Lexington Weather

Current Conditions [‒] Current Conditions [+]

28.9°F

-1.7°C

Cold

Clear

Overnight: Lo 27 °F

Wednesday: Hi 45 °F

Dew Point: 24.4°F Increased 0.3°F since last hour .

Humidity: 83% Increased 1.0% since last hour.

Air Quality Index: 23

Good

(Nitrogen Dioxide)

Barometer: 30.14 in S

1021 mb

Snow Today: 0.0 in

Snow Tuesday: 0.0 in

November: Trace

Winter: Trace

Depth: 0.0 in

Visibility: 10 miles

Wind:

Now: Calm

Avg: Calm

Gusts: 0 mph

OTHER PERSONAL WEATHER STATIONS

REGIONAL CONDITIONS

NWS Weather Forecast -
Overnight, Wednesday, & Wednesday Night through Tuesday

Issued by:
National Weather Service Boston / Norton, MA
Point Forecast Updated Wed Nov 19, 2025 4:48am EST

Overview:

High pressure builds overhead for today and Thursday, bringing relatively light winds and continued seasonable temperatures. A cold front will bring a period of unsettled weather Friday, which may linger into Saturday, then high pressure returns Sunday into early next week.

Overnight:

Mostly Clear

Lo 27 °F

Mostly clear, with a low around 27. West wind around 3 mph.

Wednesday:

Sunny

Hi 45 °F

Sunny, with a high near 45. Northwest wind 2 to 6 mph.

Wednesday Night:

Mostly Clear

Lo 24 °F

Mostly clear, with a low around 24. Northwest wind around 2 mph.

Thursday:

Partly Sunny

Hi 45 °F

Partly sunny, with a high near 45. Northeast wind around 3 mph.

Thursday Night:

Partly Cloudy

Lo 28 °F

Partly cloudy, with a low around 28. South wind around 3 mph.

Friday:

Partly Sunny then Slight Chance Light Rain

Hi 50 °F

A slight chance of rain after 2pm. Partly sunny, with a high near 50. Southwest wind 3 to 8 mph. Chance of precipitation is 20%.

Friday Night:

Slight Chance Light Rain

Lo 38 °F

A slight chance of rain. Mostly cloudy, with a low around 38. West wind around 7 mph.

Saturday:

Slight Chance Light Rain

Hi 49 °F

A slight chance of rain before 1pm. Mostly sunny, with a high near 49. Northwest wind around 7 mph.

Saturday Night:

Partly Cloudy

Lo 30 °F

Partly cloudy, with a low around 30. Northwest wind around 5 mph.

Sunday:

Slight Chance Light Rain

Hi 47 °F

A slight chance of rain between 9am and 1pm. Mostly sunny, with a high near 47. West wind around 6 mph.

Sunday Night:

Mostly Cloudy

Lo 34 °F

Mostly cloudy, with a low around 34. Southwest wind around 5 mph.

Monday:

Mostly Sunny then Slight Chance Light Rain

Hi 52 °F

A slight chance of rain after 5pm. Mostly sunny, with a high near 52. West wind around 7 mph.

Monday Night:

Chance Light Rain

Lo 35 °F

A chance of rain. Mostly cloudy, with a low around 35. West wind around 7 mph. Chance of precipitation is 30%.

Tuesday:

Slight Chance Light Rain then Mostly Sunny

Hi 49 °F

A slight chance of rain before noon. Mostly sunny, with a high near 49. Northwest wind around 9 mph.

FULL FORECAST

NWS Hourly Forecast -
Today 7am through Thu 6pm

Issued by:
National Weather Service Boston / Norton, MA
Updated Wed Nov 19, 2025 4:48am EST

