Lexington Weather

Current Conditions [‒] Current Conditions [+]

46.6°F Colder than last hour.

8.1°C

Chilly

Clear

This Afternoon: Hi 52 °F

Tonight: Lo 29 °F

Dew Point: 32.2°F Increased 0.4°F since last hour .

Humidity: 57% Increased 1.0% since last hour.

Air Quality Index: 19

Good

(Ozone)

Barometer: 30.17 in Rising 0.02 inHg/hr

1022 mb

Rain Rate: 0.00 in/hr

Rain Today: 0.00 in

Rain Friday: 0.33 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
This Afternoon, Tonight, & Sunday through Friday Night

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Sat Oct 17, 2026 2:51pm EDT

Overview:

- Diminishing winds and clearing tonight with cold low temps in the 20s and 30s with widespread frost/freeze conditions. Sunshine returns on Sunday with highs in the 50s with light winds.

- Mainly dry for the upcoming workweek except near coastal areas. Otherwise, the other big story is a modest warming trend with high pressure building in across the Northeastern United States.

This Afternoon:

Sunny

Hi 52 °F

Sunny, with a high near 52. North wind around 10 mph, with gusts as high as 26 mph.

Tonight:

Widespread Frost

Lo 29 °F

Widespread frost after 11pm. Clear, with a low around 29. Northwest wind 3 to 8 mph, with gusts as high as 25 mph.

Sunday:

Widespread Frost then Sunny

Hi 55 °F

Widespread frost before 9am. Sunny, with a high near 55. West wind around 3 mph.

Sunday Night:

Clear then Areas Of Frost

Lo 33 °F

Areas of frost after 1am. Clear, with a low around 33. Southwest wind around 3 mph.

Monday:

Areas Of Frost then Sunny

Hi 58 °F

Areas of frost before 8am. Sunny, with a high near 58. North wind 2 to 6 mph.

Monday Night:

Mostly Cloudy

Lo 40 °F

Mostly cloudy, with a low around 40. Northeast wind around 6 mph.

Tuesday:

Partly Sunny

Hi 60 °F

Partly sunny, with a high near 60. North wind 7 to 10 mph, with gusts as high as 22 mph.

Tuesday Night:

Partly Cloudy

Lo 42 °F

Partly cloudy, with a low around 42. Northeast wind 6 to 10 mph.

Wednesday:

Mostly Sunny

Hi 54 °F

Mostly sunny, with a high near 54. Northeast wind around 12 mph, with gusts as high as 25 mph.

Wednesday Night:

Mostly Cloudy

Lo 41 °F

Mostly cloudy, with a low around 41. Northeast wind around 8 mph.

Thursday:

Slight Chance Rain Showers

Hi 57 °F

A slight chance of rain showers between 10am and 1pm. Partly sunny, with a high near 57. North wind 5 to 9 mph.

Thursday Night:

Partly Cloudy

Lo 43 °F

Partly cloudy, with a low around 43. North wind 3 to 8 mph.

Friday:

Mostly Sunny

Hi 57 °F

Mostly sunny, with a high near 57. North wind 8 to 12 mph, with gusts as high as 23 mph.

Friday Night:

Partly Cloudy then Slight Chance Rain Showers

Lo 42 °F

A slight chance of rain showers after 3am. Partly cloudy, with a low around 42. North wind around 8 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 5pm through Mon 4am

Issued by:
National Weather Service Boston / Norton, MA
Updated Sat Oct 17, 2026 2:51pm EDT

