AM
        78°
        10AM
        82°
        11AM
        86°
        12PM
        89°
        1PM
        90°
        Precipitation
        1%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        51
        Moderate
        UV Index
        8
        Very High
        Additional Conditions
        1. Pressure 30.01 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point52°F
        5. Humidity 23%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KNUQ Station History
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 99°F 82°F 106°F 1944
        4. Low 64°F 59°F 43°F 1928
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 93°F 82°F 98°F
        4. Low 64°F 59°F 42°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:45 AM 7:24 PM
        3. Civil Twilight 6:19 AM 7:51 PM
        4. Nautical Twilight 5:47 AM 8:22PM
        5. Astronomical Twilight 5:15 AM 8:53 PM
        1. Length of Visible Light 13h 32m
        2. Length of Day 12h 39m
        3. Tomorrow will be 2 minutes 21 seconds shorter
        1. Moon 5:04 AM 6:43 PM
        2. Waning Crescent3% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
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