Portola Valley Hourly Weather Forecast
Next 12 Hours
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Sunny skies in the morning, with Clear conditions expected by night. Warming trend from 57°F to 72°. Light winds, shifting from SW to WNW at 5.5 mph, while humidity ranges from 47% to 91%, and an avg barometric pressure of 30.09 inHg.
Temp
Feel
Humidity
Wind
Pressure
Dew Point
UV
Precip.
5 AM
57°F
57°F
89%
2.9 SW
30.09
54°F
0
13%
6 AM
57°F
57°F
90%
3.1 WSW
30.1
54°F
0
13%
7 AM
57°F
57°F
91%
2.9 SW
30.11
55°F
0
14%
8 AM
58°F
57°F
87%
2.7 WSW
30.12
54°F
0.3
12%
9 AM
61°F
61°F
76%
2.9 W
30.12
54°F
1.1
8%
10 AM
65°F
63°F
68%
4.3 NW
30.12
54°F
2.6
5%
11 AM
67°F
65°F
62%
5.8 NW
30.11
53°F
4.5
4%
12 PM
68°F
66°F
58%
6.9 NNW
30.1
53°F
6.1
3%
1 PM
70°F
66°F
54%
7.8 NW
30.08
52°F
6.9
2%
2 PM
72°F
67°F
49%
8.7 NW
30.06
51°F
6.5
2%
3 PM
72°F
68°F
47%
8.3 NW
30.04
51°F
5.1
1%
4 PM
72°F
67°F
47%
9.2 WNW
30.03
51°F
3.2
1%
This hour by hour weather report is valid for ZIP code 94028, accurately covering the area of Portola Valley, CA.
Currently
|
58°F |
30.08 inHg.
Barometer 89%
Humidity SW 2.9mph Wind |
| Clear | ||
National Outlook
More Flash Flooding Expected in the Southwest and Plains: 09-17 to 09-19
Thu Sep 17th 2026, 5:06am PDT
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