5:00pm

Sunny

48°F
Dew Pt 25°F
Wind Chill: 43°F
Wind from N

N 10 mph
Precip: 0%

6:00pm

Clear

45°F
Dew Pt 25°F
Wind Chill: 41°F
Wind from N

N 8 mph
Precip: 0%

7:00pm

Clear

42°F
Dew Pt 24°F
Wind Chill: 38°F
Wind from N

N 7 mph
Precip: 0%

8:00pm

Clear

42°F
Dew Pt 24°F
Wind Chill: 38°F
Wind from N

N 7 mph
Precip: 0%

9:00pm

Clear

41°F
Dew Pt 24°F
Wind Chill: 36°F
Wind from N

N 7 mph
Precip: 0%

10:00pm

Clear

39°F
Dew Pt 24°F
Wind Chill: 35°F
Wind from N

N 6 mph
Precip: 0%

11:00pm

Areas Of Frost

38°F
Dew Pt 24°F
Wind Chill: 34°F
Wind from N

N 6 mph
Precip: 0%

Sun
12:00am

Areas Of Frost

37°F
Dew Pt 24°F
Wind Chill: 33°F
Wind from N

N 5 mph
Precip: 0%

Sun
1:00am

Areas Of Frost

35°F
Dew Pt 24°F
Wind Chill: 31°F
Wind from NW

NW 5 mph
Precip: 0%

Sun
2:00am

Areas Of Frost

34°F
Dew Pt 24°F
Wind Chill: 31°F
Wind from NW

NW 3 mph
Precip: 0%

Sun
3:00am

Areas Of Frost

32°F
Dew Pt 24°F
Wind Chill: 29°F
Wind from NW

NW 3 mph
Precip: 0%

Sun
4:00am

Widespread Frost

32°F
Dew Pt 24°F
Wind Chill: 29°F
Wind from NW

NW 3 mph
Precip: 0%

Sun
5:00am

Widespread Frost

30°F
Dew Pt 24°F
Wind Chill: 26°F
Wind from NW

NW 3 mph
Precip: 0%

Sun
6:00am

Widespread Frost

30°F
Dew Pt 24°F
Wind from NW

NW 2 mph
Precip: 0%

Sun
7:00am

Widespread Frost

29°F
Dew Pt 25°F
Wind from W

W 2 mph
Precip: 0%

Sun
8:00am

Areas Of Frost

31°F
Dew Pt 26°F
Wind Chill: 28°F
Wind from W

W 3 mph
Precip: 0%

Sun
9:00am

Sunny

35°F
Dew Pt 28°F
Wind from NW

NW 2 mph
Precip: 0%

Sun
10:00am

Sunny

41°F
Dew Pt 29°F
Wind from NW

NW 2 mph
Precip: 0%

Sun
11:00am

Sunny

46°F
Dew Pt 29°F
Wind from N

N 2 mph
Precip: 0%

Sun
12:00pm

Sunny

48°F
Dew Pt 30°F
Wind from W

W 2 mph
Precip: 0%

Sun
1:00pm

Sunny

51°F
Dew Pt 31°F
Wind from W

W 2 mph
Precip: 0%

Sun
2:00pm

Sunny

52°F
Dew Pt 31°F
Wind from W

W 2 mph
Precip: 0%

Sun
3:00pm

Sunny

53°F
Dew Pt 32°F
Wind from W

W 3 mph
Precip: 0%

Sun
4:00pm

Sunny

53°F
Dew Pt 34°F
Wind from SW

SW 3 mph
Precip: 0%

Sun
5:00pm

Sunny

53°F
Dew Pt 35°F
Wind from S

S 3 mph
Precip: 0%

Sun
6:00pm

Clear

53°F
Dew Pt 36°F
Wind from SE

SE 3 mph
Precip: 0%

Sun
7:00pm

Clear

48°F
Dew Pt 36°F
Wind Chill: 47°F
Wind from SE

SE 3 mph
Precip: 0%

Sun
8:00pm

Clear

45°F
Dew Pt 36°F
Wind Chill: 44°F
Wind from S

S 3 mph
Precip: 0%

Sun
9:00pm

Clear

43°F
Dew Pt 36°F
Wind Chill: 41°F
Wind from S

S 3 mph
Precip: 0%

Sun
10:00pm

Clear

41°F
Dew Pt 36°F
Wind from S

S 2 mph
Precip: 0%

Sun
11:00pm

Clear

40°F
Dew Pt 36°F
Wind from S

S 2 mph
Precip: 0%

Mon
12:00am

Clear

38°F
Dew Pt 36°F
Wind from S

S 2 mph
Precip: 0%

Mon
1:00am

Areas Of Frost

36°F
Dew Pt 34°F
Wind from SW

SW 2 mph
Precip: 0%

Mon
2:00am

Areas Of Frost

35°F
Dew Pt 34°F
Wind from SW

SW 2 mph
Precip: 0%

Mon
3:00am

Areas Of Frost

35°F
Dew Pt 34°F
Wind from W

W 2 mph
Precip: 0%

Mon
4:00am

Areas Of Frost

34°F
Dew Pt 34°F
Wind from W

W 2 mph
Precip: 0%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 171830
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
230 PM EDT Sat Oct 17 2026

.WHAT HAS CHANGED...

Gale Watches issued for our southern waters early next week. 

&&

.KEY MESSAGES...

- Diminishing winds and clearing tonight with cold low temps in the 
