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Portola Valley, CA 94028 Weather

It is 50°F in Portola Valley, CA 94028, observed at 4:10 AM PDT. Today: Mostly Cloudy, high 63°F, low 49°F. Hourly and 10-day forecast from the National Weather Service. Times are local (PDT).

Portola Valley, CA 94028 current weather

50°F

Mostly Cloudy

H 63° / L 49°Feels like 50°

Observed at LOS ALTOS (4.8 mi away), 10/31/2026, 4:10 AM PDT

1 active alert

From the National Weather Service for this forecast zone or county

State alerts

Minor1Minimal to no known threat

Hourly forecast

NWS, updated 10/31/2026, 1:26 AM PT

  1. Now49°
  2. 5 AM49°
  3. 6 AM49°
  4. 7 AM49°
  5. 8 AM49°
  6. 9 AM52°
  7. 10 AM56°
  8. 11 AM60°
  9. 12 PM61°
  10. 1 PM62°
  11. 2 PM62°
  12. 3 PM62°
  13. 4 PM61°
  14. 5 PM59°10%
  15. 6 PM55°
  16. 7 PM52°11%
  17. 8 PM51°10%
  18. 9 PM50°11%
  19. 10 PM50°12%
  20. 11 PM49°41%
  21. 12 AM49°36%Sun
  22. 1 AM49°37%
  23. 1 AM49°46%
  24. 2 AM48°35%
  25. 3 AM48°36%
  26. 4 AM48°11%
  27. 5 AM47°
  28. 6 AM48°10%
  29. 7 AM48°
  30. 8 AM50°
  31. 9 AM54°
  32. 10 AM58°
  33. 11 AM60°
  34. 12 PM61°
  35. 1 PM62°
  36. 2 PM62°
  37. 3 PM62°
  38. 4 PM59°
  39. 5 PM57°
  40. 6 PM54°
  41. 7 PM51°
  42. 8 PM49°
  43. 9 PM48°
  44. 10 PM48°
  45. 11 PM47°
  46. 12 AM47°Mon
  47. 1 AM46°
  48. 2 AM46°

10-day forecast

Tap a day for details

  • Today10/3110% chance of precipitationLow 49°High 63°

    Saturday: Mostly cloudy. High near 63, with temperatures falling to around 59 in the afternoon. Southwest wind 0 to 3 mph.

    Overnight: Mostly cloudy, with a low around 49. Southwest wind around 1 mph.

    Mostly Cloudy
  • Sun11/110% chance of precipitationLow 46°High 62°

    Sunday: Sunny, with a high near 62. Northwest wind 2 to 8 mph.

    Sunday Night: Mostly clear, with a low around 46. North wind 1 to 8 mph.

    Sunny
  • Mon11/211% chance of precipitationLow 49°High 68°

    Monday: Mostly sunny, with a high near 68.

    Monday Night: Mostly cloudy, with a low around 49.

    Mostly Sunny
  • Tue11/327% chance of precipitationLow 48°High 64°

    Tuesday: A chance of rain showers between 10am and 4pm, then a slight chance of rain. Partly sunny, with a high near 64.

    Tuesday Night: A slight chance of rain before 4am. Partly cloudy, with a low around 48.

    Chance Rain Showers then Slight Chance Light Rain
  • Wed11/414% chance of precipitationLow 50°High 65°

    Wednesday: Mostly sunny, with a high near 65.

    Wednesday Night: Partly cloudy, with a low around 50.

    Mostly Sunny
  • Thu11/512% chance of precipitationLow 49°High 65°

    Thursday: Mostly sunny, with a high near 65.

    Thursday Night: Partly cloudy, with a low around 49.

    Mostly Sunny
  • Fri11/612% chance of precipitationLow High 68°

    Friday: Sunny, with a high near 68.

    Sunny
  • Sat11/7Model blendLow 53°High 73°

    Saturday: Mostly sunny. High near 73°. Low that night near 53°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sun11/8Model blendLow 53°High 73°

    Sunday: Partly cloudy. High near 73°. Low that night near 53°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Mon11/9Model blend11% chance of precipitationLow 52°High 70°

    Monday: Partly cloudy. High near 70°. Low that night near 52°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 37.373, -122.226 from the NWS MTR office, updated 10/31/2026, 1:26 AM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KPAO (Palo Alto Arpt, 9 mi), model run 10/31/2026, 1:00 AM PDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now49°Mostly Cloudy1%1 mph
  2. 5 AM49°Mostly Cloudy1%1 mph
  3. 6 AM49°Mostly Cloudy1%1 mph
  4. 7 AM49°Mostly Cloudy1%1 mph
  5. 8 AM49°Mostly Cloudy1%1 mph
  6. 9 AM52°Mostly Cloudy1%0 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the weather in Portola Valley, CA 94028 right now?
The latest observation from LOS ALTOS was 50°F, reported at 10/31/2026, 4:10 AM PDT.
What is the high temperature today in Portola Valley, CA 94028?
The National Weather Service forecast for saturday calls for a high near 63°F. Mostly Cloudy.
Will it rain in Portola Valley, CA 94028 in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Portola Valley, CA 94028?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 7 to Nov 9) come from the NOAA National Blend of Models, with highs of 70°F to 73°F. Model guidance this far out often changes.
What time is sunrise and sunset in Portola Valley, CA 94028 today?
Sunrise is about 7:32 AM PDT and sunset is about 6:11 PM PDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Portola Valley, CA 94028?
At Woodside Fire Stn 1, the 1991 to 2020 normal high in October is 80°F and the normal low is 46°F.

Rain and snow totals

Next 3 days, NWS forecast grid

Rain (liquid)
0.05 in
Snow
0.00 in
Ice
0.00 in

Nearby hazards

California hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

AQI forecast today (Redwood City)
39GoodPM2.5
AQI forecast tomorrow (Redwood City)
33GoodPM2.5

UV index guide · Air quality

Drought

By county

San Mateo County, week of 10/27/2026

No drought or abnormal dryness in this county.

Tides nearby

NOAA tide stations

Beaches nearby

EPA BEACON beaches

Sun and moon

Local time, center of the area

Sunrise
7:32 AM
Sunset
6:11 PM
Daylight
10 hr 39 min
Moon
Waning Gibbous 71% lit
First light (civil dawn)
7:06 AM
Last light (civil dusk)
6:38 PM
Moonrise
11:21 PM
Moonset
1:35 PM

Normal October weather

Climate

Normal October high 80°, low 46°. 1991 to 2020 normals at Woodside Fire Stn 1, 4 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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