San Jose, California Weather:
Active Weather Warnings
Friday, March 20, 2026
Sunny Weather
Day 90°
Night 59°
Precipitation 2 %
Wind 7 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (March 20, 2025)
Cloudy Weather

Day

64°

Night

41°

Wind

9 mph

UV Index

5

Precipitation

0 %

Weather Alerts and Warnings for

Moderate Expected Likely

Heat Advisory

Heat Advisory issued March 16 at 9:51PM PDT until March 20 at 8:00PM PDT by NWS San Francisco CA
Mar 16, 9:51 PM Mar 20, 8:00 PM
WHAT: High temperatures in the low to mid 90s across the interior
and 80s along the coastline.

WHERE: The Bay Area and Central Coast.

WHEN: Until 8 PM PDT Friday.

IMPACTS: This level of heat affects most individuals sensitive to
heat, especially those without effective cooling and/or adequate
hydration. Impacts possible in some health systems and in
heat-sensitive industries. Hot conditions can cause heat illnesses.

ADDITIONAL DETAILS: Much above normal temperatures in the upper
80s to mid 90s are expected this week across the Bay Area and
Central Coast. Portions of the interior Central Coast may reach the
upper 90s starting mid to late week. Overnight lows in the upper
50s to low 60s will offer some relief to the lower elevations but
will offer minimal relief within the higher elevations. Conditions
will be much above normal along the coast this week but coastal
residents may experience more relief overnight than those across
the interior. The risk of heat related illnesses will increase with
each additional day of heating from this event.
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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: Mar 17, 3:07 AM Source: NWS Alert