  20s and 30s with widespread frost/freeze conditions. Sunshine 
  returns on Sunday with highs in the 50s with light winds.

- Mainly dry for the upcoming workweek except near coastal 
  areas. Otherwise, the other big story is a modest warming 
  trend with high pressure building in across the Northeastern 
  United States. 

&&

.DISCUSSION...

KEY MESSAGE 1...Diminishing winds and clearing tonight with cold 
low temps in the 20s and 30s with widespread frost/freeze conditions. 
Sunshine returns on Sunday with highs in the 50s with light winds.

Model cross sections indicate that lingering mid level cloudiness 
pushes south of the region tonight. This combined with high pressure 
building in from the west coupled with diminishing winds and a dry 
airmass in place will set the stage for a cold night. Low temps 
should bottom out in the middle to upper 20s in many locations with 
lower to middle 30s common in the urban heat islands as well as the 
Cape/Nantucket where winds will not decouple. Widespread 
frost/freeze conditions expected...But our Frost/Freeze program has 
ended already so no headlines needed.

High pressure will result in sunny skies for Sunday. High temps will 
be in the 50s...which is a bit below normal for this time of year. 
However...with very little wind outside the Cape/Islands it will 
feel significantly milder by afternoon than today. 

High pressure remains in control of our weather Sunday night with 
mainly clear skies. This will result in another good night of 
radiational cooling with lows in the 20s and 30s.

KEY MESSAGE 2...Mainly dry for the upcoming workweek except near 
coastal areas. Otherwise, the other big story is a modest warming 
trend with high pressure building in across the Northeastern United 
States. 

General theme for the long term forecast is the return of drier and 
somewhat warmer conditions going into the workweek as a broad ridge 
of high pressure develops over the CONUS. Outside of this, guidance 
continues to indicate the development of low pressure towards the 
mid-Atlantic/Carolina coastal waters later Sunday into the day on 
Monday. Ironically, this feature stems from last night's cold front 
as it continues to move offshore and stall into a stationary 
boundary. At the same time, lingering upper level energy cuts off 
and induces the development of a frontal wave off the coast of the 
Carolinas later Saturday night into Sunday morning. Still see a 
signal for enough of a weakness in the ridge for low pressure to 
move N and affect coastal areas Monday and Tuesday. Have continued 
to see drier solutions with this storm as a dry airmass precedes the 
northward precip shield. 12z global guidance QPF looks quite 
limited, with ensemble probabilities for any measurable rainfall 
mostly between 10-50%, with the GEFS and Canadian ENS skewing 
slightly higher over the Cape and Islands at 50-60%. The ECMWF 
ensemble is the lowest of the three, with the highest probabilities 
over land being 10-30%. However, marine impacts with this 
disturbance are looking a bit more impactful as it stays relatively 
stationary and churns over the same waters for an extended period of 
time, which will help build seas up to 15 ft offshore of Nantucket.
 
