Lexington Weather

Lexington, Massachusetts, USA

79°F
7/12/2026 3:46pm 
  • Lexington Conditions: Partly cloudy
  • Temperature: 79.2°F / 26.2°CWarmer 0.2°F than last hour.
  • Dew Point: 58.3°FDecreased 1.1°Fsince last hour.
  • Relative Humidity: 49%Decreased 2.0% since last hour.
  • Wind: Calm, 10-min avg: Calm, gust: 1 mph
  • Barometer: 30.12 in Steady
  • Visibility: 10 miles
  • Rain Today: 0.00 in
  •   

Extreme Heat Watch

Issued by the National Weather Service - Los Angeles, CA

    EXTREME HEAT WATCH  

Santa Clarita Valley, CA; Los Angeles County Inland Coast including Downtown Los Angeles, CA; Western San Fernando Valley, CA; Eastern San Fernando Valley, CA; Santa Susana Mountains, CA; Los Angeles County San Gabriel Valley, CA

Extreme Heat Watch issued July 12 at 1:46AM PDT until July 16 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH THURSDAY EVENING

Areas Affected: Santa Clarita Valley; Los Angeles County Inland Coast including Downtown Los Angeles; Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Los Angeles County San Gabriel Valley

Urgency: Future

Severity: Severe

Certainty: Likely

Alert Sent: Sunday 1:46am PDT

Alert Effective: Sunday 1:46am PDT

Alert Expires: Sunday 10:15pm PDT (expect updated alert by this time)

Event Onset: Tuesday 10:00am PDT

Event Ends: Thursday 8:00pm PDT

Issued by: NWS Los Angeles/Oxnard CA

Details: 
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH THURSDAY EVENING...

* WHAT...For the Heat Advisory starting Sunday, temperatures of 85
to 98 expected. For the Extreme Heat Watch, dangerously hot
conditions with temperatures of 90 to 108 possible. Warmest
temperatures expected in the valleys.

* WHERE...Eastern San Fernando Valley, Los Angeles County Inland
Coast including Downtown Los Angeles, Los Angeles County San
Gabriel Valley, Santa Clarita Valley, Santa Susana Mountains, and
Western San Fernando Valley.

* WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT
Tuesday. For the Extreme Heat Watch, from Tuesday morning through
Thursday evening.

* IMPACTS...There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors. There is a high risk
for heat illness for sensitive populations including the very
young, the very old, those without air conditioning, and those
active outdoors.

* ADDITIONAL DETAILS...Monsoonal moisture will add to the discomfort
level from the heat starting on Sunday. continuing through the
week.

Information: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Monitor the latest forecasts and warnings for updates.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.57f4e361b32fe1f46d2f573f0a356aa75c0c8379.002.2
Codes: CAZ088, CAZ368, CAZ372, CAZ373, CAZ375, CAZ548
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.57f4e361b32fe1f46d2f573f0a356aa75c0c8379.002.2