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, clouds will hold steady, keeping conditions mostly dim.
The highest temperature will be a breezy 60.8°F, while the lowest temperature will be a chilly 46.4°F.
The projected high resembles November more than October, matching 61.9°F rather than 68.2°F.
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 temperature will be a chilly 46.4°F.
The projected high resembles November more than October, matching 61.9°F rather than 68.2°F.
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 284°
- 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, on Monday, a combination of cloudy and sunny weather is forecasted.
The temperature will vary 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 expected temperature aligns more with November's average high than with October's 68.2°F. 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 vary 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 expected temperature aligns more with November's average high than with October's 68.2°F. 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 @ 16:55:48 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
On Monday, a dense overcast layer will shape the day’s outlook.
Tomorrow, the maximum temperature will be 60.8°F, while the minimum temperature will be 46.4°F.
The maximum temperature will be a couple of degrees 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 a couple of degrees 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).
Tomorrow, the daylight will last for 11h and 5min.
