Weather in Portola Valley, United States
Weather Advisories
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Tomorrow's weather summary
The weather in Portola Valley on Friday, April 26th, is going to be cloudy throughout the day, with some clouds around noon.
There's seems to be also high probability of few clouds before dawn around 12 am.
Weather information for Portola Valley, on Friday, April 26th:
The highest temperature of the day will be 46°F around 3 pm. The day will have very high relative humidity, with average humidity of 78%, ranging from 51% to a maximum value of 94% at about midnight. The wind will be breezy, and will get up to 12 mph at 6 pm, blowing from the north-west. The cloud coverage will range from 0% around 9 pm to as high as 100% around 10 am with an average of 59%.
The chances of precipitation throughout the day will change between 0% and 20%. The highest chance for precipitation will be around 7 am and the lowest probability around midnight. The dew point will range from 27°F up to a maximum value of 33°F around midnight.
The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1010 hPa. Sunrise will be at 5:53 am, and sunset at 7:47 pm, making it a total of 13 hours and 54 minutes of daylight.
Air quality forecast for Portola Valley, on Friday, April 26th:
On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 28 and 32.
Pollen forecast for Portola Valley, on Friday, April 26th:
Tree pollen on this day is expected to have medium risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.
The weather in Portola Valley on Saturday, April 27th, is going to be cloudy throughout the day, with some clouds before dawn.
There's seems to be also high probability of few clouds before dawn around 1 am.
Weather information for Portola Valley, on Saturday, April 27th:
The maximum temperature of the day is going to be 47°F around 3 pm. The day will have very high relative humidity, with average humidity of 72%, ranging from 51% to a maximum value of 95% at about 4 am. The wind will be light, and will get up to 7 mph at midnight, blowing from the north-west. The cloud coverage will range from 10% around midnight to as high as 100% around 8 pm with an average of 74%.
The chances of precipitation throughout the day will change between 0% and 5%. The highest chance for precipitation will be around 7 pm and the lowest probability around midnight. The dew point will range from 28°F up to a maximum value of 32°F around 5 pm.
The visibility is expected to be good with average visibility of 11 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1012 hPa. Sunrise will be at 5:52 am, and sunset at 7:48 pm, making it a total of 13 hours and 56 minutes of daylight.
Air quality forecast for Portola Valley, on Saturday, April 27th:
On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 30 and 41.
Pollen forecast for Portola Valley, on Saturday, April 27th:
Tree pollen on this day is expected to have very high risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.
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