Lexington Weather

Lexington, Massachusetts, USA

80°F
7/15/2026 10:00am 
  • Lexington Conditions: Clear
  • Temperature: 79.9°F / 26.6°CWarmer 0.9°F than last hour.
  • Dew Point: 73.2°FIncreased 0.5°Fsince last hour.
  • Relative Humidity: 80%Decreased 1.0% since last hour.
  • Wind: Calm, 10-min avg: Calm, gust: 3 mph
  • Barometer: 29.67 in Steady
  • Visibility: 9 miles
  • Rain Today: 0.00 in
  •   
Southeast Middlesex County, MA - Air Quality Alert - Air Quality Alert - Air Quality Alert
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Air Quality Alert

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

    AIR QUALITY ALERT  

Southeast Middlesex County, MA

Air Quality Alert issued July 15 at 9:13AM EDT by NWS Boston/Norton MA

AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT EDT TONIGHT

Areas Affected: Western Franklin; Eastern Franklin; Northern Worcester; Central Middlesex County; Western Essex; Eastern Essex; Western Hampshire; Western Hampden; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Southern Bristol; Southern Plymouth; Barnstable; Dukes; Nantucket; Northwest Middlesex County

Urgency: Unknown

Severity: Unknown

Certainty: Unknown

Alert Sent: Wednesday 9:13am EDT

Alert Effective: Wednesday 9:13am EDT

Alert Expires: Thursday 12:00am EDT

Event Onset: Wednesday 9:13am EDT

Issued by: NWS Boston/Norton MA

Details: 
...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

The Massachusetts Department of Environmental Protection has issued
an Air Quality Alert for Fine Particulates, until midnight EDT
tonight.

An Air Quality Alert day means that Fine Particulates concentrations
within the region may approach or exceed levels that are Unhealthy
for Sensitive Groups.

Air is unhealthy for sensitive children and adults, such as those
with asthma, lung or heart disease, and older adults. Sensitive
children and adults should limit prolonged outdoor activity.

For additional information, please visit the Massachusetts
Department of Environmental Protection website at:
https://mass.gov/dep/massair/forecast

Meta data: 
ID: urn:oid:2.49.0.1.840.0.5feca13a077b6cb54ff4489d45d6c829c936877e.001.1
Codes: MAZ002, MAZ003, MAZ004, MAZ005, MAZ006, MAZ007, MAZ008, MAZ009, MAZ010, MAZ011, MAZ012, MAZ013, MAZ014, MAZ015, MAZ016, MAZ017, MAZ018, MAZ019, MAZ020, MAZ021, MAZ022, MAZ023, MAZ024, MAZ026
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5feca13a077b6cb54ff4489d45d6c829c936877e.001.1

 

    AIR QUALITY ALERT  

Southeast Middlesex County, MA

Air Quality Alert issued July 15 at 9:09AM EDT by NWS Boston/Norton MA

AIR QUALITY ALERT IN EFFECT UNTIL NOON EDT THURSDAY

Areas Affected: Western Franklin; Eastern Franklin; Northern Worcester; Central Middlesex County; Western Essex; Eastern Essex; Western Hampshire; Western Hampden; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Southern Bristol; Southern Plymouth; Barnstable; Dukes; Nantucket; Northwest Middlesex County

Urgency: Unknown

Severity: Unknown

Certainty: Unknown

Alert Sent: Wednesday 9:09am EDT

Alert Effective: Wednesday 9:09am EDT

Alert Expires: Thursday 12:00am EDT

Event Onset: Wednesday 9:09am EDT

Issued by: NWS Boston/Norton MA

Details: 
...AIR QUALITY ALERT IN EFFECT UNTIL NOON EDT THURSDAY...

The Massachusetts Department of Environmental Protection has issued
an Air Quality Alert for Fine Particulates, until noon EDT Thursday.

An Air Quality Alert day means that Fine Particulates concentrations
within the region may approach or exceed levels that are Unhealthy
for Sensitive Groups.

Air is unhealthy for sensitive children and adults, such as those
with asthma, lung or heart disease, and older adults. Sensitive
children and adults should limit prolonged outdoor activity.

For additional information, please visit the Massachusetts
Department of Environmental Protection website at:
https://mass.gov/dep/massair/forecast

Meta data: 
ID: urn:oid:2.49.0.1.840.0.2a5721b33371f4f5efe3b2643e7f9f39b61be783.001.1
Codes: MAZ002, MAZ003, MAZ004, MAZ005, MAZ006, MAZ007, MAZ008, MAZ009, MAZ010, MAZ011, MAZ012, MAZ013, MAZ014, MAZ015, MAZ016, MAZ017, MAZ018, MAZ019, MAZ020, MAZ021, MAZ022, MAZ023, MAZ024, MAZ026
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2a5721b33371f4f5efe3b2643e7f9f39b61be783.001.1

 

    AIR QUALITY ALERT  

Southeast Middlesex County, MA

Air Quality Alert issued July 15 at 8:50AM EDT by NWS Boston/Norton MA

AIR QUALITY ALERT IN EFFECT UNTIL NOON EDT THURSDAY

Areas Affected: Western Franklin; Eastern Franklin; Northern Worcester; Central Middlesex County; Western Essex; Eastern Essex; Western Hampshire; Western Hampden; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Southern Bristol; Southern Plymouth; Barnstable; Dukes; Nantucket; Northwest Middlesex County

Urgency: Unknown

Severity: Unknown

Certainty: Unknown

Alert Sent: Wednesday 8:50am EDT

Alert Effective: Wednesday 8:50am EDT

Alert Expires: Thursday 12:00am EDT

Event Onset: Wednesday 8:50am EDT

Issued by: NWS Boston/Norton MA

Details: 
...AIR QUALITY ALERT IN EFFECT UNTIL NOON EDT THURSDAY...

The Massachusetts Department of Environmental Protection has issued
an Air Quality Alert for Ground Level Ozone, until noon EDT
Thursday.

An Air Quality Alert day means that Ground Level Ozone
concentrations within the region may approach or exceed levels that
are Unhealthy for Sensitive Groups.

Air is unhealthy for sensitive children and adults, such as those
with asthma, lung or heart disease, and older adults. Sensitive
children and adults should limit prolonged outdoor activity.

For additional information, please visit the Massachusetts
Department of Environmental Protection website at:
https://mass.gov/dep/massair/forecast

Meta data: 
ID: urn:oid:2.49.0.1.840.0.37128d2d0cd71020e966bfa623482fc8cdf5bb65.001.1
Codes: MAZ002, MAZ003, MAZ004, MAZ005, MAZ006, MAZ007, MAZ008, MAZ009, MAZ010, MAZ011, MAZ012, MAZ013, MAZ014, MAZ015, MAZ016, MAZ017, MAZ018, MAZ019, MAZ020, MAZ021, MAZ022, MAZ023, MAZ024, MAZ026
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.37128d2d0cd71020e966bfa623482fc8cdf5bb65.001.1