Lexington Weather

Lexington, Massachusetts, USA

63°F

6/10/2026 6:10am

Lexington Conditions: Clear
Temperature: 63.0°F / 17.2°C
Dew Point: 54.9°F
Relative Humidity: 75%
Wind: Calm, 10-min avg: Calm, gust: 2 mph
Barometer: 29.88 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 080620
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
220 AM EDT Mon Jun 8 2026

.WHAT HAS CHANGED...
No significant forecast changes. 

&&

.KEY MESSAGES...

- Pleasant, dry, and seasonable weather today with low humidity
  and abundant sunshine. 
 
- Increasing heat and humidity this week with afternoon
  thunderstorm chances Wednesday through Friday.

&&

.DISCUSSION...
KEY MESSAGE 1...Pleasant, dry, and seasonable weather today with low 
humidity and abundant sunshine.

A really nice day is on tap for southern New England, featuring near-
seasonable high temperatures, low humidity, and plenty of sunshine. 
With the departure of the mid-level trough toward the Canadian 
Maritimes and surface high pressure building in from the west, flow 
today will be from the north to north-northeast. Earlier in the day, 
the pressure gradient between these two systems will support breezy 
winds around 10 to 15 mph, with somewhat higher gusts along the 
immediate coast. As the pressure gradient relaxes, winds gradually 
shift toward the southeast before becoming south-southwest after 
sunset. High temperatures this afternoon will generally range from 
the 70s to near 80 degrees, warmest inland and away from the 
influence of the ocean. Coastal areas will mainly remain in the 
lower 70s, though cannot rule out a few upper 60s across the outer 
Cape and Islands. 

With high pressure firmly overhead tonight and winds easing, 
conditions will favor radiational cooling. Temperatures fall into 
the 40s across many locations, while the urban core holds onto 
warmth with lows remaining in the middle 50s. Given the rainfall 
this past weekend, areas that decouple may experience patchy fog 
overnight.

KEY MESSAGE 2...Increasing heat and humidity this week with 
afternoon thunderstorm chances Wednesday through Friday.

Summerlike heat and humidity return this week as an anomalous mid-
level ridge and surface high pressure expand into the region. 
Tuesday kicks off the warming trend, with 850 mb temperatures 
climbing into the middle to upper teens, supporting daily afternoon 
highs in the upper 80s to lower 90s. NWS HeatRisk guidance 
highlights the potential for heat impacts, with widespread moderate 
impacts and isolated pockets of major impacts, particularly across 
urban centers by late week. One possible fly in the ointment will be 
cloud cover and storm coverage during the middle to latter half of 
the week, which could keep temperatures just cool enough to avoid 
the need for heat-related headlines. Nevertheless, those who work 
outdoors should prepare for another stretch of unseasonably warm 
temperatures. Additionally, there will be little in the way of 
nighttime relief, with overnight lows generally remaining in the 60s.

As previously mentioned, cloud cover and storm chances increase 
during the middle to latter part of the week. By Wednesday, southern 
New England will reside near the base of the mid-level ridge with 
more zonal flow aloft. This pattern supports the potential for 
ribbons of mid-level energy traversing the CONUS, which could 
trigger scattered showers and thunderstorms within an increasingly 
warm, humid, and unstable airmass. Timing any thunderstorm remains 
difficult, as these details are often resolved on the mesoscale. 
However, there is moderate confidence in daily afternoon shower and 
thunderstorm chances Wednesday through Friday. Summerlike heat may 
persist into the upcoming weekend. FWIW, the hazardous weather 
outlook currently highlights portions of central and western 
southern New England for hazardous heat.

&&

.AVIATION /06Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

06Z TAF Update:

Through 12Z...High confidence in trends, moderate confidence in 
timing.

Drying conditions continue, with MVFR ceilings improving to VFR. N 
to NNE winds 10 to 13 kt.

Today...High confidence.

VFR and dry. NNE/NE winds to begin the day, eventually backing to 
the SW between 18-22Z from east to west.

Tonight...High confidence.

VFR and dry. SSW/SW winds 6 to 12 kt. Protected terminals, including 
KBED and KORE, may experience light to calm winds with patchy ground 
fog.

Tuesday...High confidence.

VFR and dry. WSW/SW winds 8 to 12 kt, with locally stronger gusts 
across coastal RI, southeast MA, Cape Cod, and the Islands, where 
gusts of 20 to 25 kt are possible.

KBOS Terminal...High confidence.

NNE/NE winds this morning become E to ESE this afternoon, then shift 
to the S/SSW by evening.

KBDL Terminal...High confidence.

Outlook /Tuesday Night through Friday/...

Tuesday Night: VFR. Breezy. 

Wednesday: Mainly VFR, with local MVFR possible. Breezy. Chance
SHRA, slight chance TSRA.

Wednesday Night: Mainly VFR, with local IFR possible. Breezy.
Chance SHRA, slight chance TSRA.

Thursday: VFR. Breezy. Chance SHRA, slight chance TSRA.

Thursday Night: VFR. Slight chance SHRA.

Friday: VFR. Slight chance SHRA, slight chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Today through Tuesday...High confidence.

In the wake of a departing cold front, north-northeast wind gusts up 
to 25 kt will gradually subside this afternoon as high pressure 
builds in from the northwest and settles across the southern New 
England waters by Tuesday afternoon. This will lead to more tranquil 
boating conditions later this afternoon and again Tuesday.

Winds shift to the southwest Tuesday, though sufficient inland 
heating may lead to stronger nearshore wind gusts, mainly from Block 
Island Sound to Buzzards Bay and Vineyard Sound. Here, wind gusts 
may approach 20 to 25 kt and could warrant a short-duration Small 
Craft Advisory.

Otherwise, seas continue to subside today, ranging from 3 to 5 ft, 
with the roughest seas across the outer southeastern waters. Seas 
then diminish to 2 to 3 ft Tuesday, though localized 3 to 4 ft seas 
are possible in the aforementioned waters with the higher gusts.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Winds less than 25 kt. Seas locally approaching
5 ft. 

Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 25 kt. Areas of seas approaching 5 ft. 

Wednesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 25 kt. Seas up to 5 ft. Chance of rain
showers, chance of thunderstorms. 

Thursday through Thursday Night: Winds less than 25 kt. Seas up
to 5 ft. Slight chance of rain showers. 

Friday: Winds less than 25 kt. Seas locally approaching 5 ft. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 10 AM EDT this morning for 
     ANZ231>235-237-250-251.
     Small Craft Advisory until 4 PM EDT this afternoon for 
     ANZ254>256.

&&

$$

DISCUSSION...Dooley
AVIATION...Dooley
MARINE...Dooley