Lexington Weather

Current Conditions [‒] Current Conditions [+]

67.8°F Colder than last hour.

19.9°C

Muggy

Mostly cloudy

This Afternoon: Hi 70 °F

Tonight: Lo 57 °F

Dew Point: 62.8°F Decreased 0.2°F since last hour.

Humidity: 84% Increased 1.0% since last hour.

Air Quality Index: 23

Good

(Fine Particles)

Barometer: 29.99 in S

1016 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.14 in

Rain Tuesday: 0.37 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Thursday through Tuesday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Sep 30, 2026 2:45pm EDT

Overview:

- Warm and pleasant stretch of weather arrives later this afternoon through Friday evening.

- Next chance for showers arrives Friday evening along and ahead of a rather strong cold front.

- Dry and seasonable this weekend, but with more clouds on Sunday.

- Much cooler autumn airmass settles over Southern New England early to middle of next week.

This Afternoon:

Partly Sunny

Hi 70 °F

Partly sunny, with a high near 70. Southwest wind around 3 mph.

Tonight:

Mostly Cloudy then Patchy Fog

Lo 57 °F

Patchy fog after 1am. Mostly cloudy, with a low around 57. South wind around 3 mph.

Thursday:

Patchy Fog then Partly Sunny

Hi 79 °F

Patchy fog before 7am. Partly sunny, with a high near 79. Southwest wind 3 to 9 mph.

Thursday Night:

Partly Cloudy

Lo 67 °F

Partly cloudy, with a low around 67. Southwest wind around 7 mph.

Friday:

Mostly Sunny

Hi 81 °F

Mostly sunny, with a high near 81. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

Friday Night:

Chance Rain Showers

Lo 55 °F

A chance of rain showers between 7pm and 2am. Mostly cloudy, with a low around 55. West wind around 8 mph. Chance of precipitation is 40%.

Saturday:

Sunny

Hi 67 °F

Sunny, with a high near 67. North wind 5 to 8 mph.

Saturday Night:

Mostly Clear

Lo 46 °F

Mostly clear, with a low around 46. Northeast wind around 5 mph.

Sunday:

Sunny

Hi 64 °F

Sunny, with a high near 64. East wind around 6 mph.

Sunday Night:

Partly Cloudy

Lo 49 °F

Partly cloudy, with a low around 49. South wind 2 to 6 mph.

Monday:

Mostly Sunny

Hi 67 °F

Mostly sunny, with a high near 67. West wind 3 to 9 mph.

Monday Night:

Mostly Clear

Lo 41 °F

Mostly clear, with a low around 41. Northwest wind around 8 mph.

Tuesday:

Sunny

Hi 56 °F

Sunny, with a high near 56. Northwest wind around 9 mph.

Tuesday Night:

Mostly Clear

Lo 38 °F

Mostly clear, with a low around 38. Northwest wind 3 to 7 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Fri 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Sep 30, 2026 2:45pm EDT

