Lexington Weather

Lexington, Massachusetts, USA

69°F
5/19/2026 1:10am 
  • Lexington Conditions: Clear
  • Temperature: 69.4°F / 20.8°CColder 0.2°F than last hour.
  • Dew Point: 62.6°FDecreased 0.2°Fsince last hour.
  • Relative Humidity: 79% 
  • Wind: Calm, 10-min avg: Calm, gust: None
  • Barometer: 30.01 in Steady
  • Visibility: 10 miles
  • Rain Today: 0.00 in
  •   
Southeast Middlesex County, MA - Heat Advisory - Air Quality Alert
 - SEE ALL NEARBY ALERTS -

Heat Advisory

Issued by the National Weather Service - Boston / Norton, MA

    HEAT ADVISORY  

Central Middlesex County, MA; Southeast Middlesex County, MA; Western Essex, MA; Eastern Essex, MA; Western Norfolk, MA; Suffolk, MA; Eastern Norfolk, MA; Northern Bristol, MA; Western Plymouth, MA; Eastern Plymouth, MA; Eastern Franklin, MA; Northern Worcester, MA; Eastern Hampshire, MA; Eastern Hampden, MA; Southern Worcester, MA; Northwest Middlesex County, MA

Heat Advisory issued May 18 at 12:57PM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

HEAT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 8 PM EDT WEDNESDAY

Areas Affected: Hartford; Tolland; Windham; Eastern Franklin; Northern Worcester; Central Middlesex County; Western Essex; Eastern Essex; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Northwest Middlesex County; Northwest Providence; Southeast Providence; Western Kent; Eastern Kent

Urgency: Expected

Severity: Moderate

Certainty: Likely

Alert Sent: Monday 12:57pm EDT

Alert Effective: Monday 12:57pm EDT

Alert Expires: Tuesday 7:00am EDT (expect updated alert by this time)

Event Onset: Tuesday 11:00am EDT

Event Ends: Wednesday 8:00pm EDT

Issued by: NWS Boston/Norton MA

Details: 
...HEAT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 96 expected.

* WHERE...Much of Southern New England, except for the eastern
slopes of the Berkshires, the Rhode Island and Massachusetts South
Coast, Cape Cod and the Islands.

* WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday.

* IMPACTS...Hot temperatures, a moderate degree of humidity with
little relief Tuesday night may cause heat illnesses.

* ADDITIONAL DETAILS...This is the first multi-day period of hot
temperatures. Those not yet accustomed to hot temperatures with a
moderate degree of humidity should take appropriate heat-related
precautions.

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

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.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.911a25b7b41f35497e3c07f0ef1833791d47e18f.001.1
Codes: MAZ003, MAZ004, MAZ005, MAZ006, MAZ007, MAZ010, MAZ011, MAZ012, MAZ013, MAZ014, MAZ015, MAZ016, MAZ017, MAZ018, MAZ019, MAZ026
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.911a25b7b41f35497e3c07f0ef1833791d47e18f.001.1