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WeatherLive › California › Portola Valley

Portola Valley, CA Weather (94028)

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherPortola Valley · 10:31 AM PDT
76° | 55°
66°F
Feels like 65°
Mostly cloudy
WindNW 5 mph · Gusts 5 mph
Precip11% · –
Humidity72% · Dew point 56°
UV index9 Very high
Air Quality29 Good
Pressure30.03 inHg
Visibility6 mi
Sunrise / Sunset6:30 AM · 7:53 PM · 13h 23m

Weather map — Portola Valley

Full radar →
Now
66°
13%
5 mph
11:00
69°
17%
7 mph
12:00
69°
10%
9 mph
13:00
76°
6%
9 mph
14:00
71°
3%
10 mph
15:00
70°
3%
11 mph
16:00
69°
3%
9 mph
17:00
68°
4%
9 mph
18:00
67°
4%
8 mph
19:00
64°
13%
7 mph
20:00
60°
13%
6 mph
21:00
59°
13%
4 mph
22:00
57°
16%
4 mph
23:00
57°
15%
4 mph
00:00
57°
15%
4 mph
01:00
57°
14%
4 mph
02:00
56°
14%
4 mph
03:00
56°
15%
5 mph
04:00
55°
16%
5 mph
05:00
55°
17%
4 mph
06:00
55°
17%
4 mph
07:00
55°
18%
5 mph
08:00
56°
13%
4 mph
09:00
60°
8%
4 mph

Today · Fri 8/21

High 76°
11% / –

Sunny. Winds NW at 11 mph.

Tonight · Fri 8/21

Low 55°
13% / –

Sunny. Winds W at 4 mph.

Tomorrow · Sat 8/22

72° | 55°
8% / –

Sunny. Winds NW at 9 mph.

7-day trend

Portola Valley · temperature + precipitation

10-day forecast

Updated 10:31 AM

Details & indices

Wind
5 mph NW
Gusts 5 mph
Humidity
72%
Dew point 56°
Pressure
30.03 inHg
Rising
UV index
9 — Very high
High today
Air Quality
Good
AQI 29 · US EPA
Allergy
Very high
Mugwort
Visibility
6 mi
Clear view
Allergy — Portola Valley

🌿 Conditions right now

View all →
Birch
None
Grass
Moderate
Oak
None
Alder
None
Hazel
None
Mugwort
High
Ragweed
Moderate

Sun & moon

Sunrise6:30 AM
Sunset7:53 PM
Length of day13h 23m
Moonrise3:55 PM
Moonset12:12 AM
Moon phase🌓 First Quarter · 65%
Next full moonAug 27 Sturgeon Moon
Latitude37.3841°N
Longitude-122.2352°E

Water temps nearby

View all →
Santa Cruz Main Beach (32 mi)62°
Stinson Beach (42 mi)60°
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
🌤️
Los Angeles
—
—
San Diego
Sunny
81°
San Jose
Mostly cloudy
60°
San Francisco
Partly cloudy
60° 🌤️
Fresno
—
—
Sacramento
Mostly cloudy
74°
Data sources · Friday, August 21
Where the Portola Valley forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 37.3841°N, -122.2352°.
NBM + global weather models
Updated: 10:31 AM
ZIP codes in Portola Valley
📮
94020
Portola Valley
 📮
94021
Portola Valley
 📮
94028
Portola Valley
 📮
94060
Portola Valley
 📮
94074
Portola Valley
Weather in Portola Valley
Over the next 10 days Portola Valley tops out around 77° (Sunday) and dips to 54° on the coolest night (Saturday). The gauge should stay near zero — no meaningful precipitation is expected. Heads up: a Small Craft Advisory is in effect — check the alerts tab before making plans. Right now Portola Valley is about 21° cooler than nearby Fresno. Longer view: Mediterranean pattern — nearly all rain lands November through March.
Portola Valley, CA · Elev 459 ft · 37.38°N, 122.24°W · California · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 10:31 AM