7:00am

Mostly Sunny

28°F
Dew Pt 25°F
Wind Chill: 23°F
Wind from W

W 3 mph
Precip: 0%

8:00am

Mostly Sunny

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

W 3 mph
Precip: 0%

9:00am

Sunny

35°F
Dew Pt 27°F
Wind Chill: 32°F
Wind from W

W 5 mph
Precip: 0%

10:00am

Sunny

39°F
Dew Pt 27°F
Wind Chill: 36°F
Wind from NW

NW 5 mph
Precip: 0%

11:00am

Sunny

41°F
Dew Pt 27°F
Wind Chill: 38°F
Wind from NW

NW 5 mph
Precip: 0%

12:00pm

Sunny

43°F
Dew Pt 26°F
Wind Chill: 40°F
Wind from NW

NW 5 mph
Precip: 0%

1:00pm

Sunny

44°F
Dew Pt 25°F
Wind Chill: 41°F
Wind from NW

NW 6 mph
Precip: 0%

2:00pm

Sunny

44°F
Dew Pt 26°F
Wind Chill: 41°F
Wind from NW

NW 5 mph
Precip: 0%

3:00pm

Sunny

45°F
Dew Pt 25°F
Wind Chill: 43°F
Wind from NW

NW 5 mph
Precip: 0%

4:00pm

Sunny

43°F
Dew Pt 25°F
Wind Chill: 41°F
Wind from N

N 3 mph
Precip: 0%

5:00pm

Sunny

41°F
Dew Pt 26°F
Wind from N

N 2 mph
Precip: 0%

6:00pm

Clear

39°F
Dew Pt 25°F
Wind from N

N 2 mph
Precip: 0%

7:00pm

Mostly Clear

33°F
Dew Pt 25°F
Wind from N

N 2 mph
Precip: 0%

8:00pm

Mostly Clear

31°F
Dew Pt 25°F
Wind from NW

NW 2 mph
Precip: 0%

9:00pm

Mostly Clear

30°F
Dew Pt 24°F
Wind from NW

NW 2 mph
Precip: 0%

10:00pm

Mostly Clear

30°F
Dew Pt 24°F
Wind from NW

NW 2 mph
Precip: 0%

11:00pm

Mostly Clear

29°F
Dew Pt 24°F
Wind from NW

NW 2 mph
Precip: 0%

Thu
12:00am

Mostly Clear

28°F
Dew Pt 23°F
Wind from NW

NW 2 mph
Precip: 0%

Thu
1:00am

Mostly Clear

27°F
Dew Pt 23°F
Wind from NW

NW 2 mph
Precip: 0%

Thu
2:00am

Mostly Clear

26°F
Dew Pt 22°F
Wind from NW

NW 2 mph
Precip: 0%

Thu
3:00am

Partly Cloudy

25°F
Dew Pt 22°F
Wind from NW

NW 2 mph
Precip: 1%

Thu
4:00am

Partly Cloudy

24°F
Dew Pt 22°F
Wind from NW

NW 2 mph
Precip: 1%

Thu
5:00am

Partly Cloudy

24°F
Dew Pt 22°F
Wind from NW

NW 2 mph
Precip: 1%

Thu
6:00am

Mostly Sunny

24°F
Dew Pt 22°F
Wind from N

N 2 mph
Precip: 1%

Thu
7:00am

Partly Sunny

26°F
Dew Pt 23°F
Wind Chill: 22°F
Wind from NW

NW 3 mph
Precip: 1%

Thu
8:00am

Partly Sunny

29°F
Dew Pt 25°F
Wind from N

N 3 mph
Precip: 0%

Thu
9:00am

Partly Sunny

33°F
Dew Pt 26°F
Wind from N

N 3 mph
Precip: 0%

Thu
10:00am

Partly Sunny

37°F
Dew Pt 27°F
Wind from N

N 2 mph
Precip: 0%

Thu
11:00am

Partly Sunny

41°F
Dew Pt 28°F
Wind from N

N 2 mph
Precip: 0%

Thu
12:00pm

Partly Sunny

43°F
Dew Pt 28°F
Wind from NE

NE 2 mph
Precip: 0%

Thu
1:00pm

Partly Sunny

45°F
Dew Pt 29°F
Wind from NE

NE 2 mph
Precip: 1%

Thu
2:00pm

Partly Sunny

45°F
Dew Pt 29°F
Wind from NE

NE 2 mph
Precip: 1%

Thu
3:00pm

Mostly Sunny

44°F
Dew Pt 30°F
Wind from E

E 2 mph
Precip: 1%

Thu
4:00pm

Mostly Sunny

42°F
Dew Pt 30°F
Wind from E

E 2 mph
Precip: 1%

Thu
5:00pm

Mostly Sunny

40°F
Dew Pt 30°F
Wind from E

E 2 mph
Precip: 1%

Thu
6:00pm

Partly Cloudy

38°F
Dew Pt 30°F
Wind from E

E 1 mph
Precip: 1%

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 191108
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
608 AM EST Wed Nov 19 2025

.SYNOPSIS...
High pressure builds overhead for today and Thursday, bringing 
relatively light winds and continued seasonable temperatures. A cold 
front will bring a period of unsettled weather Friday, which may 
linger into Saturday, then high pressure returns Sunday into early 
next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
Key Messages: 

* Cool, dry, and less windy today.

