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Official · NWS

Heat Advisory

until 5:00 am

Heat Advisory issued October 3 at 2:02AM PDT until October 5 at 10:00PM PDT by NWS San Francisco CA

Full text

* 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...From 11 AM this morning to 10 PM PDT Monday. * 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.

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.

Sonoma Coastal Range; North Bay Interior Mountains; North Bay Interior Valleys; San Francisco Bay Shoreline; East Bay Interior Valleys; Santa Cruz Mountains; Santa Clara Valley Including San Jose; Eastern Santa Clara Hills; East Bay Hills; Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

Computed

Heat advisory

Sat

Feels-like high near 33°C.

Computed

Heat advisory

Sun

Feels-like high near 33°C.

Computed

Heat advisory

Mon

Feels-like high near 32°C.

San Jose Weather

California 3:15 am local updated now

Clear sky

65°

Clear sky

Feels like 65°

94° 64° today's high / low
100

Perfect

Outdoor comfort right now

It is 65°F and clear sky in San Jose. Nothing wet on the radar for the next 24 hours. Tomorrow: partly cloudy, high 93°F.

  • Wind 1 mph ESE
  • Humidity 72%
  • Cloud 0%
  • UV peak 8
  • Rain chance 0%

Next 48 hours

Scroll sideways — or pick a day below.

Now

Clear sky

0

3am

Partly cloudy

2

4am

Partly cloudy

1

5am

Partly cloudy

1

6am

Partly cloudy

1

7am

Clear sky

2

8am

Clear sky

1

9am

Clear sky

1

10am

Clear sky

1

11am

Clear sky

2

12pm

Clear sky

3

1pm

Clear sky

4

2pm

Clear sky

5

3pm

Clear sky

6

4pm

Clear sky

8

5pm

Clear sky

8

6pm

Clear sky

6

7pm

Clear sky

4

8pm

Clear sky

3

9pm

Clear sky

2

10pm

Clear sky

1

11pm

Clear sky

1

12am

Sun

Clear sky

1

1am

Clear sky

1

2am

Partly cloudy

1

3am

Partly cloudy

1

4am

Partly cloudy

1

5am

Partly cloudy

1

6am

Partly cloudy

1

7am

Partly cloudy

1%

1

8am

Partly cloudy

1%

1

9am

Partly cloudy

1%

1

10am

Partly cloudy

1%

1

11am

Partly cloudy

2

12pm

Partly cloudy

2

1pm

Partly cloudy

3

2pm

Partly cloudy

5

3pm

Partly cloudy

6

4pm

Partly cloudy

7

5pm

Partly cloudy

7

6pm

Clear sky

6

7pm

Clear sky

4

8pm

Clear sky

2

9pm

Clear sky

2

10pm

Clear sky

2

11pm

Clear sky

2

12am

Mon

Clear sky

2

1am

Clear sky

2

Conditions in detail

  • Feels like

    65°

    About what it looks like

  • Dew point

    59°

    Comfortable

  • Wind

    1 mph

    Gusting 3 mph from ESE

  • Pressure

    29.85 inHg

    —

  • Visibility

    9.9 mi

    Clear

  • UV index

    0

    Peaks at 8 today

  • Cloud cover

    0%

    —

  • Precipitation today

    0.00"

    None expected

Air quality

US AQI

67

Moderate

  • PM2.5 26 µg/m³
  • PM10 29 µg/m³
  • Ozone 26 µg/m³
  • NO₂ 43 µg/m³

San Jose weather questions, answered

Will it rain in San Jose today?
No — the next 24 hours in San Jose look dry, with the chance of precipitation peaking at 0%.
How warm does it get in San Jose today?
San Jose reaches a high of 94°F and drops to 64°F overnight. Right now it is 65°F and feels like 65°F.
What is the best time to be outside in San Jose today?
8am looks like the pick — 66°F, clear sky, wind 1 mph. Outdoor comfort scores 100 out of 100 (perfect).
What is the weather in San Jose tomorrow?
Partly cloudy, with a high of 93°F and a low of 69°F — about the same as today. Chance of precipitation peaks at 1%.
What time is sunrise and sunset in San Jose?
The sun rises at 7:04 am and sets at 6:47 pm, giving 11h 43m of daylight.

About this San Jose forecast

Updated 2026-10-03 10:15 UTC, and refreshed automatically every few minutes. Forecast data is provided by Visual Crossing; radar frames from RainViewer; the 20-year normals and records from the ERA5 reanalysis archive. No national weather service publishes point alerts here, so only computed watches are shown.

Watches labelled computed are worked out on this site from forecast thresholds and are not official warnings — always defer to your national weather service. Need help reading a number? See the sourced weather guide.

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