Weather forecast for tomorrowPortola Valley, CA
Weather forecast for tomorrow
Monday Oct 19, 2026
- 61°F
- 46°F
Mostly Cloudy
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 11mphWNW 296°
- Humidity: 68%
- UV index: 5
- Sunrise: 7:21 am PDT
- Sunset: 6:26 pm PDT
- details ▼
Tomorrow, in Portola Valley, the weather will also be mostly cloudy.
The highest temperature will be a breezy 60.8°F, while the lowest expected temperature is a brisk 46.4°F.
It will be colder, and the temperature will align more closely with November's average high of 61.9°F than October's.
Sunrise will be at 7:21 am and sunset at 6:26 pm; tomorrow's daylight will last for 11h and 5min.
The highest temperature will be a breezy 60.8°F, while the lowest expected temperature is a brisk 46.4°F.
It will be colder, and the temperature will align more closely with November's average high of 61.9°F than October's.
Sunrise will be at 7:21 am and sunset at 6:26 pm; tomorrow's daylight will last for 11h and 5min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 61°C.
Coldest period: 3 am - 6 am 50°C.
Coldest period: 3 am - 6 am 50°C.
Chance of precipitation
Highest chance: 12 am 20%.
Hourly weather forecast
- 12 am
- 52°F
- Feels like:52°F
Mostly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 4mphWNW 302°
- Humidity: 92%
- Pressure: 30"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 52°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 4mphW 279°
- Humidity: 91%
- Pressure: 30"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
- 4 am
- 50°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 3mphWNW 292°
- Humidity: 91%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 50°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 3mphWNW 283°
- Humidity: 89%
- Pressure: 29.97"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Sunrise: 7:21 am
- 8 am
- 52°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 4mphWNW 296°
- Humidity: 84%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 57°F
- Feels like:55°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphWNW 288°
- Humidity: 72%
- Pressure: 30"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 59°F
- Feels like:59°F
Mostly Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 7mphWNW 297°
- Humidity: 60%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 5
- details ▼
- 2 pm
- 61°F
- Feels like:59°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphWNW 301°
- Humidity: 58%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 59°F
- Feels like:57°F
Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphWNW 300°
- Humidity: 62%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 57°F
- Feels like:55°F
Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 9mphWNW 298°
- Humidity: 67%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:26 pm
- 8 pm
- 54°F
- Feels like:52°F
Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphWNW 296°
- Humidity: 77%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 52°F
- Feels like:52°F
Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 2mphNW 315°
- Humidity: 83%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, a combination of cloudy and sun-filled weather is anticipated.
The temperature will be between the lowest temperature of 50°F and the highest temperature of 60.8°F. The warmest part of the day will be from 1 pm to 3 pm.
The temperature will be more close to what’s typical for November than the usual maximum in October. The expected low will be also more comparable to what’s common in November than the current October average of 54.9°F.
The temperature will be between the lowest temperature of 50°F and the highest temperature of 60.8°F. The warmest part of the day will be from 1 pm to 3 pm.
The temperature will be more close to what’s typical for November than the usual maximum in October. The expected low will be also more comparable to what’s common in November than the current October average of 54.9°F.
Updated: Oct 18, 2026 @ 15:35:38 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
Tomorrow, a mostly gray sky is forecasted with minimal brightness.
Tomorrow, the maximum temperature will be 60.8°F, while the minimum temperature will be 46.4°F.
The maximum temperature will be relatively lower than the average highest temperature of 68.2°F in October. The lowest temperature will be also slightly cooler than the average low of 54.9°F.
The maximum temperature will be relatively lower than the average highest temperature of 68.2°F in October. The lowest temperature will be also slightly cooler than the average low of 54.9°F.
On Monday, in Portola Valley, sunrise will be at 7:21 am and sunset at 6:26 pm (PDT).
In Portola Valley, tomorrow, there will be 11h and 5min of daylight.
