Lexington Weather

Lexington, Massachusetts, USA

68°F
7/28/2026 7:34am 
  • Lexington Conditions: Mist, Overcast
  • Temperature: 68.2°F / 20.1°CWarmer 0.7°F than last hour.
  • Dew Point: 66.4°FIncreased 1.1°Fsince last hour.
  • Relative Humidity: 94%Increased 1.0% since last hour.
  • Wind: Calm, 10-min avg: Calm, gust: None
  • Barometer: 29.71 in Steady
  • Visibility: 4 miles
  • Rain Today: 0.00 in
  •   

Watches, Warnings, and Advisories

Issued by the National Weather Service - NWS Tucson Arizona

    EXTREME HEAT WARNING  

Tohono O'odham Nation including Sells, AZ

Extreme Heat Warning issued July 28 at 1:19AM MST until August 2 at 8:00PM MST by NWS Tucson AZ

EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM MST SUNDAY

Areas Affected: Western Pima County Including Ajo/Organ Pipe Cactus National Monument; Tohono O'odham Nation including Sells; Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford

Urgency: Expected

Severity: Severe

Certainty: Likely

Alert Sent: Tuesday 1:19am MST

Alert Effective: Tuesday 1:19am MST

Alert Expires: Tuesday 5:00pm MST (expect updated alert by this time)

Event Onset: Thursday 10:00am MST

Event Ends: Sunday 8:00pm MST

Issued by: NWS Tucson AZ

Details: 
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM MST SUNDAY...

* WHAT...Dangerously hot conditions with temperatures 101 to 106 in
Santa Cruz and Cochise Counties and 107 to 112 elsewhere. Major to
Extreme HeatRisk is expected.

* WHERE...Eastern Cochise County below 5000 feet, South Central Pinal
County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro
Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper
Santa Cruz River Valley/Altar Valley, and Western Pima County.

* WHEN...From 10 AM Thursday to 8 PM MST Sunday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

* ADDITIONAL DETAILS...Warm overnight low temperatures of 84 to 90
degrees will provide little to no relief from heat overnight.
Warmest overnight low temperatures expected in the Western Deserts.

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

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.

Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when possible and
drink plenty of water.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.029beb0041cea97b826354e597dcd24e7d602aa7.001.1
Codes: AZZ501, AZZ502, AZZ503, AZZ504, AZZ505, AZZ506, AZZ507, AZZ508, AZZ509
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.029beb0041cea97b826354e597dcd24e7d602aa7.001.1