Hourly Weather Forecast - Portola Valley, CA

12 AM
52°F
90%
5mph
S
Light Rain
Humidity
92%
Feels like
52°F
Dew Point
50°F
1 AM
52°F
90%
5mph
S
Thunderstorms
Humidity
93%
Feels like
52°F
Dew Point
50°F
2 AM
51°F
90%
5mph
S
Thunderstorms
Humidity
95%
Feels like
51°F
Dew Point
50°F
3 AM
52°F
90%
5mph
S
Thunderstorms
Humidity
93%
Feels like
52°F
Dew Point
50°F
4 AM
52°F
90%
5mph
S
Thunderstorms
Humidity
92%
Feels like
52°F
Dew Point
50°F
5 AM
53°F
90%
4mph
S
Thunderstorms
Humidity
91%
Feels like
53°F
Dew Point
50°F
6 AM
53°F
90%
4mph
S
Rain
Humidity
90%
Feels like
53°F
Dew Point
50°F
7 AM
53°F
90%
4mph
S
Rain
Humidity
89%
Feels like
53°F
Dew Point
50°F
7:23 AM
8 AM
54°F
100%
4mph
S
Rain
Humidity
92%
Feels like
54°F
Dew Point
51°F
9 AM
55°F
100%
4mph
SSW
Rain
Humidity
89%
Feels like
55°F
Dew Point
51°F
10 AM
55°F
100%
4mph
SSW
Rain
Humidity
85%
Feels like
55°F
Dew Point
51°F
11 AM
56°F
100%
4mph
SSW
Thunderstorms
Humidity
84%
Feels like
56°F
Dew Point
51°F
12 PM
56°F
100%
4mph
SSW
Thunderstorms
Humidity
83%
Feels like
56°F
Dew Point
51°F
1 PM
56°F
100%
4mph
SSW
Thunderstorms
Humidity
85%
Feels like
56°F
Dew Point
51°F
2 PM
55°F
100%
4mph
SW
Rain Showers
Humidity
89%
Feels like
55°F
Dew Point
51°F
3 PM
54°F
100%
4mph
SW
Rain Showers
Humidity
93%
Feels like
54°F
Dew Point
52°F
4 PM
52°F
90%
3mph
SW
Rain Showers
Humidity
97%
Feels like
52°F
Dew Point
51°F
5 PM
51°F
90%
3mph
SSW
Rain Showers
Humidity
98%
Feels like
51°F
Dew Point
51°F
5:04 PM
6 PM
50°F
90%
3mph
SSW
Rain Showers
Humidity
96%
Feels like
50°F
Dew Point
49°F
7 PM
49°F
90%
2mph
SSW
Rain Showers
Humidity
95%
Feels like
49°F
Dew Point
48°F
8 PM
49°F
80%
3mph
SSW
80% Chance Rain Showers
Humidity
93%
Feels like
49°F
Dew Point
47°F
9 PM
48°F
80%
2mph
SSW
80% Chance Rain Showers
Humidity
91%
Feels like
48°F
Dew Point
46°F
10 PM
48°F
80%
2mph
SSW
80% Chance Rain Showers
Humidity
92%
Feels like
48°F
Dew Point
46°F
11 PM
47°F
70%
3mph
SSW
70% Chance Rain Showers
Humidity
93%
Feels like
47°F
Dew Point
45°F

Rain and Snow Totals Through Friday

2026 Opens with Heavy Rain, Mountain Snow in the West

Significant rain and heavy mountain snow will continue to batter California and the rest of the West for the first few days of 2026.

Friday's Weather Outlook

Extended Weekend Weather Outlook

St. Louis Tornado - May 16th, 2025

2025 Year in Review: Billion-Dollar Disasters From May through June

EF3 tornado damage near Plantersville, Alabama

2025 Year in Review: Billion-Dollar Disasters From February Through April

Photos and videos from the Palisades Fire that started in the City of Los Angeles, January 8, 2025. (CAL FIRE_Official via Wikimedia Commons)

2025 Year in Review: Billion Dollar Disasters - The California Wildfires

Large wall of dust approaching Phoenix Sky Harbor Airport at around 5:30 PM MST (Photo credit: Mike Olbinski via NWS)

2025 Year in Review: Extreme Weather - July Through December

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide