Lexington Weather

Lexington, Massachusetts, USA

79°F

7/13/2026 8:40pm

Lexington Conditions: Clear
Temperature: 78.6°F / 25.9°C
Dew Point: 65.8°F
Relative Humidity: 65%
Wind: Calm, 10-min avg: Calm, gust: 3 mph
Barometer: 30.01 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Southeast Middlesex County, MA - Heat Advisory
- SEE ALL NEARBY ALERTS -

Watches, Warnings, and Advisories

Issued by the National Weather Service - Los Angeles, CA

EXTREME HEAT WARNING

Santa Ynez Mountains Eastern Range, CA

Extreme Heat Warning issued July 13 at 8:38AM PDT until July 16 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT THURSDAY

Areas Affected: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Southeastern Ventura County Valleys; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

Urgency: Expected

Severity: Severe

Certainty: Likely

Alert Sent: Monday 8:38am PDT

Alert Effective: Monday 8:38am PDT

Alert Expires: Monday 8:45pm 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:

...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT THURSDAY...

* WHAT...Temperatures of 90 to 110 degrees, hottest on Wednesday and
over interior areas.

* WHERE...A portion of southwest California.

* WHEN...From 10 AM Tuesday to 8 PM PDT Thursday.

* 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.

* ADDITIONAL DETAILS...Humid conditions will add to the heat to
potentially worsen heat impacts. Effects of the heat will build
through the week, with warm overnight low temperatures providing
little relief from the heat.

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.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Stay cool, stay hydrated, stay informed.

Monitor the latest forecasts and warnings for updates.

Meta data:

ID: urn:oid:2.49.0.1.840.0.f80b55ca679926f085521f1fa4223e7a9d86cea3.004.2
Codes: CAZ349, CAZ350, CAZ351, CAZ352, CAZ356, CAZ357, CAZ358, CAZ369, CAZ370, CAZ371, CAZ374, CAZ381, CAZ382, CAZ383
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f80b55ca679926f085521f1fa4223e7a9d86cea3.004.2

FIRE WEATHER WATCH

Santa Ynez Mountains Eastern Range, CA

Fire Weather Watch issued July 13 at 1:13PM PDT until July 16 at 9:00AM PDT by NWS Los Angeles/Oxnard CA

FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING FOR STRONG NORTHWEST TO NORTH WINDS ALONG WITH LOW RELATIVE HUMIDITY AND HOT TEMPERATURES FOR THE MOUNTAINS AND SOUTH COAST OF SANTA BARBARA COUNTY AS WELL AS THE VENTURA COUNTY MOUNTAINS AND INTERSTATE 5 CORRIDOR

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Monday 1:13pm PDT

Alert Effective: Monday 1:13pm PDT

Alert Expires: Thursday 9:00am PDT

Event Onset: Wednesday 3:00pm PDT

Event Ends: Thursday 9:00am PDT

Issued by: NWS Los Angeles/Oxnard CA

Details:

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING FOR STRONG NORTHWEST TO NORTH WINDS ALONG WITH LOW RELATIVE HUMIDITY AND HOT TEMPERATURES FOR THE MOUNTAINS AND SOUTH COAST OF SANTA BARBARA COUNTY AS WELL AS THE VENTURA COUNTY MOUNTAINS AND INTERSTATE 5 CORRIDOR...

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING FOR STRONG NORTHWEST TO NORTH WINDS ALONG WITH
LOW RELATIVE HUMIDITY AND HOT TEMPERATURES FOR THE MOUNTAINS AND
SOUTH COAST OF SANTA BARBARA COUNTY AS WELL AS THE VENTURA COUNTY
MOUNTAINS AND INTERSTATE 5 CORRIDOR...

.Strong northwest to north winds, hot temperatures, and low
relative humidity will produce the potential for critical fire-
weather conditions late Wednesday through early Thursday.

The National Weather Service in Los Angeles/Oxnard has issued a
Fire Weather Watch for strong northwest to north winds along with
low relative humidity and hot temperatures, which is in effect
from Wednesday afternoon through Thursday morning.

* WINDS...Northwest to north winds 20 to 30 mph with gusts of 45
to 55 mph, strongest in Sundowner wind prone areas of southern
Santa Barbara County.

* RELATIVE HUMIDITY...10 to 25 percent.

* IMPACTS...If fire ignition occurs, conditions are favorable for
extreme fire behavior, rapid fire growth, and long range
spotting, which could threaten life and property. The hot air
mass will also contribute to the potential for significant
vertical plume growth.

Information:

A Fire Weather Watch means that critical fire weather conditions
are likely to occur in the coming days. Residents near wildland
interfaces should prepare now on what to do if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

Meta data:

ID: urn:oid:2.49.0.1.840.0.0fa02664ae07525c4a00662fc9a73e21a5989da9.001.1
Codes: CAZ349, CAZ350, CAZ351, CAZ352, CAZ353, CAZ376, CAZ377, CAZ378
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0fa02664ae07525c4a00662fc9a73e21a5989da9.001.1