Hourly Weather | Tomorrow › Monday, October 5, 2026
Active Weather Warnings
San Mateo, California
12 AM
Night
70°
Feels Like 66°
0
Humidity: 66%
UV Index: 0
Wind: 6 mph
1 AM
Night
66°
Feels Like 64°
0
Humidity: 71%
UV Index: 0
Wind: 6 mph
2 AM
Night
66°
Feels Like 64°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
3 AM
Night
66°
Feels Like 64°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
4 AM
Night
64°
Feels Like 63°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
5 AM
Night
64°
Feels Like 64°
0
Humidity: 75%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 77%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 83%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 73%
UV Index: 1
Wind: 4 mph
9 AM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 65%
UV Index: 2
Wind: 4 mph
10 AM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 56%
UV Index: 3
Wind: 5 mph
11 AM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 51%
UV Index: 4
Wind: 5 mph
12 PM
Sunny Weather
82°
Feels Like 86°
0
Humidity: 46%
UV Index: 4
Wind: 6 mph
1 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 42%
UV Index: 5
Wind: 7 mph
2 PM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 38%
UV Index: 4
Wind: 8 mph
3 PM
Cloudy Weather
90°
Feels Like 91°
0
Humidity: 35%
UV Index: 4
Wind: 9 mph
4 PM
Cloudy Weather
88°
Feels Like 88°
0
Humidity: 36%
UV Index: 3
Wind: 9 mph
5 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 39%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
82°
Feels Like 81°
0
Humidity: 43%
UV Index: 1
Wind: 9 mph
7 PM
Cloudy Night
79°
Feels Like 75°
0
Humidity: 49%
UV Index: 0
Wind: 7 mph
8 PM
Night
75°
Feels Like 73°
0
Humidity: 54%
UV Index: 0
Wind: 6 mph
9 PM
Night
72°
Feels Like 70°
0
Humidity: 60%
UV Index: 0
Wind: 6 mph
10 PM
Night
70°
Feels Like 66°
0
Humidity: 66%
UV Index: 0
Wind: 6 mph
11 PM
Night
70°
Feels Like 66°
0
Humidity: 66%
UV Index: 0
Wind: 5 mph

Weather Alerts and Warnings for San Mateo

Moderate Expected Likely

Heat Advisory

Heat Advisory issued October 3 at 7:48PM PDT until October 7 at 10:00PM PDT by NWS San Francisco CA
Oct 3, 7:48 PM → Oct 7, 10:00 PM
WHAT: Hot conditions with maximum temperatures in the mid-90s to
low-100s. Mild minimum temperatures and weak onshore flow will
limit overnight relief.

WHERE: The East Bay and San Francisco Bay Shoreline, North Bay
Interior Mountains and Valleys, The Santa Clara Valley and Eastern
Hills, The Santa Cruz Mountains, Interior Monterey County and the
Santa Lucia Range, Most of San Benito County and the Cholame Hills
in Southeast Monterey County, and Southern Salinas Valley/Arroyo
Seco and Lake San Antonio.

WHEN: Until 10 PM PDT Wednesday.

IMPACTS: This level of heat affects anyone without effective
cooling and/or adequate hydration. Impacts likely in some health
systems, heat-sensitive industries and infrastructure.
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Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Updated: Oct 4, 1:25 AM Source: NWS Alert