Today: 

A wave of low pressure will pass just to the south of SNE today, 
while high pressure is over southern New England.  Mid-level dry air 
will keep rain to our south, except for Nantucket, which may see a 
few light showers this morning.  Skies across the south coast will 
likely remain overcast much of the day, while northern Mass should 
stay mostly sunny.  Weak warm-air advection will allow highs to 
reach the mid to upper 40s.

Tonight:

High pressure remains parked over northern New England.  Winds flip 
more northerly overnight, but remain light.  High-level clouds do 
filter late over night as a weak piece of shortwave energy traverses 
the zonal flow.  Should still see fairly good radiational cooling, 
with temps falling into the upper teens to mid 20s away from the 
coasts and urban areas.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
Key Messages: 

* Dry weather and below normal temperatures. 

No weather concerns heading into Thursday. 1025mb high pressure is 
over New England for most of the day and then moving towards the 
Canadian Maritimes overnight. Mixture of sun and clouds during the 
day, giving way to more clouds late day into the overnight due to 
WAA at 850mb. Otherwise a dry period with below normal temperatures. 
Highs in the 40s and lows in the 20s, coastal locations hover around 
freezing. Winds remain light and from the ENE.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
Key Messages: 

* No impactful weather expected Friday through early next week. A 
  chance for showers late Friday into early Saturday, otherwise a 
  mainly dry period of weather. 

Deterministic models and ensemble members continue to have agreement 
with a northern stream shortwave moving across northern New England 
Friday evening. Thus, expect the daylight hours remains dry, with a 
better chance for showers overnight into early Saturday. Where there 
is disagreement is among how much moisture is available. GFS is the 
most robust, with PWATs above 1.0" while ECMWF, NAM, and Canadian 
favor less in the way of moisture. Generally less than 0.5" for the 
areas away from the south coast of CT, RI, and MA. Do think the GFS 
is more robust is due to a weak low pressure system development over 
southern New England during this time frame. This scenario remains 
an outlier. Nevertheless, this is a weakly forced environment and do 
not expect any impacts. FWIW, DESI probabilities for 0.10" are best 
south of I-90 between 30 to 50 percent. A southwest flow leads to a 
warmer, albeit seasonable day, temperatures on Friday reach low-50s 
for the coastal plain and upper-40s across the high terrain. A cold 
front swings through on Saturday, 850mb temperatures at 12z are +5C 
to +7C at 12z and by 00z temperatures drop -2C to 0C. Any lingering 
moisture could result in a few flurries on Saturday. Highs are in 
the 30s for the high terrain and 40s for the coastal plain. 

Area of high pressure builds across the eastern seaboard Sunday into 
early next week. The 500mb pattern is quasi-zonal, a weak shortwave 
does pass through on Sunday, but given the dry atmosphere, think it 
adds more clouds than anything to the forecast, otherwise a dry day. 
Monday and Tuesday there is subtle mid-level ridging and continued 
surface high pressure, dry conditions remain during this period. As 
for temperatures highs are generally in the upper-40s to lower-50s 
and nighttime lows in the 30s.

&&

.AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
Forecaster Confidence Levels...

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

Update: 12z TAF 

There were no significant changes from previous issuance, there 
remains a low chance for a shower along the immediate coast and 
islands. There remains a good amount of dry air at the surface, thus 
any shower would be light and short lived. 

Today and Tonight...High Confidence. 

VFR. West winds turning NW less than 10 knots. Showers possible at 
ACK early this AM, otherwise dry for the rest of the region.

Thursday... High Confidence. 

VFR. Variable wind direction across much of the region with speeds 
less than 5 knots. Across eastern MA and RI, wind direction are from 
the NE with speeds less than 8 knots.

