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      Heat Advisory
      until 10:00 PM PDT
      Elev 154 ft, 37.347 °N 122.019 °W

      Sunnyvale, CA

      Panama Park Station100°
      Updated: 1:20 PM PDT on September 10, 2026 (GMT -7)
      9 minutes ago
      95°
      66°
      100
      Feels Like 100
      Sunny
      N
      10
      Gusts 16 mph
      Lower 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
        Fri 09/11
        High 94°f
         0% Precip. / 0 in
        Sunshine and clouds mixed. Hot. High 94F. Winds NNW at 10 to 20 mph.
        Tonight
        Fri 09/11
        Low 60°f
         5% Precip. / 0 in
        Partly cloudy skies. Low around 60F. Winds NNW at 10 to 15 mph.
        Tomorrow
        Sat 09/12
        High 81°f57°f
         5% Precip. / 0 in
        Partly cloudy skies. High 81F. Winds NNW at 10 to 15 mph.
        Hourly Forecast
        Now
        95°
        2PM
        95°
        3PM
        95°
        4PM
        94°
        5PM
        90°
        6PM
        86°
        7PM
        82°
        7:22PM
        Sunset
        8PM
        78°
        9PM
        74°
        10PM
        72°
        11PM
        70°
        12AM
        69°
        1AM
        67°
        2AM
        66°
        3AM
        64°
        4AM
        63°
        5AM
        63°
        6AM
        62°
        6:47AM
        Sunrise
        7AM
        61°
        8AM
        63°
        9AM
        66°
        10AM
        69°
        11AM
        73°
        12PM
        76°
        1PM
        78°
        Precipitation
        6%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        25
        Good
        UV Index
        8
        Very High
        Additional Conditions
        1. Pressure 29.95 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point48°F
        5. Humidity 20%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSJC Station History
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 95°F 82°F 98°F 1903
        4. Low 66°F 59°F 42°F 1893
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 11, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 81°F 82°F 100°F
        4. Low 66°F 59°F 44°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:46 AM 7:23 PM
        3. Civil Twilight 6:19 AM 7:49 PM
        4. Nautical Twilight 5:48 AM 8:20PM
        5. Astronomical Twilight 5:16 AM 8:52 PM
        1. Length of Visible Light 13h 29m
        2. Length of Day 12h 36m
        3. Tomorrow will be 2 minutes 22 seconds shorter
        1. Moon 6:15 AM 7:09 PM
        2. New0% 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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