Portola Valley, CA Weather Forecast | 5 Day

Updated: Wed Jul 9th 2025 12:30 PM PDT

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Portola Valley, CA Weather Forecast - 7-9 - Partly Cloudy

Partly Cloudy

Wed 7-9

Partly Cloudy with a high of 78°F and a low of 57°F. Winds will be light at 10mph and gusts of 11.1mph at 4 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 72% at 11 PM and 46% being its lowest at 3 PM. Barometric pressure is its highest of 30.13inHg at 1 PM, a lowest point of 30.05inHg at 7 PM with an avg 30.08inHg.

    • HI: 78°F
    • LO: 57°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      9.6 mph
    • Humidity
      69% avg.
    • UV Index
      2.8
    • Air Quality
      Moderate
    • Sunrise
      05:56 AM
    • Sunset
      08:31 PM
    • Moonrise
      08:14 PM
    • Moonset
      04:25 AM
    • Moon Phase
      Waxing Gibbous
Portola Valley, CA Weather Forecast - 7-10 - Sunny

Sunny

Thu 7-10

Sunny with a high of 95°F and a low of 53°F. Winds will be light at 9mph and gusts of 9.3mph at 4 PM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 90% at 6 AM and 30% being its lowest at 2 PM. Barometric pressure is its highest of 30.05inHg at 12 AM, a lowest point of 29.88inHg at 11 PM with an avg 29.97inHg.

    • HI: 95°F
    • LO: 53°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      8.1 mph
    • Humidity
      60% avg.
    • UV Index
      2.9
    • Air Quality
      Moderate
    • Sunrise
      05:56 AM
    • Sunset
      08:31 PM
    • Moonrise
      09:00 PM
    • Moonset
      05:25 AM
    • Moon Phase
      Full Moon
Portola Valley, CA Weather Forecast - 7-11 - Sunny

Sunny

Fri 7-11

Sunny with a high of 91°F and a low of 55°F. Winds will be light at 7mph and gusts of 8.5mph at 9 PM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 83% at 5 AM and 35% being its lowest at 2 PM. Barometric pressure is its highest of 29.9inHg at 11 PM, a lowest point of 29.83inHg at 7 PM with an avg 29.86inHg.

    • HI: 91°F
    • LO: 55°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      6.3 mph
    • Humidity
      59% avg.
    • UV Index
      2.9
    • Air Quality
      Moderate
    • Sunrise
      05:57 AM
    • Sunset
      08:30 PM
    • Moonrise
      09:38 PM
    • Moonset
      06:30 AM
    • Moon Phase
      Waning Gibbous
Portola Valley, CA Weather Forecast - 7-12 - Sunny

Sunny

Sat 7-12

Sunny with a high of 88°F and a low of 58°F. Winds will be light at 6mph and gusts of 7.7mph at 1 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 85% at 5 AM and 30% being its lowest at 1 PM. Barometric pressure is its highest of 29.91inHg at 10 AM, a lowest point of 29.81inHg at 4 PM with an avg 29.87inHg.

    • HI: 88°F
    • LO: 58°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      6 mph
    • Humidity
      59% avg.
    • UV Index
      2.9
    • Air Quality
      Moderate
    • Sunrise
      05:58 AM
    • Sunset
      08:30 PM
    • Moonrise
      10:10 PM
    • Moonset
      07:39 AM
    • Moon Phase
      Waning Gibbous
Portola Valley, CA Weather Forecast - 7-13 - Sunny

Sunny

Sun 7-13

Sunny with a high of 86°F and a low of 57°F. Winds will be light at 7mph and gusts of 7.7mph at 6 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 78% at 5 AM and 33% being its lowest at 1 PM. Barometric pressure is its highest of 29.9inHg at 11 PM, a lowest point of 29.83inHg at 4 PM with an avg 29.87inHg.

    • HI: 86°F
    • LO: 57°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      6.7 mph
    • Humidity
      56% avg.
    • UV Index
      0
    • Air Quality
      Moderate
    • Sunrise
      05:58 AM
    • Sunset
      08:29 PM
    • Moonrise
      10:39 PM
    • Moonset
      08:47 AM
    • Moon Phase
      Waning Gibbous
Portola Valley, CA Weather Forecast - 7-14 - Sunny

Sunny

Mon 7-14

Sunny with a high of 87°F and a low of 58°F. Winds will be light at 8mph and gusts of 8.5mph at 2 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 73% at 5 AM and 30% being its lowest at 2 PM. Barometric pressure is its highest of 29.91inHg at 11 PM, a lowest point of 29.83inHg at 5 PM with an avg 29.88inHg.

    • HI: 87°F
    • LO: 58°F
    • Rainfall: 0%
    • Snowfall: 0%
    • Wind
      7.4 mph
    • Humidity
      52% avg.
    • UV Index
      6
    • Air Quality
      TBA
    • Sunrise
      05:59 AM
    • Sunset
      08:29 PM
    • Moonrise
      11:05 PM
    • Moonset
      09:55 AM
    • Moon Phase
      Waning Gibbous