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      Elev 243 ft, 37.316 °N 122.027 °W

      Cupertino, CA

      South Blaney Station63°
      Updated: 10:31 AM PDT on September 20, 2026 (GMT -7)
      10 minutes ago
      72°
      58°
      63
      Feels Like 63
      Cloudy
      N
      3
      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
        Mon 09/21
        High 72°f
         1% Precip. / 0 in
        Generally cloudy. High 72F. Winds N at 5 to 10 mph.
        Tonight
        Mon 09/21
        Low 55°f
         20% Precip. / 0 in
        Partly cloudy early with increasing clouds overnight. Low near 55F. Winds NNW at 5 to 10 mph.
        Tomorrow
        Tue 09/22
        High 76°f55°f
         8% Precip. / 0 in
        Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 76F. Winds NNE at 5 to 10 mph.
        Hourly Forecast
        Now
        63°
        11AM
        64°
        12PM
        67°
        1PM
        69°
        2PM
        70°
        3PM
        71°
        4PM
        71°
        5PM
        69°
        6PM
        68°
        7PM
        65°
        7:07PM
        Sunset
        8PM
        63°
        9PM
        62°
        10PM
        60°
        11PM
        60°
        12AM
        59°
        1AM
        59°
        2AM
        58°
        3AM
        57°
        4AM
        57°
        5AM
        57°
        6AM
        57°
        6:55AM
        Sunrise
        7AM
        56°
        8AM
        58°
        9AM
        60°
        10AM
        63°
        Precipitation
        20%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        41
        Good
        UV Index
        3
        Moderate
        Additional Conditions
        1. Pressure 29.97 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point53°F
        5. Humidity 70%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSJC Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 72°F 82°F 100°F 1943
        4. Low 58°F 54°F 40°F 1978
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 76°F 82°F 105°F
        4. Low 58°F 53°F 40°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:54 AM 7:07 PM
        3. Civil Twilight 6:28 AM 7:33 PM
        4. Nautical Twilight 5:57 AM 8:04PM
        5. Astronomical Twilight 5:26 AM 8:35 PM
        1. Length of Visible Light 13h 5m
        2. Length of Day 12h 13m
        3. Tomorrow will be 2 minutes 23 seconds shorter
        1. Moon 4:05 PM 12:40 AM
        2. Waxing Gibbous69% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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