Weather forecast for 10 daysPortola Valley, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 72°F
- 48°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphWNW 289°
- Humidity: 60%
- UV index: 5
- Sunrise: 7:20 am PDT
- Sunset: 6:27 pm PDT
- details ▼
Today, on Sunday, October 18, skies are expected to be clear and full of sunshine.
Temperatures will oscillate between a pleasant 71.6°F at their highest and a chilly 48.2°F at their lowest.
Today's temperature is anticipated to match October's standard peak of 68.2°F.
Sunrise was at 7:20 am and sunset will be at 6:27 pm; the daylight will last for 11h and 8min.
Temperatures will oscillate between a pleasant 71.6°F at their highest and a chilly 48.2°F at their lowest.
Today's temperature is anticipated to match October's standard peak of 68.2°F.
Sunrise was at 7:20 am and sunset will be at 6:27 pm; the daylight will last for 11h and 8min.
10-day overview
Daily temperatures
Warmest day: today 72°C.
Coldest day: tomorrow 61°C.
Coldest day: tomorrow 61°C.
Chance of precipitation
Highest chance: Wednesday 59%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 72°F
- 48°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphWNW 289°
- Humidity: 60%
- UV index: 5
- Sunrise: 7:20 am PDT
- Sunset: 6:27 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 61°F
- 46°F
Mostly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 11mphWNW 296°
- Humidity: 68%
- UV index: 5
- Sunrise: 7:21 am PDT
- Sunset: 6:26 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 66°F
- 50°F
Cloudy
- Precip. probability: 16%
- Precipitation: 0.16"
- Wind: 6mphNE 34°
- Humidity: 68%
- UV index: 3
- Sunrise: 7:22 am PDT
- Sunset: 6:25 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 63°F
- 50°F
Showers
- Precip. probability: 59%
- Precipitation: 0.16"
- Wind: 5mphENE 58°
- Humidity: 80%
- UV index: 3
- Sunrise: 7:23 am PDT
- Sunset: 6:24 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 63°F
- 50°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 9mphWNW 292°
- Humidity: 82%
- UV index: 4
- Sunrise: 7:23 am PDT
- Sunset: 6:22 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 66°F
- 48°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 9mphNNW 340°
- Humidity: 75%
- UV index: 5
- Sunrise: 7:24 am PDT
- Sunset: 6:21 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 70°F
- 48°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 8mphN 5°
- Humidity: 62%
- UV index: 5
- Sunrise: 7:25 am PDT
- Sunset: 6:20 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 68°F
- 48°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 8mphN 0°
- Humidity: 64%
- UV index: 4
- Sunrise: 7:26 am PDT
- Sunset: 6:19 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 66°F
- 46°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 9mphNNW 333°
- Humidity: 66%
- UV index: 4
- Sunrise: 7:27 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 66°F
- 46°F
Mostly Sunny
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 9mphN 350°
- Humidity: 64%
- UV index: 4
- Sunrise: 7:28 am PDT
- Sunset: 6:16 pm PDT
- details ▼
Models point to a combination of primarily gloomy and occasionally mostly clear and showery weather is forecasted.
With light precipitation of 0.16", rain is forecasted for Tuesday and Wednesday.
In the upcoming days, the highest temperature will vary between 60.8°F and 71.6°F, while the lowest nightly temperature differences will be negligible, as the minimum temperature will fluctuate between 46.4°F and 50°F.
Today is the warmest day, with a maximum temperature of 71.6°F; expect the coldest day on Monday with a high of 60.8°F.
With light precipitation of 0.16", rain is forecasted for Tuesday and Wednesday.
In the upcoming days, the highest temperature will vary between 60.8°F and 71.6°F, while the lowest nightly temperature differences will be negligible, as the minimum temperature will fluctuate between 46.4°F and 50°F.
Today is the warmest day, with a maximum temperature of 71.6°F; expect the coldest day on Monday with a high of 60.8°F.
Updated: Oct 18, 2026 @ 14:31:58 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Today, sunshine will likely continue with scattered clouds at most.
Today, the highest temperature will be 71.6°F, while the lowest temperature will be 48.2°F.
The maximum temperature today will be in line with the average highest temperature in October. The lowest temperature today will be relatively lower than the average low temperature.
The maximum temperature today will be in line with the average highest temperature in October. The lowest temperature today will be relatively lower than the average low temperature.
On Sunday, in Portola Valley, sunrise was at 7:20 am and sunset will be at 6:27 pm (PDT).
In Portola Valley, today, there will be 11h and 8min of daylight.
