Lexington Weather

Lexington, Massachusetts, USA

67°F

7/9/2025 11:39pm

Lexington Conditions: Mostly cloudy
Temperature: 67.3°F / 19.6°C
Dew Point: 64.9°F
Relative Humidity: 92%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.95 in Steady
Visibility: 10 miles
Rain Today: 0.41 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 040725
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
325 AM EDT Fri Jul 4 2025

.SYNOPSIS...

Quiet weather with less humidity for Independence Day into the 
weekend, but heat and humidity kick up for Sunday and the start of 
next week. Rain returns Tuesday into mid week. 

&&

.NEAR TERM /THROUGH TONIGHT/...

Key Messages...

* Dry, sunny, and less humid for Independence Day.  

We'll ring in the holiday weekend with a beautiful weather day for 
outdoor activities. A drier post frontal airmass ahead of building 
high pressure will bring seasonable high temperatures in the upper 
70s and low 80s across the region. Winds will be light out of the 
northwest. Overnight, lower dewpoints will allow temps to drop into 
the upper 50s outside of Cape Cod and the islands. 

&&

.SHORT TERM /SATURDAY/...

Key Messages...

* Dry and sunny Saturday, a bit warmer. 

Saturday mid level heights will be on the rise as 500 mb ridging 
moves overhead with high pressure at the surface. This keeps in 
place sunny skies with light winds, while weak WAA will allow high 
temps to creep up a few degrees into the mid-upper 80s. Even so, 
dewpoints remain in the 50s for most, so humidity remains 
comfortable. 

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...

Key Messages...

* Dry Sunday and Monday.

* Heat and humidity increase Sunday into early next week. 

* Chance for showers and thunderstorms returns Monday night into 
  Tuesday. 

The synoptic pattern features an east coast ridge on Sunday followed 
by generally zonal flow to start the week, then a mid level trough 
digs into the Midwest/Great Lakes Tue-Thu. SNE will be placed 
downstream of the trough, pumping up the heat and humidity on warm, 
moist SW flow through at least Monday. This brings the return of 90s 
for high temperatures Sunday and Monday with dewpoints in the upper 
60s and low 70s. A few shortwaves will round the base of the trough 
and move over SNE through the week bringing the risk for showers and 
thunderstorms, first around Tuesday then again toward Thursday. 
Confidence in timing and coverage is low at this point. 

&&

.AVIATION /08Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

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

06z TAF Update...High confidence.

SKC Fri Through Sat. Winds shift to NW tonight and could gust 
to 20kt Fri before diminishing. SW winds 5-10 kts on Sat. 

KBOS Terminal...High confidence in TAF. 

KBDL Terminal...High confidence in TAF. 

Outlook /Saturday Night through Tuesday/... 

Saturday Night through Sunday Night: VFR. Breezy. 

Monday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.

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

Tuesday: Breezy. Chance SHRA, chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today through Saturday...High confidence.

Winds/seas stay below small craft advisory thresholds through 
Saturday. Winds will generally be between 5 and 15 kts with wave 
heights between 2-3 ft on Friday and between 1-2 ft on Saturday.

Outlook /Saturday Night through Tuesday/...

Saturday Night: Winds less than 25 kt. 

Sunday through Sunday Night: Low risk for Small Craft Advisory
winds with gusts up to 30 kt. Areas of seas approaching 5 ft. 

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

Monday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers. 

Tuesday: Winds less than 25 kt. Chance of rain showers, slight
chance of thunderstorms. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

SYNOPSIS...BW
NEAR TERM...BW
SHORT TERM...BW
LONG TERM...BW
AVIATION...BW
MARINE...BW