5:00pm

Partly Sunny

69°F
Dew Pt 61°F
Wind from S

S 3 mph
Precip: 0%

6:00pm

Mostly Cloudy

66°F
Dew Pt 61°F
Wind from S

S 2 mph
Precip: 0%

7:00pm

Mostly Cloudy

65°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 0%

8:00pm

Mostly Cloudy

63°F
Dew Pt 60°F
Wind from S

S 3 mph
Precip: 0%

9:00pm

Mostly Cloudy

60°F
Dew Pt 59°F
Wind from S

S 3 mph
Precip: 0%

10:00pm

Mostly Cloudy

59°F
Dew Pt 59°F
Wind from SW

SW 3 mph
Precip: 0%

11:00pm

Mostly Cloudy

59°F
Dew Pt 58°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
12:00am

Mostly Cloudy

58°F
Dew Pt 58°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
1:00am

Patchy Fog

57°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
2:00am

Patchy Fog

57°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
3:00am

Patchy Fog

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
4:00am

Patchy Fog

57°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
5:00am

Patchy Fog

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
6:00am

Patchy Fog

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
7:00am

Mostly Cloudy

58°F
Dew Pt 57°F
Wind from SW

SW 3 mph
Precip: 0%

Thu
8:00am

Partly Sunny

60°F
Dew Pt 59°F
Wind from SW

SW 5 mph
Precip: 1%

Thu
9:00am

Partly Sunny

64°F
Dew Pt 61°F
Wind from SW

SW 5 mph
Precip: 1%

Thu
10:00am

Partly Sunny

68°F
Dew Pt 63°F
Wind from SW

SW 5 mph
Precip: 1%

Thu
11:00am

Partly Sunny

71°F
Dew Pt 64°F
Wind from SW

SW 6 mph
Precip: 2%

Thu
12:00pm

Mostly Sunny

74°F
Dew Pt 64°F
Wind from SW

SW 7 mph
Precip: 2%

Thu
1:00pm

Mostly Sunny

75°F
Dew Pt 63°F
Wind from SW

SW 8 mph
Precip: 2%

Thu
2:00pm

Partly Sunny

77°F
Dew Pt 63°F
Wind from SW

SW 8 mph
Precip: 2%

Thu
3:00pm

Mostly Sunny

77°F
Dew Pt 63°F
Wind from SW

SW 9 mph
Precip: 3%

Thu
4:00pm

Partly Sunny

77°F
Dew Pt 63°F
Wind from SW

SW 8 mph
Precip: 3%

Thu
5:00pm

Partly Sunny

77°F
Dew Pt 63°F
Wind from SW

SW 7 mph
Precip: 4%

Thu
6:00pm

Partly Cloudy

75°F
Dew Pt 63°F
Wind from SW

SW 7 mph
Precip: 3%

Thu
7:00pm

Mostly Cloudy

73°F
Dew Pt 63°F
Wind from SW

SW 7 mph
Precip: 3%

Thu
8:00pm

Partly Cloudy

73°F
Dew Pt 62°F
Wind from SW

SW 7 mph
Precip: 0%

Thu
9:00pm

Mostly Clear

69°F
Dew Pt 62°F
Wind from SW

SW 7 mph
Precip: 0%

Thu
10:00pm

Partly Cloudy

69°F
Dew Pt 62°F
Wind from SW

SW 7 mph
Precip: 0%

Thu
11:00pm

Mostly Clear

68°F
Dew Pt 62°F
Wind from SW

SW 7 mph
Precip: 0%

Fri
12:00am

Partly Cloudy

68°F
Dew Pt 62°F
Wind from SW

SW 7 mph
Precip: 0%

Fri
1:00am

Partly Cloudy

68°F
Dew Pt 61°F
Wind from SW

SW 7 mph
Precip: 0%

Fri
2:00am

Partly Cloudy

68°F
Dew Pt 61°F
Wind from SW

SW 7 mph
Precip: 0%

Fri
3:00am

Partly Cloudy

68°F
Dew Pt 61°F
Wind from SW

SW 7 mph
Precip: 0%

Fri
4:00am

Partly Cloudy

67°F
Dew Pt 61°F
Wind from SW

SW 7 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 301836
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
236 PM EDT Wed Sep 30 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...

- Warm and pleasant stretch of weather arrives later this afternoon 
  through Friday evening. 

- Next chance for showers arrives Friday evening along and ahead
  of a rather strong cold front. 

- Dry and seasonable this weekend, but with more clouds on Sunday.

- Much cooler autumn airmass settles over Southern New England early 
  to middle of next week.


&&

.DISCUSSION...
KEY MESSAGE 1...Warm and pleasant stretch of weather arrives later 
this afternoon through Friday evening. 

Still have high confidence in improving weather conditions this 
afternoon through Friday as a mid-level ridge builds in over the 
region. At present, lingering low clouds and drizzle persist across 
eastern Massachusetts and Rhode Island. High res guidance shows this 
stubborn low cloud/drizzle layer mixing out in the next several 
hours and giving way to improving conditions. Could see some patchy 
fog overnight in the interior given abundant moisture and weak winds 
as the boundary layer decouples. Temps this afternoon will be quite 
a bit warmer than they have been in recent days. Highs today rise 
into the upper 60s to low 70s, then into the mid 70s and perhaps 
lower 80s Thursday and Friday. 


KEY MESSAGE 2...Next chance for showers arrives Friday evening along 
and ahead of a rather strong cold front. 

The next round of showers arrives after sunset Friday as a low 
pressure system moves across Ontario and Quebec and a cold front 
extends over the region. Guidance has trended later and weaker with 
the precip with the highest POPs (30-50%) occurring after sunset 
Friday. Regardless, not expecting much QPF out of this... less than 
a quarter inch likely. Most guidance is showing the front stalling 
out somewhere south of our waters, 

Once the low moves through Quebec, a rather strong continental high 
pressure system will build over Ontario, sinking those +4C to +6C 
850mb temperatures down into New England and sharply dropping 
surface temperatures through the weekend... overnight temps likely 
drop into the upper 30s to low 40s and daytime highs in the mid
60s.

KEY MESSAGE 3...Dry and seasonable this weekend, but with more 
clouds on Sunday.

Forecast outlook for this weekend now looks than it was looking 24 
hours ago. The last couple cycles of deterministic and ensemble 
guidance now conveys the idea that the strong high pressure which 
builds in on Saturday remains strong enough through Sunday to 
suppress rain showers lurching northward from the southern waters 
away from land. Sunday still features a considerable amount of cloud 
cover but dry weather looks to prevail, even as a pretty potent 500 
mb shortwave in the northern stream treks eastward along the 
US/Canada border Sunday night, draping a dry cold front southward 
into the Sunday night/early Monday timeframe. 

Saturday looks to be the pick of the weekend with mostly sunny skies 
and highs in the mid to upper 60s, but lower 60s along the 
eastern/southeast coast due to NEly onshore breezes. Highs Sunday 
should be a couple degrees cooler with more cloud cover.

KEY MESSAGE 4...Much cooler autumn airmass settles over 
Southern New England early to middle of next week.

Model guidance remains consistent on a dry, blustery and a much 
cooler autumn airmass for early to mid next week. This occurs in 
response to a strong upper trough establishing itself over the 
Northeast, with a sfc 1030 mb anticyclone over the Gt Lakes settling 
over New England by Tue night. Strong cold advection begins Monday 
afternoon with 925 mb temps dropping to as low as -2C by 12z Tue! 

Expect full sunshine and dry weather, but rather breezy on Monday 
with a tight northwesterly pressure gradient, with highs in the low 
to mid 60s and lows in the upper 30s to middle 40s. Even cooler 
weather arrives by Tue, with highs only in the mid 50s. Depending on 
how quickly winds slacken Tue night, some areas could have their 
first frost since last Spring, with lows in the low to mid 30s 
interior, upper 30s/mid 40s for the cities and low to mid 40s near 
the eastern/southeast coast. 


.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

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

18z TAF Update: 

Rest of Today...High confidence. 

SCT-BKN MVFR/VFR through 00z. Light northerly winds turning SW 
late in the day; ESE seabreezes BOS and PVD continue through 
00z.

Tonight...High confidence. 

Mainly VFR, though patchy fog/mist could possibly develop with 
the wet ground and light southwest winds. Greatest chance for
fog and mist across interior terminals like BDL. 

Thursday...High confidence. 

VFR. SW wind 8-12 kt.

KBOS Terminal...High confidence in TAF.

KBDL Terminal...Moderate confidence in TAF.

Outlook /Thursday Night through Monday/...

Friday through Friday Night: VFR. Breezy. Chance SHRA.

Saturday: VFR. Breezy. 

Saturday Night through Sunday Night: VFR. 

Monday: VFR. Breezy. 

&&

.MARINE...
Forecaster Confidence Levels...

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

Overall high confidence.

Fairly tranquil conditions through Friday with light SW winds
and seas below 5 feet. Seas build towards 5 feet by late 
Thursday/early Friday across the southern waters due to the 
sustained southwest winds.

Outlook /Thursday Night through Monday/...

Friday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft. 

Friday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers. 

Saturday: Winds less than 25 kt. Seas up to 5 ft. 

Saturday Night through Sunday: Winds less than 25 kt. Areas of
seas approaching 5 ft. 

Sunday Night: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers. 

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

&&

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

&&

$$

DISCUSSION...Loconto/FT
AVIATION...Dooley/FT
MARINE...McMinn/FT

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