The gradient between this area of low pressure and the preexisting 
high pressure over southern New England will tighten greatly, 
increasing ENE winds over the waters and towards the Cape and 
Islands, RI, and the coastal plain in SE MA. Ensembles have 
continued to indicate decent probabilities of sustained winds 
reaching gale-force over the southern waters, with the GEFS and 
Canadian ensemble up to 30-40% (and even up to 60% in the Canadian 
guidance) just south of the Islands. In terms of gale- force gusts, 
probabilities have increased further from the last update, reaching 
the high (80-100%) range in the ECMWF ensemble and up to 80% in the 
GEFS. Persistent easterly fetch associated with these winds, along 
with building rough seas, will need to be monitored as well, as 
beach erosion for east- and northeast- facing beaches may become an 
issue.

&&

.AVIATION /18Z SATURDAY THROUGH THURSDAY/...

Forecaster Confidence Levels...

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

This afternoon through Sunday night...High confidence.

VFR conditions continue through Sunday night. N-NW wind gusts of 20 
to 30 knots diminish this evening. Otherwise...calm/light winds 
overnight into Sunday night except N-NE winds persisting at 5-15 
knots across the Cape/Islands. 

KBOS Terminal...High confidence in TAF. 

KBDL Terminal...High confidence in TAF.

Outlook /Monday through Thursday/...

Monday: VFR. Breezy. 

Monday Night: VFR. Windy with local gusts up to 30 kt. 

Tuesday: VFR. Windy with gusts up to 30 kt. 

Tuesday Night: VFR. Windy with gusts up to 35 kt. 

Wednesday: Mainly VFR, with local MVFR possible. Windy with
gusts up to 35 kt. 

Wednesday Night: Mainly VFR, with local MVFR possible. Windy
with areas of gusts up to 35 kt. Slight chance SHRA.

Thursday: Mainly VFR, with local MVFR possible. Windy with
gusts up to 30 kt. Slight chance SHRA.

&&

.MARINE...

Forecaster Confidence Levels...

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

Tonight through Sunday night...High confidence.

N wind gusts of 20 to 30 knots persist tonight...strongest of which 
will be across our southern waters. Small craft headlines continue 
for most of our waters. Some marginal lingering small craft advisory 
conditions may persist across the southern waters Sun morning. 
Otherwise...high pressure building in from the west will result in 
winds/seas below small craft much of Sun into Sun evening. 
However...distant ocean storm off the mid-Atlantic coast should 
result in small craft advisory seas/wind gusts returning for our 
southern waters toward daybreak Mon. Additional marine headlines 
will be needed for much of the upcoming work week because of this 
ocean storm. 

Outlook /Monday through Thursday/...

Monday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Rough seas up to 14 ft. Chance of rain showers. 

Monday Night: Low risk for gale force winds with gusts up to
35 kt. Rough seas up to 14 ft. Chance of rain showers. 

Tuesday: Strong winds with gusts up to 40 kt. Rough seas up to
14 ft. Chance of rain showers. 

Tuesday Night: Moderate risk for gale force winds with gusts up
to 45 kt. Rough seas up to 14 ft. Chance of rain showers. 

Wednesday through Wednesday Night: Moderate risk for gale force
winds with local gusts up to 45 kt. Rough seas up to 15 ft.
Chance of rain showers. 

Thursday: Strong winds with gusts up to 40 kt. Rough seas up to
14 ft. Chance of rain showers. 

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ230-
     236.
     Small Craft Advisory until 2 AM EDT Sunday for ANZ231-251.
     Small Craft Advisory until 8 AM EDT Sunday for ANZ232>235-237-
     250.
     Small Craft Advisory until 11 AM EDT Sunday for ANZ254>256.

&&

$$

DISCUSSION...Frank/FT
AVIATION...Frank/FT
MARINE...Frank/FT

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