KBOS Terminal...High confidence in TAF. 

VFR. W winds turning NNW around 10 knots.

KBDL Terminal...High confidence in TAF.

VFR. Light NW winds around 5 knots. 

Outlook /Friday through Sunday/... 

Friday through Friday Night: Mainly VFR, with local MVFR
possible. Slight chance RA.

Saturday through Sunday: VFR. Slight chance RA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Today through Thursday... High Confidence.

Weak low pressure system passes south of the waters today, bringing 
shower activity to the southern outer waters. High pressure returns 
tonight into Thursday with tranquil conditions. 

Seas today and Thursday are less than 3 feet. Light NW to NNW wind 
with gusts less than 15 knots today. Wind becomes calm overnight and 
then going NNE to NE Thursday with gusts less than 10 knots. 

Outlook /Friday through Sunday/... 

Friday: Winds less than 25 kt. Slight chance of rain. 

Friday Night: Winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain. 

Saturday: Winds less than 25 kt. Chance of rain. 

Saturday Night through Sunday: Winds less than 25 kt. Slight
chance of rain.

&&

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

&&

$$

SYNOPSIS...Dooley/KP
NEAR TERM...KP
SHORT TERM...Dooley
LONG TERM...Dooley
AVIATION...Dooley/KP
MARINE...Dooley/KP

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Precipitation [‒] Precipitation [+]

Note: Rain measured automatically by weather station. Rain totals do not necessarily include melted frozen precipitation.

For more accurate, manually measured rain data, see the Local Precip Data page.

0.0 in

Snow Today:

0.0 in

Snow Tuesday:

Trace

November total:

Trace

Season total:

0.0 in

Snow Depth:

1 snow day in November

1 snow day this season

Daily Extremes [‒] Daily Extremes [+]

12:00am

32.7°F

High today:

7:24am

28.8°F

Low today:

12:42pm

46.8°F

High Tuesday:

11:49pm

32.7°F

Low Tuesday:

7:40am

27.5°F

Low wind chill today:

7:57am

30.0°F

Low wind chill Tuesday:

12:00am

25.0°F

High dew pt today:

11:50am

29.8°F

High dew pt Tuesday:

7:40am

2 mph

Wind gust today:

11:57am

10 mph

Wind gust Tuesday:

MORE EXTREMES

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No alerts/warnings active for Southeast Middlesex County.

Sun / Moon [‒] Sun / Moon [+]

First Light:

6:11am

Sunrise:

6:41am

Sunset:

4:20pm

Twilight ends:

4:50pm

Daylight length:

9 hours 38 minutes

Waning Crescent, Moon age: 29 days, 0 hours, 30 minutes, 1%

Phase:

Waning Crescent (1%)

Moon rise:

6:14am

Moon set:

3:34pm

Lexington Weather

Current Conditions [‒] Current Conditions [+]

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REGIONAL CONDITIONS

Forecast [‒] Forecast [+]

NWS Weather Forecast -
Overnight, Wednesday, & Wednesday Night through Tuesday

Overview:

Overnight:

Wednesday:

Wednesday Night:

Thursday:

Thursday Night:

Friday:

Friday Night:

Saturday:

Saturday Night:

Sunday:

Sunday Night:

Monday:

Monday Night:

Tuesday:

FULL FORECAST

NWS Hourly Forecast -
Today 7am through Thu 6pm

VIEW ON NWS WEB SITE

FORECAST DISCUSSION

Area Forecast Discussion
for Boston / Norton, MA

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NWS Weather Forecast - Overnight, Wednesday, & Wednesday Night through Tuesday

Overview:

Overnight:

Wednesday:

Wednesday Night:

Thursday:

Thursday Night:

Friday:

Friday Night:

Saturday:

Saturday Night:

Sunday:

Sunday Night:

Monday:

Monday Night:

Tuesday:

NWS Hourly Forecast - Today 7am through Thu 6pm

Area Forecast Discussion for Boston / Norton, MA

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Satellite [‒] Satellite [+]

Precipitation [‒] Precipitation [+]

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NWS Weather Forecast -
Overnight, Wednesday, & Wednesday Night through Tuesday

NWS Hourly Forecast -
Today 7am through Thu 6pm

Area Forecast Discussion
for Boston / Norton, MA